# Welcome Thank you for choosing Grow Sensor! You’re now part of a community of growers using cutting-edge technology to take their growing to the next level. Your Grow Sensor is designed to give you precise insights into your environment, helping you to make smarter decisions and grow healthier, more productive plants. Whether you’re a home grower or running a larger setup, our goal is to make growing easier, more efficient, and more rewarding. We’ve created a comprehensive guide filled with information and FAQs to help you get started. This resource will continue to evolve as we introduce new features and growing methods, ensuring you always have the knowledge you need to grow the best plants. And if you ever need help, we’re here for you! [Contact us here](https://www.growsensor.co/contact-us) or at Download on the [Android Play Store](https://play.google.com/store/apps/details?hl=en\&id=com.growsensor.android.prod) | Download on the [IOS App Store ](https://apps.apple.com/gb/app/grow-sensor-read-the-room/id6473087688)\ \ Download for Android Download for Apple ### Jump right in {% content-ref url="/pages/AYpmAfjz4nihd5cczcJQ" %} [What is the Grow Sensor?](/welcome/what-is-the-grow-sensor) {% endcontent-ref %} {% content-ref url="/pages/zDB6cpH6VAADIN66bnqb" %} [What does the Grow Sensor measure?](/welcome/what-does-the-grow-sensor-measure) {% endcontent-ref %} {% content-ref url="/pages/ubz87Jo9coawYd857v4y" %} [How do I onboard my Grow Sensor?](/getting-started/how-do-i-onboard-my-grow-sensor) {% endcontent-ref %} # What is the Grow Sensor? The Grow Sensor is a cutting-edge open ecosystem environmental monitoring device designed to give growers complete control over their cultivation environment. It measures essential grow room conditions and supports substrate probes to track EC, water content, and root zone temperature. Built for accuracy and reliability, the Grow Sensor offers flexible power options - running on battery or via USB. It’s WiFi-enabled and features offline data logging to ensure no data loss during internet outages. It's compact, feature-packed, and intelligent, designed for all types of growers, from micro-grows to large-scale operations. Whether you need near real-time data for precision growing or a reliable backup for environmental tracking, the Grow Sensor helps you dial in the perfect conditions for healthier plants and bigger yields. # What does the Grow Sensor measure? The Grow Sensor monitors key environmental factors in real time, helping you fine-tune your grow space for optimal plant health and yield. Here’s what it measures and why it matters: * [Temperature](https://www.growsensor.co/post/ideal-temp-humidity-grow-tent-part-1) – Controls plant metabolism, affecting growth speed and nutrient uptake. Too hot or too cold can stress plants and reduce yields. * [Relative humidity (RH)](https://www.growsensor.co/post/ideal-grow-room-temp-humidity-part-2) – Impacts transpiration and nutrient absorption. High RH can lead to mould, while low RH can slow growth. * [CO₂ levels ](https://www.growsensor.co/post/maximize-your-cannabis-yield-the-essential-guide-to-co2-supplementation-for-home-growers)– Essential for photosynthesis. Maintaining ideal CO₂ levels boosts growth and maximises yields. * [ePPFD](https://www.growsensor.co/post/ultimate-ppfd-meter) (extended Photosynthetic Photon Flux Density) – Monitors how much light plants receive, ensuring the right amount of light for optimal photosynthesis. * [ePAR](https://www.growsensor.co/post/apogee-par-meter-vs-grow-sensor-a-comparison) (extended Light Spectrum) – Monitors the full range of light wavelengths plants use for growth, improving energy efficiency and development. * [eDLI](https://www.growsensor.co/post/ppf-dli-the-grow-sensor) (extended Daily Light Integral) – Tracks total light exposure over 24 hours, helping to optimise lighting schedules. * [Leaf surface temperature](https://www.growsensor.co/post/why-leaf-surface-temperature-important) – More accurate than ambient temperature for detecting heat stress and optimising VPD. * Ambient VPD ([Vapour Pressure Deficit](https://www.growsensor.co/category/vpd))– Helps balance humidity and temperature for stress-free plant growth. * [True Leaf VPD](https://www.growsensor.co/post/measuring-leaf-surface-temperature-with-the-grow-sensor) – Ensures efficient transpiration, preventing overwatering and nutrient lockout. * Leaf temperature off set. - Shows you the live difference between ambient temperature and leaf temperature. * Substrate EC (Electrical Conductivity) – Indicates nutrient concentration in the growing medium, preventing over- or underfeeding. * Water content in the substrate – Prevents over- or underwatering, improving root health. * Root zone temperature – Affects nutrient absorption and root development. * [Dew point](https://www.growsensor.co/post/dew-point-cannabis-growers) – Predicts condensation risk, reducing the chance of mould and mildew. * Air pressure – Can impact gas exchange and overall plant health. With the Grow Sensor, you get precise data to fine-tune your environment, reduce risks, and maximise yields effortlessly. # Getting started Please ensure that you read and agree to the [Terms and Conditions](https://www.termsfeed.com/live/de519a3e-de05-4e4f-98f3-0d648e98d56e) before setting up your Grow Sensor. {% content-ref url="/pages/ubz87Jo9coawYd857v4y" %} [How do I onboard my Grow Sensor?](/getting-started/how-do-i-onboard-my-grow-sensor) {% endcontent-ref %} {% content-ref url="/pages/rKsOhEN0z0jdH0Yn1CM4" %} [How do I hang my Grow Sensor in my environment?](/getting-started/how-do-i-hang-my-grow-sensor-in-my-environment) {% endcontent-ref %} {% content-ref url="/pages/wKB0tbNsEv4iGpL11YIv" %} [How do I set up my leaf temperature sensor?](/getting-started/how-do-i-set-up-my-leaf-temperature-sensor) {% endcontent-ref %} {% content-ref url="/pages/VVGMaCjcVBZ1cRvbdshy" %} [How do I set up my substrate probe?](/getting-started/how-do-i-set-up-my-substrate-probe) {% endcontent-ref %} {% content-ref url="/pages/UecWml5eZBn1ZLLiplDa" %} [How do I charge my Grow Sensor?](/getting-started/how-do-i-charge-my-grow-sensor) {% endcontent-ref %} {% content-ref url="/pages/aNZchgkdE8988OOXwU8o" %} [How do I use the Grow Sensor App?](/getting-started/how-do-i-use-the-grow-sensor-app) {% endcontent-ref %} # How do I onboard my Grow Sensor? {% content-ref url="/pages/uFGNpynOQuV8jCo711MW" %} [Do I need to charge my Grow Sensor when it arrives?](/getting-started/how-do-i-onboard-my-grow-sensor/do-i-need-to-charge-my-grow-sensor-when-it-arrives) {% endcontent-ref %} {% content-ref url="/pages/tipO4tv8UhP3IlkCud65" %} [How do I connect my Grow Sensor to my Wi-Fi network?](/getting-started/how-do-i-onboard-my-grow-sensor/how-do-i-connect-my-grow-sensor-to-my-wi-fi-network) {% endcontent-ref %} {% content-ref url="/pages/c7pDT0QpxFaICa5ewIbk" %} [How quickly will I see graph data in the app after onboarding?](/getting-started/how-do-i-onboard-my-grow-sensor/how-quickly-will-i-see-graph-data-in-the-app-after-onboarding) {% endcontent-ref %} Once your Grow Sensor is successfully onboarded, we recommend [calibrating the CO₂ sensor before use. ](/the-grow-sensor/how-do-i-calibrate-the-grow-sensor/do-i-need-to-calibrate-any-other-sensors) The CO₂ sensor is highly sensitive, and vibrations during shipping can slightly affect its readings. \ To ensure accuracy, please follow the in-app instructions to calibrate your sensor once it’s in place. It only takes a moment and helps guarantee reliable environmental data for your grow. # Do I need to charge my Grow Sensor when it arrives? Yes, we recommend charging your Grow Sensor when it arrives. For shipping safety regulations, it’s only partially charged when dispatched. A quick top-up ensures it’s fully powered and ready to start monitoring your grow environment straight away. # How do I connect my Grow Sensor to my Wi-Fi network? Connecting your GrowSensor is quick and easy: {% stepper %} {% step %} Download the Grow app from the [Android Play Store](https://play.google.com/store/apps/details?hl=en\&id=com.growsensor.android.prod) | Download on the [IOS App Store ](https://apps.apple.com/gb/app/grow-sensor-read-the-room/id6473087688)\ \ Download for Android Download for Apple {% endstep %} {% step %} Open the app and create an account. {% endstep %} {% step %} Follow the in-app instructions to connect your sensor to your Wi-Fi network -it takes just 30 seconds! {% endstep %} {% endstepper %} {% hint style="info" %} Important: The Grow Sensor only works on 2.4GHz Wi-Fi networks. {% endhint %} ### Why does **the app ask for Bluetooth and location access?** During onboarding, you’ll be asked to grant Bluetooth and location access. * Bluetooth access is required to communicate with your Grow Sensor during setup. * Location access is needed because Android requires it for scanning and connecting to Wi-Fi networks via Bluetooth. We do not track your location - it’s just a technical requirement for enabling Wi-Fi setup. ### T**roubleshooting connection issues** If you’re having trouble connecting, try the following: * Stand close to your router during setup. * Double-check your Wi-Fi password for accuracy. If you’re still having issues, contact us at , and we’ll help you get set up! # How quickly will I see graph data in the app after onboarding? You’ll see your first live sensor data immediately after onboarding - both on the dashboard and in the graphs. The sensor starts collecting and updating data right away, so you can start monitoring # How do I hang my Grow Sensor in my environment? Proper placement of your GrowSensor is key to getting accurate and reliable readings. Follow these steps for the best setup: ### P**ositioning the sensor** * **Hang it at canopy level** - Align the sensor's top with the tops of your plants for the most relevant environmental data. * **Adjust as your plants grow** - Move the sensor up as your plants develop to maintain accuracy. ### A**voiding interference** * **Keep it away from direct airflow** - Position it away from fans, vents, or extreme conditions that can distort temperature and humidity readings. * **Centre it in your grow space** - If possible, hang the sensor directly below your lights rather than off to the side. ### M**ounting with the hanging cable** The Grow Sensor includes a simple and effective cable system for easy height adjustments:
{% stepper %} {% step %} Secure the zip tie around the top of your frame or grow tent pole.
{% endstep %} {% step %} Thread the hanging cable through the zip tie and tighten it.
{% endstep %} {% step %} Keep the cable accessible so you can adjust it as needed.
{% endstep %} {% step %} Pull the cable end to raise the sensor as your plants grow - it will move with them. {% endstep %} {% step %} At the end of your grow, lower and reposition the sensor at canopy height for your next cycle. {% endstep %} {% endstepper %} ### U**sing a tripod mount (Alternative option)** The Grow Sensor also features a standard threaded tripod mount on the bottom of the unit. This is perfect for setups where hanging the sensor from a cable isn’t possible. Any standard tripod will work. [For detailed instructions, check out our full guide here.](https://www.growsensor.co/post/measure-temperature-in-a-grow-room)
# How do I set up my leaf temperature sensor? Setting up the Leaf Temperature Sensor is quick and easy: {% stepper %} {% step %} **Position it correctly** Place the base of the sensor over a leaf as close to the top of the plant as possible (the leaf temperature sensor is on the bottom of the Grow Sensor). {% endstep %} {% step %} **Monitor live data** Once positioned, the sensor detects the leaf and provides real-time leaf temperature readings, along with a continuous leaf VPD reading - a direct insight into plant health, in the app. {% endstep %} {% endstepper %} ### The i**deal difference between leaf temperature and ambient temperature** For optimal plant health, your leaf temperature should typically be 1-3°C (2-5°F) cooler than the ambient air temperature. This indicates that the plant is actively transpiring and cooling itself through evaporation. If the leaf temperature is equal to or warmer than ambient temp, your plant may not be transpiring efficiently. This could be due to: * Low humidity (causing stomata to close). * Excessive light or heat stress. * Insufficient airflow. * If the leaf temperature is a lot lower than the ambient, your plant may be transpiring too aggressively, leading to excess water loss and potential nutrient issues. {% hint style="info" %} **Key Insight:** Adjust environmental factors like humidity, airflow, and light intensity to maintain the ideal leaf-to-air temperature difference for healthy transpiration and nutrient uptake. {% endhint %} ### **Leaf VPD Targets** Live Leaf VPD (Vapor Pressure Deficit) is a game-changer for plant health and monitoring. It directly impacts how efficiently your plants transpire and uptake nutrients. **Here are the ideal Leaf VPD targets based on your feeding strategy:**
High EC Feeding (3.0 EC+) * Early Flower (Weeks 1-3): 0.6 - 0.8 kPa * Mid Flower (Weeks 4-6): 0.8 - 1.0 kPa * Late Flower (Weeks 7-10+): 1.0 - 1.2 kPa
Lower EC Feeding * Early Flower (Weeks 1-3): 0.7 - 0.9 kPa * Mid Flower (Weeks 4-6): 0.9 - 1.1 kPa * Late Flower (Weeks 7-10+): 1.1 - 1.3 kPa
{% hint style="info" %} **Key Insight**: Lower EC feeding requires a slightly higher VPD target to encourage better nutrient uptake, while high EC feeding benefits from lower VPD to prevent over-transpiration and nutrient imbalances. {% endhint %} ### W**hen NOT to Use the Leaf Temperature** * **Young plants (1-3 weeks old)** – Placing the sensor on small leaves can block too much light, which may slow early development. Instead, position the Grow Sensor next to the plant until the leaves are large enough. * **If leaves are too small to support the sensor** – Wait until the plant is established before using leaf temperature measurements. # How do I set up my substrate probe? # How do I charge my Grow Sensor? Charging your Grow Sensor is simple - just plug in the provided barrel connector, and it will begin charging. We include a long 5m cable, perfect for growers who want to route the cable into their grow space without disruption. If you prefer, you can also keep the sensor plugged in for continuous power, ensuring uninterrupted monitoring. If you need a longer cable reach out to us.
# How do I use the Grow Sensor App? The Grow Sensor App is packed with advanced but user-friendly features designed to help you effortlessly optimise your grow environment. To explore all its powerful tools and functionalities, [click this link to jump to the full breakdown](https://docs.google.com/document/d/1aPP2hTh4Qcg-TKOk6RpB5yBrL8dzmOhgo8bTjV2PRg4/edit?tab=t.0#heading=h.c79681l7ybyi).
# The Grow Sensor {% content-ref url="/pages/EtFaSr2O72xw716NHeJy" %} [What does the Grow Sensor’s button do?](/the-grow-sensor/what-does-the-grow-sensors-button-do) {% endcontent-ref %} {% content-ref url="/pages/yJmZS9JvIPVUzK0ylX6p" %} [How accurate is the Grow Sensor?](/the-grow-sensor/how-accurate-is-the-grow-sensor) {% endcontent-ref %} {% content-ref url="/pages/3aKv4THb1sWBuFwMLYFN" %} [How do I calibrate the Grow Sensor?](/the-grow-sensor/how-do-i-calibrate-the-grow-sensor) {% endcontent-ref %} {% content-ref url="/pages/4aum2Z4khCVcFNyhxgck" %} [Can the Grow Sensor be used outside?](/the-grow-sensor/can-the-grow-sensor-be-used-outside) {% endcontent-ref %} {% content-ref url="/pages/3GqGyIzrPELd4vwinuWn" %} [How many Grow Sensors do I need for my growing space?](/the-grow-sensor/how-many-grow-sensors-do-i-need-for-my-growing-space) {% endcontent-ref %} {% content-ref url="/pages/wmWcAWCzyDv4nn3wjqbN" %} [What is the Wi-Fi range of the Grow Sensor?](/the-grow-sensor/what-is-the-wi-fi-range-of-the-grow-sensor) {% endcontent-ref %} {% content-ref url="/pages/9LUTkJ2V8xCAkI47x8w6" %} [How long does the Grow Sensor battery last?](/the-grow-sensor/how-long-does-the-grow-sensor-battery-last) {% endcontent-ref %} {% content-ref url="/pages/aJMaqTWPHtGJp0mZecWt" %} [How to set up the Grow Sensor to measure leaf temperature?](/the-grow-sensor/how-to-set-up-the-grow-sensor-to-measure-leaf-temperature) {% endcontent-ref %} {% content-ref url="/pages/ZDzLtsu7wz1sWuVlp0bJ" %} [How to find your device / Grow Sensor ID?](/the-grow-sensor/how-to-find-your-device-grow-sensor-id) {% endcontent-ref %} {% content-ref url="/pages/8TtCvXzCVBP91ZKiqtx6" %} [Does the Grow Sensor log data offline?](/the-grow-sensor/does-the-grow-sensor-log-data-offline) {% endcontent-ref %} {% content-ref url="/pages/zA6zGEUTheSNbzy9GZCX" %} [Will the sensor inform me if the Wi-Fi connection fails?](/the-grow-sensor/will-the-sensor-inform-me-if-the-wi-fi-connection-fails) {% endcontent-ref %} {% content-ref url="/pages/Zr6VLM5zrQmpBwshV7B2" %} [Why does the Grow Sensor’s LED flash green periodically?](/the-grow-sensor/why-does-the-grow-sensors-led-flash-green-periodically) {% endcontent-ref %} {% content-ref url="/pages/FvVL1MgYIIjjsS3ydUj8" %} [Why is the Grow Sensor light flashing red when onboarding?](/the-grow-sensor/why-is-the-grow-sensor-light-flashing-red-when-onboarding) {% endcontent-ref %} # What does the Grow Sensor’s button do? The Grow Sensor is a compact yet powerful device with a range of functions at your fingertips. Its button allows you to navigate key features effortlessly. For a full breakdown of button functions and flow diagrams, [click here](https://www.figma.com/board/WWU8B2Y140AZug7zJ6ojpW/Grow-Sensor-customer-button-flow?node-id=0-1\&t=1AYRtf3VV67pDGgF-1). ### H**ow do I take an immediate reading with the Grow Sensor?** Simply hold down the button until you see a continuous green light, then release it. This triggers an instant live reading - perfect for quickly checking conditions while you're in your grow room. ### H**ow do I put the Grow Sensor into live mode?** Soon you will be able to put the grow sensor into live mode to get extra fast readings. Watch this space. ### H**ow do I turn on the Grow Sensor?** If your Grow Sensor has completely run out of battery or has been manually turned off, simply press the button to power it back on. You'll see a steady green light, indicating that it's awake and ready to go. For a full breakdown of button functions, check out the complete flow diagrams here: [Grow Sensor button flow](https://www.figma.com/board/WWU8B2Y140AZug7zJ6ojpW/Grow-Sensor-customer-button-flow?node-id=0-1\&t=1AYRtf3VV67pDGgF-1) ### H**ow do I turn off the Grow Sensor?** To power down the Grow Sensor, press and hold the button until the LED turns red, then release it. The sensor will shut off completely. When you're ready to use it again, simply press the button once to wake it up. ### H**ow do I put the Grow Sensor into Wi-Fi mode?** To enter Wi-Fi onboarding mode, press and hold the button until the LED turns blue, then release it. The sensor is now ready to be set up using the Grow App. If you need help or run into any issues, feel free to reach out to us at For a full breakdown of button functions, check out the complete flow diagrams here: [Grow Sensor button flow](https://www.figma.com/board/WWU8B2Y140AZug7zJ6ojpW/Grow-Sensor-customer-button-flow?node-id=0-1\&t=1AYRtf3VV67pDGgF-1) ### W**hy is the Grow Sensor flashing white when I press the button?** A flashing white LED means the Grow Sensor is busy processing data. Give it 15 to 30 seconds, then try again - it should be ready to respond. For a full breakdown of button functions, check out the [complete flow diagrams here](https://www.figma.com/board/WWU8B2Y140AZug7zJ6ojpW/Grow-Sensor-customer-button-flow?node-id=0-1\&t=1AYRtf3VV67pDGgF-1).
# How accurate is the Grow Sensor? The Grow Sensor is designed for precision, providing highly accurate data to help you fine-tune your growing environment. ### E**nvironmental accuracy:** * Temperature: ±0.5°C (1°F) | Range: -9°C to 58°C (15.8°F to 136°F) * Humidity: ±1.3% | Range: 10% to 95% RH * Leaf Temperature: ±0.5°C (1°F) | Range: -30°C to 100°C (-22°F to 212°F) ### C**O₂ monitoring:** * Measurement Range: 400 ppm to 5000 ppm * Accuracy: ±40 ppm + 5% ### L**ight & spectrum accuracy:** * DLI (Daily Light Integral): ±3% * Spectral Sensor: * Wavelength Range: 380 to 910 nm * ePPFD (ePAR) Range: 400 to 750 nm * Blue Spectrum: 400 to 499 nm * Green Spectrum: 500 to 599 nm * Red Spectrum: 600 to 699 nm * Infrared Spectrum: 700 to 799 nm * Wavelength Accuracy: Typically ±2 nm per channel
With this level of precision, the Grow Sensor ensures you have reliable data to optimise your grow space with confidence.
# How do I calibrate the Grow Sensor? {% content-ref url="/pages/9giShOaortvlLitJ7tCB" %} [Does the Grow Sensor come pre-calibrated?](/the-grow-sensor/how-do-i-calibrate-the-grow-sensor/does-the-grow-sensor-come-pre-calibrated) {% endcontent-ref %} {% content-ref url="/pages/lGAaRVCHNXrXx32gTjB2" %} [How do I calibrate the humidity sensor?](/the-grow-sensor/how-do-i-calibrate-the-grow-sensor/how-do-i-calibrate-the-humidity-sensor) {% endcontent-ref %} {% content-ref url="/pages/NcGnRjEoEGtQXIF7I43C" %} [How do I calibrate the CO2 sensor?](/the-grow-sensor/how-do-i-calibrate-the-grow-sensor/how-do-i-calibrate-the-co2-sensor) {% endcontent-ref %} {% content-ref url="/pages/uteoFm0okL7C3trMotQu" %} [Do I need to calibrate any other sensors?](/the-grow-sensor/how-do-i-calibrate-the-grow-sensor/do-i-need-to-calibrate-any-other-sensors) {% endcontent-ref %} {% content-ref url="/pages/wFed8F7iY5o6Y6PBsB6A" %} [Can I set offsets to help with calibration?](/the-grow-sensor/how-do-i-calibrate-the-grow-sensor/can-i-set-offsets-to-help-with-calibration) {% endcontent-ref %} # Does the Grow Sensor come pre-calibrated? Yes! Every Grow Sensor is professionally calibrated before it ships, ensuring you receive an accurate and reliable device straight out of the box. Precision is our top priority. We go to great lengths to guarantee that your sensor delivers trustworthy data so you can confidently use it in your grow space from day one - no extra calibration required. This commitment to accuracy sets us apart from the competition.
# How do I calibrate the humidity sensor? Your Grow Sensor is factory-calibrated for high accuracy right out of the box, so in most cases, no additional calibration is needed. However, if you notice slight variations, calibration can help fine-tune accuracy. ### W**hy not use the salt test?** While the salt test is a common DIY method, it’s notoriously unreliable and difficult to execute precisely. An inaccurate reference point can lead to incorrect calibration - which may be worse than no calibration at all. Instead, we recommend using a [Boveda One-Step Hygrometer Calibration Kit](https://store.bovedainc.com/products/calibration-kit) for the most precise and repeatable results. ### H**ow to calibrate humidity using a Boveda kit** {% stepper %} {% step %} **Place your Grow Sensor inside the calibration bag** Use a Boveda 75% One-Step Hygrometer Calibration Kit, which can be found online for under £10. {% endstep %} {% step %} **Seal the bag and leave it undisturbed for 48–72 hours** Keep it in a stable environment with minimal temperature fluctuations. {% endstep %} {% step %} **Adjust the calibration in the app** If the reading is slightly off, use the app’s calibration settings to fine-tune it to 75.0% RH. {% endstep %} {% endstepper %} {% hint style="info" %} **Pro Tip:** Keep your calibration kit sealed when not in use. It can be reused for at least three months to re-verify accuracy. {% endhint %} ### **Important notes** * **Only calibrate if necessary** – The Grow Sensor is highly accurate out of the box. Adjustments should only be made if a verified reference shows a discrepancy. * **Make small adjustments** – Calibration is intended to correct minor variations (typically within ±5% RH). If your readings are significantly off, there may be an issue with the calibration process or sensor. * **Temperature and humidity calibrations are separate** – You can calibrate one or both independently, depending on what’s needed. If you're seeing large discrepancies or need help calibrating, contact us at we’re happy to help! # How do I calibrate the CO2 sensor? ### Why is CO₂ calibration important? Over time, CO₂ sensors naturally drift, leading to inaccurate readings. To ensure precise data and optimal plant growth, we recommend calibrating your Grow Sensor’s CO₂ sensor every six months. #### What happens if you don’t calibrate? * Overestimated or underestimated CO₂ levels can lead to inefficient CO₂ supplementation, wasting resources or stunting plant growth. * Incorrect readings may cause poor climate control adjustments, reducing yield and plant health. Regular calibration ensures accurate CO₂ monitoring, allowing for better environmental control and improved plant performance. ### How to calibrate your grow sensor’s CO₂ sensor Before you start: {% stepper %} {% step %} **Choose the right calibration environment** Calibrate outdoors in fresh air, away from traffic, buildings, or direct sunlight. Outdoor air typically contains \~420 ppm CO₂, providing a reliable baseline. {% endstep %} {% step %} **Check battery levels** Ensure your Grow Sensor has enough battery to complete the process. {% endstep %} {% step %} **Avoid enclosed spaces** Do not calibrate indoors, in a greenhouse, or near plants, as CO₂ levels may be artificially elevated. {% endstep %} {% endstepper %} ### Step-by-step CO₂ calibration process {% stepper %} {% step %} **Move the Grow Sensor outdoors** Find an open-air location, away from buildings and direct sunlight. {% endstep %} {% step %} **Press and release the button when the LED turns purple** This enters CO₂ calibration mode. {% endstep %} {% step %} **Wait for the purple LED to flash for up to 60 seconds** The sensor is preparing to calibrate. {% endstep %} {% step %} **Press and release the button again within 60 seconds** The purple LED will flash faster, indicating {% endstep %} {% step %} **Calibration begins:** * Fast-flashing green LED (30 seconds) – The sensor is actively calibrating. * Fast-flashing red LED (30 seconds) – The calibration process is completing. {% endstep %} {% step %} **Calibration complete** The LED will flash white once, confirming successful calibration. {% endstep %} {% step %} **Return the Grow Sensor to your grow environment** Press the button to wake it up. {% endstep %} {% endstepper %} For a full breakdown of button functions, check out the [complete flow diagrams here](https://www.figma.com/board/WWU8B2Y140AZug7zJ6ojpW/Grow-Sensor-customer-button-flow?node-id=0-1\&t=1AYRtf3VV67pDGgF-1). ### **Troubleshooting CO₂ calibration issues** #### **What if the calibration fails?** If calibration fails, the red LED will continue flashing instead of flashing white at the end. #### Possible causes & solutions: * **Calibrated in an enclosed or CO₂-rich environment** → Move the sensor to an open outdoor space and try again. * **Calibration was interrupted** → Restart the process from step 1. * **Battery too low** → Charge the sensor and attempt calibration again. #### **How do I cancel a calibration?** To abort the calibration process, press and hold the button for 5 seconds. The sensor will return to normal operation. #### **What happens if I forget the sensor outside?** Your Grow Sensor will automatically wake up and resume normal readings. However, prolonged outdoor exposure isn’t recommended, so be sure to bring it back inside once calibration is complete. Still have questions? Contact us at we’re happy to help!
# Do I need to calibrate any other sensors? In short, no - additional calibration isn’t necessary. All temperature sensors, including ambient and leaf temperature, are professionally factory-calibrated and designed to maintain long-term accuracy. However, if you ever need fine-tuning, we provide optional calibration offsets for both ambient and leaf temperature and CO₂ within the Grow Sensor app. For most growers, no further adjustments are required - your Grow Sensor is ready to deliver precise readings straight out of the box.
# Can I set offsets to help with calibration? Yes! While the Grow Sensor’s temperature sensors are factory-calibrated for long-term accuracy, we provide optional offsets for ambient temperature and leaf temperature as well as CO₂. This allows you to fine-tune readings if needed for your specific setup. For most growers, no adjustments are required, but the option is there if you ever need to make slight corrections.
# Can the Grow Sensor be used outside? The Grow Sensor can be used in greenhouses and polytunnels, but it’s not designed for full outdoor exposure. Since it’s not waterproof, we recommend bringing it indoors during winter or in harsh weather conditions to protect it from moisture and extreme temperatures.
# How many Grow Sensors do I need for my growing space? For home growers, one Grow Sensor per grow tent is usually enough. However, the more sensors you have, the more detailed your data will be. Some growers place multiple sensors at different heights - one high, one in the middle, and one at the bottom, to get a full picture of their environment. While this level of detail can be fascinating, it’s not essential for everyone. For larger grows and commercial facilities, we recommend deploying Grow Sensors strategically to ensure comprehensive environmental monitoring: * **Substrate monitoring** – One substrate sensor per 100 square feet (≈9.3 m²) of canopy or per irrigation zone. * **Environmental monitoring** – One Grow Sensor per grow room, with a minimum of one sensor per 600 square feet (≈55 m²) of canopy. Ultimately, the number of sensors depends on how much data resolution you want. More sensors provide more insights, allowing you to fine-tune your environment with greater precision.
# What is the Wi-Fi range of the Grow Sensor? The Wi-Fi range of the Grow Sensor depends on several factors, including wall thickness, obstacles, and router placement. In an open space, the range is approximately 200 meters, but this may vary based on your specific setup. For the best connectivity, place your router in a central location and minimise obstructions between the sensor and the Wi-Fi source. If you experience connectivity issues, a Wi-Fi extender may help improve coverage.
# How long does the Grow Sensor battery last? Battery life depends on the mode you select: * **Standard mode (default):** Lasts approximately 2 weeks on a single charge. * **Power-saving mode:** Reduces the frequency of readings from power-hungry sensors, extending battery life up to 10 weeks. ### **Low battery & offline data logging** When the battery drops to 5%, the Grow Sensor stops sending data but continues taking readings offline, ensuring you don’t lose any crucial data. You’ll receive low-battery notifications to remind you to recharge before this happens. If the battery fully depletes, simply press the button to wake up the sensor after recharging. ### Battery management Adjusting the settings in the battery management section can significantly extend your battery life. There are two key settings that influence this: #### 1. Sensor reading interval This determines how often the Grow Sensor takes a reading. By default, it’s set to every 3 minutes. Extending this interval to 10 minutes results in a substantial power saving, allowing the battery to last much longer. However, increasing the interval to 10 minutes means the sensor will only communicate with the app every 10 minutes. As a result, any changes you make - such as adjusting a temperature limit - won’t be applied until the next communication cycle. For instance, setting a temperature limit of 27°C won’t take effect or appear in the app until up to 10 minutes later. #### 2. High-power sensor sampling You can also adjust the sampling frequency of the more power-intensive sensors within the Grow Sensor. The device includes a range of sensors, but the CO2 sensor and soil probe are among the most power-hungry. When this power-saving option is enabled, these sensors only take readings once every four sampling intervals. For example, if the main sampling interval is set to 3 minutes, the CO₂ and soil sensors will provide data every 12 minutes (3 × 4 = 12). Need help? Contact us at we’re happy to help!
# How to set up the Grow Sensor to measure leaf temperature? Click [here](/getting-started/how-do-i-set-up-my-leaf-temperature-sensor) to head to the leaf surface temperature guide now.
# How to find your device / Grow Sensor ID? To locate your Grow Sensor ID, follow these steps:
{% stepper %} {% step %} Open your grow Settings in the app. {% endstep %} {% step %} Select Wi-Fi Settings. {% endstep %} {% step %} If your sensor is connected, you’ll see the Grow Sensor ID displayed on the first page. {% endstep %} {% endstepper %} # Does the Grow Sensor log data offline? Yes! Unlike many competitors, the Grow Sensor continues logging data even if your Wi-Fi or power goes down. This ensures continuous data collection with no gaps, so you never miss critical insights about your growing environment. Once reconnected, the sensor will sync and update your data seamlessly.
# Will the sensor inform me if the Wi-Fi connection fails? Yes! If your Wi-Fi goes down, you’ll receive a push notification - provided you’ve enabled notifications on your device. This ensures you're always aware of connectivity issues, allowing you to take action and keep your data flowing uninterrupted.
# Why does the Grow Sensor’s LED flash green periodically? The Grow Sensor’s LED flashes green each time it collects data and sends it to the server. This indicates that the sensor is actively monitoring your environment. **The flash is very faint and does not affect plant growth.**
# Why is the Grow Sensor light flashing red when onboarding? A flashing red light during onboarding means the sensor’s battery is flat. To charge your Grow Sensor, simply plug in the provided barrel power cable. Once it has enough power, you’ll be able to complete the onboarding process.
# The Grow App Find our more about the Grow Sensor app here. Download on the [Android Play Store](https://play.google.com/store/apps/details?hl=en\&id=com.growsensor.android.prod) | Download on the [IOS App Store ](https://apps.apple.com/gb/app/grow-sensor-read-the-room/id6473087688)\ \ Download for Android Download for Apple {% content-ref url="/pages/nu4CNt86hRp25rvp7zQw" %} [How do I use the Grow dashboard?](/the-grow-app/how-do-i-use-the-grow-dashboard) {% endcontent-ref %} {% content-ref url="/pages/2d0sIvAiJq60X3iaxYfV" %} [How do I use the Grow graphs?](/the-grow-app/how-do-i-use-the-grow-graphs) {% endcontent-ref %} {% content-ref url="/pages/In2ARammHwPOl3TxZrNY" %} [How do I set my grow’s night and day photoperiods?](/the-grow-app/how-do-i-set-my-grows-night-and-day-photoperiods) {% endcontent-ref %} {% content-ref url="/pages/lAY0yLeRqP47IhAfgYks" %} [How do I set limits and alerts for graphs?](/the-grow-app/how-do-i-set-limits-and-alerts-for-graphs) {% endcontent-ref %} # How do I use the Grow dashboard? The dashboard gives you a clear, real-time snapshot of your grow environment, displaying all your sensor data in one concise list. It helps you spot issues fast so you can take action right away. {% content-ref url="/pages/RlMTeI0XzGi2ZL0VtRxm" %} [How alerts are displayed?](/the-grow-app/how-do-i-use-the-grow-dashboard/how-alerts-are-displayed) {% endcontent-ref %} {% content-ref url="/pages/em4d84HBttrXorRpaMYT" %} [What are grows?](/the-grow-app/how-do-i-use-the-grow-dashboard/what-are-grows) {% endcontent-ref %} {% content-ref url="/pages/ID3QKC5stT6ILFWbHjsg" %} [How to use dashboard trends?](/the-grow-app/how-do-i-use-the-grow-dashboard/how-to-use-dashboard-trends) {% endcontent-ref %} {% content-ref url="/pages/99Khz60lk67twZdNnY4z" %} [Can I rename a grow?](/the-grow-app/how-do-i-use-the-grow-dashboard/can-i-rename-a-grow) {% endcontent-ref %} {% content-ref url="/pages/fv0DZUubh3FwwCFIP33Z" %} [How do I close and start a new grow?](/the-grow-app/how-do-i-use-the-grow-dashboard/how-do-i-close-and-start-a-new-grow) {% endcontent-ref %} {% embed url="" %} # How alerts are displayed? * **Purple text** – A high or low limit has been reached. * **Red text –** A dangerously high or low limit has been reached. Immediate action may be needed. * **Green text** – Everything is within range, meaning either: * You haven’t set limits yet. * Your grow environment is perfectly dialled in - great job! The Grow Dashboard makes monitoring simple, so you can focus on growing healthier, more productive plants with confidence.
Include a video here
# What are grows? In the Grow App, each item on your dashboard is called a grow. A grow represents a complete plant cycle, from seed to harvest. Currently, each grow can contain one Grow Sensor, but in the future, you’ll be able to add multiple sensors to track different zones within the same grow. ### How grows work: * A grow starts when you plant a seed and ends at harvest. * Once a grow is complete, you can archive it and start a new one, allowing you to review past data and improve your next grow. * In future updates, you’ll be able to: * Add tags (e.g., “Started flowering on \[date]”) * Leave notes for reference * Analyse specific weeks of your grow for crop registration and better plant optimisation. **The key takeaway here is that a grow is one full plant cycle. When you’re done, review, analyse, archive, and start fresh - using past insights to grow even better next time!**
# How to use dashboard trends? If you’ve [set limits](https://docs.google.com/document/d/1aPP2hTh4Qcg-TKOk6RpB5yBrL8dzmOhgo8bTjV2PRg4/edit?tab=t.0#heading=h.ttenbgrkcwqk) for your grow, they’ll be displayed in a bar graph below each sensor value on your dashboard. These bars visually represent your defined limits and show exactly where your current readings fall within your chosen range. Each bar also includes a trend indicator, helping you quickly assess whether conditions are improving, worsening, or staying stable: * **Left or right arrow** – The issue is shifting in the given direction (either worsening or improving). * **White line** – The value is stable and not changing significantly. This at-a-glance view makes it easy to understand your grow's overall health. With just a quick look, you’ll know whether you need to take action or if everything is running smoothly, and you can relax, knowing your grow is in control. Need help? Contact us at we’re happy to help!
# Can I rename a grow? Yes! To rename your grow, follow these steps: {% stepper %} {% step %} Click on your grow in the dashboard. {% endstep %} {% step %} Tap the cog icon on the graph page in the top right corner. {% endstep %} {% step %} Select Grow Settings. {% endstep %} {% step %} Update the name and save your changes. {% endstep %} {% endstepper %} That’s it - your grow is now renamed!
# How do I close and start a new grow? To close a grow or start a new one, follow these steps: {% stepper %} {% step %} Click on your grow in the dashboard. {% endstep %} {% step %} Tap the cog icon in the top right corner. {% endstep %} {% step %} Select Grow Settings. {% endstep %} {% step %} Choose from three options: * **Close grow** – Archives your current grow for future reference. * **Close & start a new grow** – Archives your current grow and creates a new one with the same settings. * **Delete grow** – Permanently removes the grow from your records {% endstep %} {% endstepper %} This makes it easy to manage your grow cycles and keep track of past data for future improvements.
# How do I use the Grow graphs? The Grow Sensor graphs are a super powerful tool at the heart of the app, designed specifically for growers. They provide a clear, user-friendly way to analyse your grow data quickly and effectively. Let’s dive deeper into how to make the most of your data. {% content-ref url="/pages/gviPpjuFZdG7Ebq4Joat" %} [What graphs/data can I see?](/the-grow-app/how-do-i-use-the-grow-graphs/what-graphs-data-can-i-see) {% endcontent-ref %} {% content-ref url="/pages/cBYDsITh2FfCApObkKn6" %} [How do I interact with graphs?](/the-grow-app/how-do-i-use-the-grow-graphs/how-do-i-interact-with-graphs) {% endcontent-ref %} {% content-ref url="/pages/fgerRzS63IyFdoHtEAv0" %} [How often does the graph data update?](/the-grow-app/how-do-i-use-the-grow-graphs/how-often-does-the-graph-data-update) {% endcontent-ref %} {% content-ref url="/pages/4lT5ddDeH9zvPIxQEW3V" %} [Can I filter graphs?](/the-grow-app/how-do-i-use-the-grow-graphs/can-i-filter-graphs) {% endcontent-ref %} {% content-ref url="/pages/4otLI3fjfk7KQnmOgrgr" %} [When does the eDLI (Daily Light Integral) graph reset?](/the-grow-app/how-do-i-use-the-grow-graphs/when-does-the-edli-daily-light-integral-graph-reset) {% endcontent-ref %} {% content-ref url="/pages/MZJkrm3m82xiovNmTIK2" %} [How do I use the light spectrum graph in the app?](/the-grow-app/how-do-i-use-the-grow-graphs/how-do-i-use-the-light-spectrum-graph-in-the-app) {% endcontent-ref %} {% content-ref url="/pages/bNomkUQUuM4sj9FAa5ZZ" %} [What is leaf VPD, and can I see this in the graphs?](/the-grow-app/how-do-i-use-the-grow-graphs/what-is-leaf-vpd-and-can-i-see-this-in-the-graphs) {% endcontent-ref %} # What graphs/data can I see? You can view detailed graphs for everything the Grow Sensor measures and more. These insights help you track trends, spot potential issues early, and fine-tune your grow environment for healthier plants and bigger yields. ### Here’s the data that the Grow Sensor displays * Temperature graph * Humidity graph * CO₂ graph * VPD (Vapour Pressure Deficit) graph * Leaf VPD graph * Leaf temperature graph * Leaf temperature offset graph * ePPFD (Extended Photosynthetic Photon Flux Density) graph * Daily Light Integral (DLI) graph * Dew point gap graph * Substrate temperature graph * Substrate moisture graph * EC (Electrical Conductivity) graph The Grow Sensor’s powerful, real-time graphs allow you to track all these metrics, helping you optimise your environment and grow with confidence.
# How do I interact with graphs? Unlike our competitors, the Grow App's graphs are fully interactive, making it easy to explore your data in real time. * Scroll through the list of graphs to access individual sensor data. * Pan across the timeline to focus on specific dates or times. * Pinch to zoom in or out for a detailed or broader view of trends. * Use shortcuts to instantly switch between hour, day, night, month, and year views for quick insights. * Tap the graph to load a data pointer. This will show the exact reading at that moment, along with any limits you've set. The Grow App makes reviewing your data fast and effortless. It has zero loading times, and you don't need to rotate your phone or navigate hidden menus. Every interaction is designed for smooth, instant access to the insights that matter most. Here's a video of the graphs in action: {% embed url="" %}
# How often does the graph data update? The update frequency depends on the mode your Grow Sensor is in. In standard mode (default), readings are taken every 3 minutes. Soon you will be able to put the sensor into live mode which will take readings extra fast. Check back here soon for more info on that. {% hint style="info" %} **Future updates:** As of March 3, 2025, we're developing new power-saving modes that will allow users to customise power consumption and data collection frequency. {% endhint %}
# Can I filter graphs? ​Yes! You can easily filter your graphs to display only the data you need. Simply click on the filter icon on your Graph page and select which graphs you’d like to view. {% hint style="info" %} **Coming soon:** In future updates, you'll also be able to reorder graphs for a fully customised dashboard experience. {% endhint %}
# When does the eDLI (Daily Light Integral) graph reset? The daily light integral graph provides a live cumulative total of your eDLI over a 24-hour period, helping you ensure your plants receive the correct amount of light for optimal growth. The total resets every 24 hours. If your grow has a photoperiod (light/dark cycle), the reset occurs in the middle of the dark period. If you're running 24-hour lighting with no dark period, the reset happens at midnight based on your location. This ensures accurate tracking, no matter your lighting schedule. {% embed url="" %} # How do I use the light spectrum graph in the app? The Grow App currently displays the light spectrum graph as time series data, allowing you to track how the spectrum changes over a 24-hour period. This is especially useful if you're adjusting your light spectrum throughout the day - you’ll see those changes reflected in the graph in real time. {% hint style="info" %} **Coming soon:** We’re working on adding a traditional snapshot view of the spectrum, which will be available in your grow Settings for a snapshot view of your light spectrum at any given moment. {% endhint %} Add video
# What is leaf VPD, and can I see this in the graphs? Yes! The Grow Sensor continuously measures Leaf VPD using its leaf temperature sensor, located on the bottom of the device. Leaf VPD is a key indicator of plant health, helping you optimise your grow environment for better yields. Leaf VPD (Vapour Pressure Deficit) measures the difference between moisture inside the leaf and the surrounding air. This directly affects: * **Transpiration efficiency** – How well the plant releases moisture. * **Nutrient uptake** – Ensuring plants absorb what they need. * **Growth rate & health** – Maintaining the ideal humidity-to-temperature balance. You’ll find Leaf VPD as a dedicated graph in your Grow App, giving you real-time insights into your plants’ transpiration and overall health. Add video
# How do I set my grow’s night and day photoperiods? To set your night and day photoperiods, follow these steps: {% stepper %} {% step %} Navigate to your grow’s settings. {% endstep %} {% step %} Select "Limits and Alerts. {% endstep %} {% step %} At the top of this screen, you’ll find the photoperiod controls. {% endstep %} {% step %} Click "Enable" and enter your lights on and lights off times {% endstep %} {% endstepper %} Once enabled, your photoperiods will split your alerts into day and night sections. If photoperiods are disabled, you’ll have a single continuous set of limits and alerts. {% hint style="info" %} **Important note:** When photoperiods are active, there’s a 20-minute transition window between night and day shifts. {% endhint %} During this period, the Grow Sensor takes the highest and lowest limit across both settings and will alert you if a limit is reached (provided push notifications are enabled) Any questions, contact us at . Add video
# How do I set limits and alerts for graphs? Limits are a powerful feature used throughout the app to help you monitor and optimise your grow. ### Why are limits important? * They control colours, alerts, and trends on your dashboard. * They trigger notifications when an issue arises. * They appear on graphs as coloured lines, providing a clear visual guide to see how close your readings are to your set limits. ### How do limits work on graphs? When you set a limit, it is displayed as a coloured line on your graph. This makes it easy to track fluctuations and ensure your environment stays within the ideal range Any time you adjust a limit, the change is reflected in the graph from that point forward, giving you a historical record of all limit adjustments throughout your grow. ### Why is this useful? This is especially valuable for crop registration, as it allows you to review every environmental change made during the grow cycle. Ever wondered if you maintained the right humidity and temperature when it mattered most? Now, you can check - with a complete visual history at your fingertips for every graph in the app. {% content-ref url="/pages/e5ADIFr0IukKPFJtwb7c" %} [How do I set high/low and dangerously high/low limits?](/the-grow-app/how-do-i-set-limits-and-alerts-for-graphs/how-do-i-set-high-low-and-dangerously-high-low-limits) {% endcontent-ref %} {% content-ref url="/pages/gXvHLVMys6Qk1VUA3fTT" %} [Can I create limit templates or recipes?](/the-grow-app/how-do-i-set-limits-and-alerts-for-graphs/can-i-create-limit-templates-or-recipes) {% endcontent-ref %} {% content-ref url="/pages/VJDZ1DIijhawZ2Kzgd5d" %} [How do I activate push notifications?](/the-grow-app/how-do-i-set-limits-and-alerts-for-graphs/how-do-i-activate-push-notifications) {% endcontent-ref %} {% content-ref url="/pages/8iFtkbJqEHdQsVQP5JdG" %} [If you’re not receiving notifications](/the-grow-app/how-do-i-set-limits-and-alerts-for-graphs/if-youre-not-receiving-notifications) {% endcontent-ref %} {% content-ref url="/pages/ncBsU54kJpeb2ooMhScy" %} [What limits can I set?](/the-grow-app/how-do-i-set-limits-and-alerts-for-graphs/what-limits-can-i-set) {% endcontent-ref %} {% content-ref url="/pages/X9IPAqV2JuXJQ11ltBWL" %} [How do I set lights on and lights of alerts?](/the-grow-app/how-do-i-set-limits-and-alerts-for-graphs/how-do-i-set-lights-on-and-lights-of-alerts) {% endcontent-ref %} {% content-ref url="/pages/t0cW5ILmdpy3EaMSmF30" %} [How does the eDLI limit work?](/the-grow-app/how-do-i-set-limits-and-alerts-for-graphs/how-does-the-edli-limit-work) {% endcontent-ref %} {% content-ref url="/pages/L8uTgCGVzVS9XEis1bjh" %} [How does the dew point limit work?](/the-grow-app/how-do-i-set-limits-and-alerts-for-graphs/how-does-the-dew-point-limit-work) {% endcontent-ref %} # How do I set high/low and dangerously high/low limits? Setting limits helps you stay in control of your growing environment by providing alerts and visual cues when conditions shift outside your ideal range. ### **How to set limits:** {% stepper %} {% step %} Click on your grow in the dashboard. {% endstep %} {% step %} Tap the cog icon in the top right corner. {% endstep %} {% step %} Select "Limits and Alerts." {% endstep %} {% step %} You’ll see a collapsed list of all available limits. If you've enabled night and day photoperiods, you’ll have two sets of limits - one for day and one for night. {% endstep %} {% step %} Click on a limit to expand the settings. {% endstep %} {% endstepper %} ### **What you can adjust:** For each parameter, you can set: * **High limit & low limit** – Triggers an early warning when values rise above or below your set threshold. * **Dangerously high and dangerously low limit** – Signals urgent action is needed. * **"Alert Me" toggle** – Enable this to receive push notifications when a limit is breached. ### **Customising limits to your grow style** How you use limits is entirely up to you; every grower is different. Some prefer tight limits for early warnings, while others only want notifications for dangerously high or low readings, using standard limits as a visual guide. Experiment and find what works best for your setup! Need help? Contact us at . Add video
# Can I create limit templates or recipes? **Not yet - but soon!** We’re working on a feature that will allow you to select, preview, and apply tested and proven grow recipes to your grow. This means you’ll be able to set ideal limits effortlessly and simply focus on keeping your environment within the recommended range. Easy, repeatable, and optimised for success You’ll be able to choose from: * **Veg & flower stage recipes** – Pre-set environmental conditions tailored for each growth phase. * High & low EC feeding recipes – Optimise nutrient levels for different feeding strategies. * **Specialty recipes** – Designed for inducing colour, achieving top-shelf quality, or even saving energy while maintaining great results. {% hint style="info" %} **Stay** **tuned** - this feature is coming soon! {% endhint %} # How do I activate push notifications? To enable push notifications for your Grow Sensor, follow these steps: {% stepper %} {% step %} Click on your grow in the dashboard. {% endstep %} {% step %} Tap the cog icon in the top right corner. {% endstep %} {% step %} Select "Limits and Alerts." {% endstep %} {% step %} Open a limit you want to monitor. {% endstep %} {% step %} Toggle "Alert Me" to enable push notifications.
{% endstep %} {% endstepper %} ### **You can choose to receive alerts for:** * **High/low limits** – Early warnings when values move out of range. * **Dangerously high/low limits** – Urgent notifications when critical levels are reached. Once activated, you will receive real-time alerts, helping you stay ahead of any issues in your grow environment. # If you’re not receiving notifications If you didn’t enable push notifications during onboarding, you may need to manually allow them in your phone’s settings. * **For iOS:** Go to Settings > Notifications, find the Grow App, and ensure notifications are enabled. * **For Android:** Go to Settings > Apps & Notifications, select the Grow App, and toggle on Allow Notifications. # What limits can I set? You can set limits for a wide range of environmental factors to keep your grow conditions optimal. These include: * Temperature * Humidity * CO₂ * VPD (Vapour Pressure Deficit) * Leaf VPD * Leaf temperature * Leaf temperature offset * ePPFD (Extended Photosynthetic Photon Flux Density) * Daily Light Integral (DLI) * Dew point gap * Substrate temperature * Substrate moisture * EC (Electrical Conductivity) By setting these limits, you can create a controlled, efficient grow environment tailored to your plants' needs.
# How do I set lights on and lights of alerts? Setting lights-on and lights-off alerts is simple and helps you catch any unexpected lighting issues in your grow. ### How to set a lights-off alert (for unwanted light loss during the day) {% stepper %} {% step %} Click on your grow in the dashboard. {% endstep %} {% step %} Tap the cog icon in the top right corner. {% endstep %} {% step %} Select "Limits and alerts." {% endstep %} {% step %} Under the Day limits section, select ePPFD (which measures how much light your plants are receiving). {% endstep %} {% step %} Set a low or danger low limit to a very dim value (e.g., 10). {% endstep %} {% step %} Enable "Alert me" to receive a push notification. {% endstep %} {% endstepper %} If your lights turn off unexpectedly and ePPFD drops below this limit, you’ll get an instant alert. ### How to set a lights-on alert (for unwanted light exposure at night) {% stepper %} {% step %} Follow the same steps above, but select ePPFD under Night limits instead. {% endstep %} {% step %} Set a high or danger-high limit (e.g., 10). {% endstep %} {% step %} Enable "Alert me" to receive a push notification {% endstep %} {% endstepper %} If your plants receive more than 10 ePPFD of light during the night, you’ll be the first to know. ### Fine-tuning sensitivity This feature is fully adjustable to suit your setup. For example, if you’re growing in a greenhouse and the moonlight is triggering alerts, simply increase the night limit above the brightness of the moon. You can check your graph data to determine the best threshold. If you have any questions, feel free to as us: Add video
# How does the eDLI limit work? In the Grow App, you can set a limit for your eDLI (Extended Daily Light Integral), which represents the total amount of PPFD your plants receive while the lights are on. ### How eDLI monitoring works * The Grow Sensor continually tracks eDLI using the light sensor and resets the value every 24 hours. * This ensures you always have an accurate, up-to-date reading whenever you check your graphs. * If your grow has a photoperiod (light/dark cycle), the reset happens in the middle of the dark period. * If you're running 24-hour lighting with no dark period, the reset occurs at midnight based on your location. ### Setting eDLI limits You can set a high eDLI limit, which notifies you when your plants have reached their target light threshold for the day. This helps you manage light exposure, prevent excess stress, and optimise growth.
# How does the dew point limit work? The Grow Sensor dew point limit is designed to make monitoring humidity stress simple and intuitive. Instead of requiring complex calculations, you just set how close to the dew point you want to be alerted. ### How it works: * The sensor automatically calculates the dew point based on temperature and humidity. * You set a limit to determine when you’ll receive an alert. * For example, if you set the limit to 1°C, you’ll be notified when the ambient temperature is 1°C away from the dew point - helping you prevent condensation and mould risks before they become a problem. ### Dew point graph The dew point graph visually displays: * How close you are to the dew point in real time. * The limit you’ve set, so you can track trends and make adjustments as needed.
With the Grow Sensor, no dew point calculations are needed - just set your limit and let the sensor do the work.
# Substrate probes {% content-ref url="/pages/jjloWYQAxuVDD4uBcHiI" %} [What soil probes are compatible with the Grow Sensor?](/substrate-probes/what-soil-probes-are-compatible-with-the-grow-sensor) {% endcontent-ref %} {% content-ref url="/pages/CYbFvVKGRRdEmUOovOKL" %} [Which sensors should I purchase?](/substrate-probes/which-sensors-should-i-purchase) {% endcontent-ref %} {% content-ref url="/pages/NmkZQ6VKKDj5meJwn8ry" %} [What do the substrate probes measure?](/substrate-probes/what-do-the-substrate-probes-measure) {% endcontent-ref %} {% content-ref url="/pages/YahZHG4KZmpA0BRnO6VR" %} [Can I change my substrate type in the Grow App?](/substrate-probes/can-i-change-my-substrate-type-in-the-grow-app) {% endcontent-ref %} {% content-ref url="/pages/dhLKbwlFNmYzvb9X43Ah" %} [How do I connect a substrate probe to the Grow Sensor using the SDI-12 connector block?](/substrate-probes/how-do-i-connect-a-substrate-probe-to-the-grow-sensor-using-the-sdi-12-connector-block) {% endcontent-ref %} {% content-ref url="/pages/26Hylqj8TVb0oJPRV8RK" %} [How many substrate probes can I use with the Grow Sensor?](/substrate-probes/how-many-substrate-probes-can-i-use-with-the-grow-sensor) {% endcontent-ref %} {% content-ref url="/pages/AKXT2N1NSn3BIwKMi1eR" %} [How do I position my soil probe for my pot size?](/substrate-probes/how-do-i-position-my-soil-probe-for-my-pot-size) {% endcontent-ref %} {% content-ref url="/pages/6DxZOddR9eU69nfPnKwN" %} [My VWC reading is too low or high, help!](/substrate-probes/my-vwc-reading-is-too-low-or-high-help) {% endcontent-ref %} # Can I plug a substrate probe directly into the Grow Sensor? Yes, if your substrate probe comes with a standard 3.5mm jack, you can plug it directly into the Grow Sensor—no adapter required. The sensor will automatically detect supported probes and start displaying readings such as EC, moisture, and temperature (depending on the probe model) in the Grow App.\ \ If your probe doesn’t include a 3.5mm jack, you’ll need a Grow Sensor Connector Cable to interface with the device. This cable is designed to make other probe types compatible with the sensor and ensure accurate data transmission.
# What soil probes are compatible with the Grow Sensor? The Grow Sensor is designed to work with a wide range of substrate sensors, ensuring an open and flexible ecosystem. Unlike many closed-system products, we believe in giving growers the freedom to choose the best tools for their needs. To use a substrate sensor, you’ll need to purchase our affordable soil probe adaptor cable. Once connected, you can integrate any of the following probes with your Grow Sensor: ### **Compatible substrate sensors** #### **Coming soon:** * **The Grow SUB Sensor** – Our own cost-effective substrate sensor, currently in development, designed specifically for the European market. #### **Available now:** * [**Grow SubSense**](https://shop.growsensor.co/products/subsense-substrate-sensor) - Our high-quality substrate sensor, available on our shop now, * [**Delta-T Wet 150**](https://delta-t.co.uk/product/wet150-horticulture/) – A high-quality, renowned soil and coco substrate sensor designed in the UK. Contact Delta-T directly to purchase. * [**Meter Group Teros 12**](https://metergroup.com/products/teros-12/) – Suitable for all substrate types, but only available for business customers. Distributed in multiple countries. * [**Acclima TDR-310W Sensor**](https://acclima.com/true-tdr-310w-soil-moisture-sensor/) – Works with all substrate types. Based in the US. Contact Acclima directly to purchase. * [**Acclima TDR-315N Sensor** ](https://acclima.com/tdr-315n-soil-moisture-sensor/)– Similar to the TDR-310W but designed for larger container sizes. Based in the US. Contact Acclima directly to purchase. * [**Grow Link Terra Link**](https://www.thehydrobros.com/products/terralink-soil-moisture-sensor-vwc-ec-temp?srsltid=AfmBOor-XdR-6XIbgrjuoMaodjOrswsoOdwXhdFsVIR1RsbE9pZU4azy) – Compatible with all substrate types. Based in the US and available for purchase online through grow shops or directly from Grow Link. ### **Future compatibility** We’re committed to expanding our range of compatible substrate sensors, offering both affordable and premium options to suit all growers. More probes and varying sensor types will be added soon.
# Which sensors should I purchase? This is a great question. All the sensors we support are high-quality options, but availability varies depending on your location * Some sensors are easier to source in certain regions. Check with distributors or manufacturers before purchasing. * If you're buying multiple sensors, stick with one brand and model in your setup. Different brands can have slight variations in readings, which may affect data consistency. If you’re unsure which sensor best suits your grow, reach out to us at and we’ll be happy to help.
# What do the substrate probes measure? All of our supported substrate probes measure three key factors, giving you valuable insights into your root zone. * **Water Content (VWC)** – Measures how much water is in your substrate, helping you fine-tune irrigation. * **Electrical Conductivity (pwEC)** – Indicates the salt/nutrient concentration in your substrate, ensuring optimal feeding levels. * **Substrate temperature** – Tracks how warm your substrate is, which affects root health and nutrient uptake. ### **Why is this important?** Measuring Water Content and pwEC is essential for crop steering. It allows you to make data-driven decisions about when to water and when to feed your plants. You can access dedicated graphs for each measurement in the Grow App, and set limits and alerts for all three to stay in complete control of your grow. # Can I change my substrate type in the Grow App? Yes! Some of our supported substrate sensors include specific algorithms for different substrate types, while others are designed to work with all substrates. If your chosen probe allows substrate selection (e.g., rockwool, coco, or soil, etc), you can change this setting in the calibration section within your Grow Settings. This ensures accurate readings tailored to your specific growing medium. # How do I connect a substrate probe to the Grow Sensor using the SDI-12 connector block? To connect a compatible SDI-12 substrate probe to your Grow Sensor, follow these steps: ### What you’ll need You’ll need to purchase the SDI-12 connector kit from our website. This includes: * 1 x SDI-12 connector block * 1 x RJ12 cable (included) ### Step-by-step setup {% stepper %} {% step %} **Connect the cable:** * Plug the RJ12 cable into the bottom port of your Grow Sensor. * Plug the other end of the RJ12 cable into your SDI-12 connector block. {% endstep %} {% step %} **Choose your wiring method based on your probe:** * **Option A: Bare wire probe** * If your substrate probe has three bare wires at the end: * Use a small flathead screwdriver to open the SDI-12 connector. There are notches on either side of the case—insert the screwdriver into a notch and gently twist to pop the case open. * Inside the connector, you’ll find three labeled screw terminals: * Power (typically red or brown) * Ground (typically black) * Data (typically white or yellow) * **Important**: Most soil substrate probes list the wire colours and their corresponding functions on their product page or datasheet. Please refer to this information and double-check before wiring to ensure you connect each wire to the correct terminal. * Insert the wires, tighten the terminal screws, and close the case. * **Option B: Probe with a headphone jack** * If your substrate probe has a 3.5mm headphone-style jack, you can: * **Option 1:** Cut off the jack, strip the wires, and follow the steps in Option A. * **Option 2:** Use a female headphone socket, wire that into the SDI-12 connector, and plug in the probe. {% endstep %} {% endstepper %} ### A quick note on durability We’ve designed the SDI-12 connector to be as affordable and accessible as possible. While the case can be opened and closed, it’s not built for repeated use. \ Once you’ve wired in your substrate probe correctly, we recommend keeping the connector closed permanently to avoid wear or potential damage. ### Final checks * Make sure your substrate probe is SDI-12 compatible and supported by the Grow Sensor. * Once connected, your probe should begin reporting substrate readings in the Grow Sensor app. * Open your grow in the app, go to Calibration settings, and select the correct substrate medium (e.g. soil, coco, rockwool) to ensure accurate readings. Let us know if you’d like a wiring diagram or setup video — we’re happy to help! # How many substrate probes can I use with the Grow Sensor? At the moment, you can connect one substrate probe directly to the Grow Sensor We’re working on an affordable hub that will allow you to connect multiple substrate probes to a single Grow Sensor, giving you even greater control and data resolution over your grow environment. {% hint style="info" %} Stay tuned for updates! {% endhint %}
# How do I position my soil probe for my pot size? Properly setting up your substrate sensor is essential for accurate and repeatable readings. Incorrect placement can lead to misleading moisture, EC, and temperature data, affecting your ability to make informed irrigation and feeding decisions. ### **Best practices for inserting a soil probe** {% stepper %} {% step %} **Keep prongs straight and level** * Always insert the prongs horizontally into the pot, not at an angle. * Angled placement causes inconsistent depth readings, as the tip of the probe will be lower than the entry point. * Multi-prong probes should be parallel to the soil surface, never inserted vertically, since moisture, EC, and temperature vary by depth. {% endstep %} {% step %} **Correct sensor height for reliable readings** Some probes are calibrated for specific insertion heights to measure conditions in the active root zone. Incorrect height placement can cause misleading data. * **Too high in the pot** – Measures topsoil, which dries out faster than deeper layers. * **Too low down in the pot** – Captures moisture and nutrients that may not be available to the plant’s roots. {% endstep %} {% step %} **Fully insert the sensor – No exposed prong** * Any part of the probe exposed to air will skew readings, particularly for moisture and EC. * If moisture and EC appear lower than expected, check that the entire probe is in contact with the substrate. {% endstep %} {% step %} ### **Do not remove the sensor once placed** * Reinserting a sensor disrupts the substrate, causing air pockets that affect permittivity and moisture and EC readings. * Leave the sensor in place for long-term, consistent monitoring. {% endstep %} {% step %} **Minimise air gaps around the probe** * Air pockets alter permittivity, which affects moisture and EC readings. * If the sensor is not inserted firmly, gaps may form, misleading the device into reading lower moisture levels. * After inserting the probe, gently press the substrate around it to ensure good contact (if possible) {% endstep %} {% endstepper %} ### **Why should the entire sensor stay inside the pot?** For the most accurate readings, the sensor body should remain inside the pot to reflect the actual environmental conditions affecting the plant’s roots. If any part of the sensor is exposed, external factors can distort data. ### Key reasons to keep the sensor inside the pot: 1. **Consistent temperature readings** – A sensor partially exposed to air may measure room temperature instead of substrate temperature, leading to inaccurate root zone data. 2. **Accurate moisture and EC measurements** – Exposed prongs may pick up dry air readings, making the substrate appear drier or lower in EC than it actually is. 3. **Prevents external interference** – Factors like air circulation, lighting, and nearby equipment can distort readings if the sensor is left outside the pot. 4. **Stable data over time** – Keeping the sensor fully inserted ensures consistent, repeatable data for better decision-making. ### **Substrate-specific considerations** Some substrates, like rockwool, are pre-formed and not designed for probe insertion. In these cases, placing the probe into the substrate is your only option. By following these best practices, you’ll ensure reliable, real-time substrate data, helping you optimise your watering and feeding strategy for better plant health and higher yields. {% content-ref url="/pages/HridEAZL1sm5vFiIQUNl" %} [Grow SubSense](/substrate-probes/how-do-i-position-my-soil-probe-for-my-pot-size/grow-subsense) {% endcontent-ref %} {% content-ref url="/pages/pEi4gAQ1ghwcWVQRZYvj" %} [Delta-T Wet 150](/substrate-probes/how-do-i-position-my-soil-probe-for-my-pot-size/delta-t-wet-150) {% endcontent-ref %} {% content-ref url="/pages/K6sYfKiIsBCzLGwruECh" %} [Meter group Teros 12](/substrate-probes/how-do-i-position-my-soil-probe-for-my-pot-size/meter-group-teros-12) {% endcontent-ref %} {% content-ref url="/pages/k4quKkYUgs1yxO6qrjXU" %} [Acclima TDR-310W](/substrate-probes/how-do-i-position-my-soil-probe-for-my-pot-size/acclima-tdr-310w) {% endcontent-ref %} {% content-ref url="/pages/aUNzycfyD1WmPJmpAzuS" %} [Acclima TDR-315N](/substrate-probes/how-do-i-position-my-soil-probe-for-my-pot-size/acclima-tdr-315n) {% endcontent-ref %} {% content-ref url="/pages/Kkp2qu1lZ1EaaCIQeE6X" %} [The Grow Link Terra Link](/substrate-probes/how-do-i-position-my-soil-probe-for-my-pot-size/the-grow-link-terra-link) {% endcontent-ref %} # How do I place the probe through the pot Properly positioning your substrate probe ensures accurate and consistent readings. Follow these steps to securely place the probe through the side of your pot while maintaining a stable, repeatable setup.
{% stepper %} {% step %} Measure the correct placement Use a ruler to determine the ideal insertion height based on your pot size and root zone depth. You can find that here. {% endstep %} {% step %} Create an access point in the pot * **Best method:** Cut a small section out of the pot’s side to allow the sensor to make direct contact with the substrate. * **Alternative:** If cutting is not an option, you can: * Drill small holes that align with the prongs. * Gently push the probes through the side of the pot if the material allows. {% endstep %} {% step %} Ensure the sensor is level * The sensor must be flat and parallel to the soil surface, not angled. * Incorrect positioning can skew moisture, EC, and temperature readings. {% endstep %} {% step %} Secure the probe in place * Carefully push the sensor into the substrate without forcing it. * The sensor should stay in place on its own. If it feels loose or wobbles, the substrate may be too dry or too loose and may need to be reset. * Fixing a loose sensor: * Tamp down the substrate gently around the probe. * If needed, water the plant to improve substrate contact. {% endstep %} {% endstepper %} By following these steps, you ensure optimal sensor placement, leading to more reliable and actionable data for your grow.
# How do I place the sensor in the pot? Proper sensor placement ensures accurate readings and long-term stability. Follow these steps to correctly position your substrate probe in the pot.
{% stepper %} {% step %} Prepare the substrate * Fill your pot with substrate up to the height where the sensor will be placed. * Gently tamp down the substrate to ensure it’s firm and level. Check that the height remains correct after tamping. {% endstep %} {% step %} Position the probe * Place the sensor in the centre of the pot for the most representative readings. * Ensure the prongs sit flat and level, not angled, for consistent moisture and EC measurements. {% endstep %} {% step %} Secure the sensor * Continue backfilling the pot with the substrate, ensuring the sensor stays in position. * Tamp down the substrate as you go to remove air pockets and ensure good contact with the probe. {% endstep %} {% step %} Manage the cable Loop the cable out of the top of the pot, keeping it secure and out of the way. {% endstep %} {% endstepper %} By following these steps, you’ll ensure stable, repeatable data collection, which will help you make more informed watering and feeding decisions.
# Grow SubSense Correct positioning of the SubSense probe ensures accurate and consistent measurements of moisture, EC, and temperature, helping you make informed irrigation and nutrient decisions. #### **Rockwool cubes and slabs** * Place the probe 1 inch from the bottom of the Rockwool cube or slab. * If using a Rockwool slab, position the probe equidistant between two plants to ensure balanced and representative readings. #### **Coco coir and organic substrates** The ideal placement varies based on pot size: * 1-gallon coco pots → 1 inch from the bottom * 2-gallon coco pots → 2 inches from the bottom * 3-gallon coco pots and larger → 3 inches from the bottom #### Large no-till or living soil beds Check out our FAQ for this specific use case below. {% content-ref url="/pages/QThzskvmoyhFm6W9FYs0" %} [How do I position my substrate probe in a large no-till or living-soil bed?](/substrate-probes/how-do-i-position-my-substrate-probe-in-a-large-no-till-or-living-soil-bed) {% endcontent-ref %} #### **Why proper probe placement matters** * Ensures precise substrate data for moisture, EC, and temperature. * Helps optimise watering and feeding schedules. * Provides consistent root-zone readings, leading to healthier plant growth. Still have questions? Contact us on . # Delta-T Wet 150 Proper placement of the Delta-T Wet 150 ensures accurate and consistent measurements of moisture, EC, and temperature, helping you optimise your grow conditions. ### **Rockwool cubes and slabs** * Place the probe 1 inch from the bottom of the rockwool cube or slab. * If using a rockwool slab, position the probe equidistant between two plants to capture the most representative readings of the growing environment. ### **Coco coir and organic substrates** The ideal placement depends on pot size: * 1-gallon coco pots → Place the probe 2 inches from the bottom. * 2-gallon coco pots and larger → Position the probe 3 inches from the bottom for the most accurate root-zone readings. #### Large no-till or living soil beds Check out our FAQ for this specific use case below. {% content-ref url="/pages/QThzskvmoyhFm6W9FYs0" %} [How do I position my substrate probe in a large no-till or living-soil bed?](/substrate-probes/how-do-i-position-my-substrate-probe-in-a-large-no-till-or-living-soil-bed) {% endcontent-ref %} ### **Why proper probe placement matters** * Ensures reliable moisture, EC, and temperature data. * Helps fine-tune irrigation and nutrient delivery. * Provides a clear picture of root-zone conditions, leading to healthier plants and better yields. Still have questions? Contact us on - we’ll be happy to help!
# Meter group Teros 12 Correct positioning of the Meter Group Teros 12 probe ensures accurate and consistent measurements of moisture, EC, and temperature, helping you make informed irrigation and nutrient decisions. ### **Rockwool cubes and slabs** * Place the probe 1 inch from the bottom of the Rockwool cube or slab. * If using a Rockwool slab, position the probe equidistant between two plants to ensure balanced and representative readings. ### **Coco coir and organic substrates** The ideal placement varies based on pot size: * 1-gallon coco pots → 1 inch from the bottom * 2-gallon coco pots → 2 inches from the bottom * 3-gallon coco pots and larger → 3 inches from the bottom #### Large no-till or living soil beds Check out our FAQ for this specific use case below. {% content-ref url="/pages/QThzskvmoyhFm6W9FYs0" %} [How do I position my substrate probe in a large no-till or living-soil bed?](/substrate-probes/how-do-i-position-my-substrate-probe-in-a-large-no-till-or-living-soil-bed) {% endcontent-ref %} ### **Why proper probe placement matters** * Ensures precise substrate data for moisture, EC, and temperature. * Helps optimise watering and feeding schedules. * Provides consistent root-zone readings, leading to healthier plant growth. Still have questions? Contact us on .
# Acclima TDR-310W Proper placement of the Acclima TDR-310W substrate probe ensures accurate and consistent measurements of moisture, EC, and temperature, helping you optimise your grow conditions. ### Rockwool cubes and slabs For accurate readings, place the probe at the following positions: * 4” x 4” x 4” cubes → 1 inch above the base * 6” x 6” x 4” cubes → 1 inch above the base * 6” x 6” x 6” cubes → 1 inch above the base * 8” x 8” x 8” cubes → 2 inches above the base * Rockwool slabs → 1 inch above the base in individual cubes If using a rockwool slab, position the probe equidistant between two plants to capture the most representative root-zone conditions. ### Coco coir and organic substrates Probe placement depends on pot size for the most accurate root-zone readings: * 1-gallon coco pots → 1 inch above the base * 2-gallon coco pots → 2 inches above the base * 3-gallon and larger coco pots → 3 inches above the base #### Large no-till or living soil beds Check out our FAQ for this specific use case below. {% content-ref url="/pages/QThzskvmoyhFm6W9FYs0" %} [How do I position my substrate probe in a large no-till or living-soil bed?](/substrate-probes/how-do-i-position-my-substrate-probe-in-a-large-no-till-or-living-soil-bed) {% endcontent-ref %} # Acclima TDR-315N Proper placement of the Acclima TDR-315N substrate probe ensures accurate and consistent measurements of moisture, EC, and temperature, helping you optimise your grow conditions. ### Rockwool cubes and slabs For accurate readings, place the probe at the following positions: * 8” x 8” x 8” cubes → 2 inches above the base If using a rockwool slab, position the probe equidistant between two plants to capture the most representative root-zone conditions. ### Coco coir and organic substrates Probe placement depends on pot size for the most accurate root-zone readings: * 3-gallon and larger coco pots → 3 inches above the base #### Large no-till or living soil beds Check out our FAQ for this specific use case below. {% content-ref url="/pages/QThzskvmoyhFm6W9FYs0" %} [How do I position my substrate probe in a large no-till or living-soil bed?](/substrate-probes/how-do-i-position-my-substrate-probe-in-a-large-no-till-or-living-soil-bed) {% endcontent-ref %} # The Grow Link Terra Link Proper placement of the Grow Link Terra Link substrate probe ensures accurate and consistent measurements of moisture, EC, and temperature, helping you optimise your grow conditions. ### **Rockwool cubes and slabs** * Place the probe 1 inch from the bottom of the Rockwool cube or slab. * If using a Rockwool slab, position the probe equidistant between two plants to get the most representative readings of the growing environment. ### **Coco coir and organic substrates** The ideal placement depends on pot size: * 1-gallon coco pots → Place the probe 2 inches from the bottom. * 2-gallon coco pots and larger → Position the probe 3 inches from the bottom for the most accurate root-zone readings. #### Large no-till or living soil beds Check out our FAQ for this specific use case below. {% content-ref url="/pages/QThzskvmoyhFm6W9FYs0" %} [How do I position my substrate probe in a large no-till or living-soil bed?](/substrate-probes/how-do-i-position-my-substrate-probe-in-a-large-no-till-or-living-soil-bed) {% endcontent-ref %} ### **Why proper probe placement matters** * Ensures consistent and accurate moisture, EC, and temperature data. * Helps you fine-tune irrigation and nutrient delivery. * Provides a clear picture of root-zone conditions, leading to healthier plants and better yields. Still have questions? Contact us on .
# How do I position my substrate probe in a large no-till or living-soil bed? Probe placement is key to getting reliable moisture and pore-water EC (PWeC) data. In large no-till or living-soil beds (12–24″ / 30–60 cm tall), vertical and horizontal positioning make a big difference. ### Best single-sensor placement Place the probe **25–35% of the bed height below the soil surface**.\ \ This corresponds to roughly: * 4″ / 10 cm deep in a 12″ (30 cm) bed * 5–6″ / 13–15 cm deep in an 18″ (45 cm) bed * 6–8″ / 15–20 cm deep in a 24″ (60 cm) bed This depth represents the **active root zone**, where the plant takes up most of its water and nutrients. It’s ideal for monitoring crop steering, drybacks, and irrigation timing. ### Two-sensor placement (recommended) Soon, the Grow Sensor PRO will support up to 2 substrate sensors per unit (28/10/25). If your bed allows for two sensors, you’ll get the most complete picture by tracking both the upper and lower moisture zones: * **Upper sensor (plant-active):** 25–35% of the bed height below the surface\ → **Used for crop steering and monitoring drybacks.** * **Lower sensor (drain/leach):** 3–4″ (8–10 cm) above the bed bottom\ → Used to **track salt build-up and leaching** near the base of the bed. Even in taller containers, placing the lower probe 3–4″ from the bottom keeps it just above the saturated zone, which forms at a similar height across most soil mixes. ### Horizontal position * Place the probe **halfway between plants and between emitters**, within the main wetted zone but **not directly under a dripper.** * Stay at least **4–6″ (10–15 cm) away from the bed’s fabric sidewalls** to avoid edge drying that can skew readings. ### Orientation * Insert the probe with the **prongs parallel to the soil surface**, level and fully buried. * Ensure **firm contact** with the soil — no air gaps. * Measure depth from the **mineral soil surface**, not from the top of any mulch layer. # My VWC reading is too low or high, help! If your Volumetric Water Content (VWC) readings seem incorrect, it may be due to sensor placement within the substrate. Proper positioning is key to obtaining accurate and reliable moisture measurements. ### **VWC reading too low** #### Possible cause: * The sensor is placed too high in the substrate, causing it to underestimate moisture levels. * The sensor's electrical current does not fully propagate through the substrate, leading to lower-than-expected readings. #### Solution: * Reposition the sensor lower in the substrate, closer to the root zone, to capture a more accurate moisture reading. ### **VWC reading too high** #### Possible cause: * The sensor is placed too low, near the bottom of the substrate, where excess water can pool. * The electrical current extends into the saturated zone, inflating moisture readings. #### Solution: * Move the sensor slightly higher to avoid detecting pooled water at the bottom. ### **Substrate-specific placement adjustments** * Coco coir retains water differently than rockwool, often leading to a higher saturation zone near the bottom. * To compensate, position the sensor one inch higher in coco than you would in rockwool to achieve more consistent and accurate VWC readings. By adjusting sensor placement based on your substrate type and root zone conditions, you’ll ensure accurate, repeatable moisture measurements, leading to better irrigation decisions and healthier plants.
# \*To do\* How do I crop steer? - don't forget to add back into Pubstrate probes index # App settings {% content-ref url="/pages/M1yxe1mGvOdWoObT3kh2" %} [How can I change my account email?](/app-settings/how-can-i-change-my-account-email) {% endcontent-ref %} {% content-ref url="/pages/1aPGLLFwLzQ7Tlka46dg" %} [How can I change my account password?](/app-settings/how-can-i-change-my-account-password) {% endcontent-ref %} {% content-ref url="/pages/Upj1CS01Vr5c08G7Krx7" %} [How can I change the measurement units in the app?](/app-settings/how-can-i-change-the-measurement-units-in-the-app) {% endcontent-ref %} {% content-ref url="/pages/CAZk0aTNXbggQZ4IhGbE" %} [How do I access the API?](/app-settings/how-do-i-access-the-api) {% endcontent-ref %} {% content-ref url="/pages/CnKltqFaQM18Qdps94OM" %} [How do I link the Grow Sensor with Home Assistant](/app-settings/how-do-i-link-the-grow-sensor-with-home-assistant) {% endcontent-ref %} {% content-ref url="/pages/xcHhn4I0gNMUDVWSXb4e" %} [Do you have team Grow account access?](/app-settings/do-you-have-team-grow-account-access) {% endcontent-ref %} {% content-ref url="/pages/jPlWr8cllI4h092f8bkA" %} [How can I opt in to test latest beta software and updates?](/app-settings/how-can-i-opt-in-to-test-latest-beta-software-and-updates) {% endcontent-ref %} # How can I change my account email? To update your account email, follow these steps: {% stepper %} {% step %} Open the Grow App. {% endstep %} {% step %} Tap the cog icon in the top right corner of the dashboard to access App Settings {% endstep %} {% step %} Select "Account." {% endstep %} {% step %} Update your email address. {% endstep %} {% step %} Click "Save." {% endstep %} {% endstepper %} Your email will now be updated in your account settings.
# How can I change my account password? To update your password, follow these steps: {% stepper %} {% step %} Open the Grow App. {% endstep %} {% step %} Tap the cog icon in the top right corner of the dashboard to access App Settings. {% endstep %} {% step %} Select "Account." {% endstep %} {% step %} Locate the "Update Password" field. {% endstep %} {% step %} Enter your new password and save your changes. {% endstep %} {% endstepper %} Your password will now be updated.
# \*To do\* Can I check the timezone in my app? - don't forget to add to App settings index Yes! Open your app and go to the app settings by clicking the cog in the top left corner of the dashboard. Click on configuration you can then adjust the time zone of all active grows. # How can I change the measurement units in the app? To adjust the measurement units in the Grow App, follow these steps: {% stepper %} {% step %} Open the Grow App. {% endstep %} {% step %} Tap the cog icon in the top right corner of the dashboard to access App Settings. {% endstep %} {% step %} Select "Configuration." {% endstep %} {% step %} Choose your preferred measurement units. {% endstep %} {% endstepper %} Your settings will update immediately to reflect your selected units.
# How do I access the API? API access is available upon request. Contact us at , and we’ll provide the details you need to get started.
# How do I link the Grow Sensor with Home Assistant \ **If you’d like a broader introduction before tackling these detailed steps, start with our overview page here:** Home [Assistant grow-room guide](https://www.growsensor.co/product/how-to-build-a-home-assistant-grow-room-no-diy-headaches). If not, jump right in here: {% stepper %} {% step %} Flash Home Assistant OS onto the SD card and put it into the RPI. (This is easily done by using (This is easily done by using Raspberry Pi Imager available here , choose the Home Assistant image option) ![](https://lh7-rt.googleusercontent.com/docsz/AD_4nXcX8VGRO_WQQKATD3YRXscwjqKJp6CnHAUz1MEBq_TCgdHLeBZE86QxzRA_6FS7gqhTdiFoeXZCsabQPS5aoEe3m9-0rrjiAz9H7Vmc5B9V9a7-wvJsTp_gKcEzWw8-WvHqwnFMjg?key=yp8JbPK_p8kjdiW9eNw4FA) {% endstep %} {% step %} Connect the RPi to the router with a network cable. Connect in browser at ![](https://lh7-rt.googleusercontent.com/docsz/AD_4nXfHTZjOvrxT3kFtAiKCR8vGoprw3Xy02_mrDZ_AOE_5vzVSkuTerWftnn26jeG0muwwlbkkMD4-GqXMyul2XDjCTMKtgOb4cYRIAexR-U8hwL7pyxssKAXAdayB99VS0cVmUUAXJw?key=yp8JbPK_p8kjdiW9eNw4FA) First time run takes its time! ![](https://lh7-rt.googleusercontent.com/docsz/AD_4nXd7SV9QGHwxu9Bg7XtX8Ss9EcZQSR1F1PuJYBy3aG5FNYNU1feXY7pFwlqVOTpKqjKzpnWDxySgyM0WySNoj0_f0VnkWZLwTQwtBOdURE6pVRlBe6x1sBnm8oYdn-c-1UA5565s?key=yp8JbPK_p8kjdiW9eNw4FA) {% endstep %} {% step %} Choose to create my Smart Home You’ll be prompted to create a user ![](https://lh7-rt.googleusercontent.com/docsz/AD_4nXdbOj4UFGeJtLyIuvhZp7BnNfOwJ_nWtjVqe9y_kOlRu9JIyHJfbFzk1rzbpgFK1zLKfo0hKKZkmsdN7iAC7AnDlUs5QoukNLxe-oYdTBQMBx-YxxZ_SK7ZaKtB0AXGRIXbglIL?key=yp8JbPK_p8kjdiW9eNw4FA) The fresh HA Overview will now look like this ![](https://lh7-rt.googleusercontent.com/docsz/AD_4nXdZQi_QJA0Zxfk2xEfA0rjkfwj_nC3f21bmSePVDQlJkY-BSID0zEgIzT1wbv2_WXhExbt4RcgwbbC_imYjga9YfgoJUbmn3vsscNQotDUY4LJJV5qwDGu9SiFG--jILfYTY9jb?key=yp8JbPK_p8kjdiW9eNw4FA) {% endstep %} {% step %} The grow sensor will connect to an MQTT broker that will run on the HA device. {% endstep %} {% step %} Install the MQTT broker on HA Go to Settings -> Add-ons -> Add-on Store Install the Mosquitto Broker Add-on and check it’s configured to start on boot. ![](https://lh7-rt.googleusercontent.com/docsz/AD_4nXf_wHiWqggzxwvLbPsVi0b-IkD_5dSGymBMm7U-D3r54Sw5elcPVWruVpUN-IRmRUqQqcgTWwiIWNzc1cbfP6lbDE84hB42se9XDL_0IRQKYGkqJxIDob1jpcnZgNtFwqNdQtkiPA?key=yp8JbPK_p8kjdiW9eNw4FA) Start the broker {% endstep %} {% step %} Configure the Grow Sensor (get one [here](https://shop.growsensor.co/products/the-grow-sensor-pro)) to connect to your HA MQTT broker using the Grow Sensor App. ![](https://lh7-rt.googleusercontent.com/docsz/AD_4nXee-CrzJxk6JOWV5pK_ldEuAI8UN88QYCp49oglpHTRyowXjo7BPfz_4Kq6py922eFzCafVvxmXRB27PdfhfdCff-d5Vd2bcLm09dVKwUwYS33HKqHoumRxRYep_0RT-dLglATTCw?key=yp8JbPK_p8kjdiW9eNw4FA) ![](https://lh7-rt.googleusercontent.com/docsz/AD_4nXemZUG1X26GKD_RcU7wDmY92rnjqqfvffZ5004ORMuI4kypaoQpIq3sfijxba0OJoBL5yoDoZfd5b-egPR_MYGmzYI1BXiLJR-KIYAguxFB6T1gau6IallsdSEL1NKIYOsJbh5wGQ?key=yp8JbPK_p8kjdiW9eNw4FA) ![](https://lh7-rt.googleusercontent.com/docsz/AD_4nXcUeS3Qkmae4P8EdWS0ydAzX36dFtm4AYGoqInXGYtFW8ChJJ2B0Ia3wTp4XVwX4Q3FTJ9xRY2SF966Taa3y5mQr_-IbxdlGUZf2NWEVLsKXmX9KN5MqntwTgy3Nu25hJSgopN7ag?key=yp8JbPK_p8kjdiW9eNw4FA) ![](https://lh7-rt.googleusercontent.com/docsz/AD_4nXcoz1FWDCGPbs55947bJZBaRxv937Y8XpKVupJgDtLuQqOZLNckwtIb6BObt3037Ovgeeq0L4hHQnEdk3VtSknRyKAnW4nwzgaRNWG05BD1DYwLkRaQqu8fCd3PXAKngOHf_jIgdw?key=yp8JbPK_p8kjdiW9eNw4FA) {% endstep %} {% step %} Set up MQTT integration in Home Assistant Configure the MQTT broker. Go to Settings -> Devices and Services. The installed MQTT add-on should have been discovered. Add it to your configuration by choosing ADD. ![](https://lh7-rt.googleusercontent.com/docsz/AD_4nXfi4I1vvkkDdaCSkg6GpBkJJujP5B1Wna92WjUjj_LKLBQcbzyXHCALcwOCEp5hK8IQnyeMgAWKvO4QICoUkK1x-z_WwlaXoO8H4pAEB4tD3FJP-YQA4mQmDj219SFQLrluNseBUg?key=yp8JbPK_p8kjdiW9eNw4FA) ![](https://lh7-rt.googleusercontent.com/docsz/AD_4nXeKXnHED0j6aghFJNv6p1QCElqVKV3E_RVNJ_Tnr_mfF5zzM2r-JXdUrf9W6S23RgbByMK3wSICwFkdLHe4L9zpU0qXFqN2vdfvpV3Pv_G15AXfqsTXGJkBpQwBbpr4t0Rd1KUs?key=yp8JbPK_p8kjdiW9eNw4FA) ![](https://lh7-rt.googleusercontent.com/docsz/AD_4nXfFW67m6J8TnmXcRCS9HeaXN5qa362NkkFKTfSJyrounWZSgrIE4XyLqgcFZNQf5sHyCuAT8x1gxUhvM9JOez3gjNAN7MK-Ch8fTjCGx7uh-aJQDfyBPSlJi1UPyPOEqi8A224rkQ?key=yp8JbPK_p8kjdiW9eNw4FA) {% endstep %} {% step %} Check that Grow Sensor data is being received by the broker and find your topic:\ Settings -> Devices and Services -> MQTT -> ![](https://lh7-rt.googleusercontent.com/docsz/AD_4nXfwSTRaHLmvr2IX2ejcwWbpy1buPlxQnV2r6m9rlvbKgFqlK6iGeGvgkt56TtC2kgGZTlRakrTDFtQcMKssv0PHKbgrRQx4FlmdWFILuDUiJ8aFVljCisVJ34tvMetSiwSlBfBMug?key=yp8JbPK_p8kjdiW9eNw4FA) Configure (symbol) Listen to a topic. Enter # as the topic which allows all messages on the mqtt broker to be displayed for you. ![](https://lh7-rt.googleusercontent.com/docsz/AD_4nXcoKUglYNkNxN0bkVbWYmGe7v95yrFp2ZgUmgu8jI72QrDnLs1Wd6vH3vlGspJOM4IZR1xNlQ0yAj5a6fitZrr7BYuhcm65cEJoBXLfaqYP2B-yog-GhizmWmf46XPypo89lA0t?key=yp8JbPK_p8kjdiW9eNw4FA) Press START LISTENING and wait for data to arrive. It can take up to 3 minutes because the standard sensor refresh time is 3 minutes IMPORTANT: Extract the topic from this screen as you need it for the Sensor integration step. In this example, the topic is GROW/GROW-00070006 {% endstep %} {% endstepper %} ### Option 1. Integrating sensors using MQTT discovery - The sensor does not send a discovery message, so we must send it manually to the HA mqtt broker. * Settings -> Devices and Services -> MQTT -> Configure (symbol) * The following example text needs to be modified to have the same topic structure and sensor\_id that you see on the broker. I.e. Find/Replace 70006 with your sensor’s ID. * Each message below must be published on its own topic below with retain: ``` Topic: homeassistant/sensor/7000601/config Message: {"name": "70006 Temperature", "state_topic": "GROW/GROW-00070006", "value_template": "{{ value_json.r1val }}", "unit_of_measurement": "°C", "unique_id": "7000601"} Topic: homeassistant/sensor/7000602/config Message: {"name": "70006 Humidity", "state_topic": "GROW/GROW-00070006", "value_template": "{{ value_json.r2val }}", "unit_of_measurement": "%", "unique_id": "7000602"} Topic: homeassistant/sensor/7000603/config Message: {"name": "70006 Pressure", "state_topic": "GROW/GROW-00070006", "value_template": "{{ value_json.r3val }}", "unit_of_measurement": "mBar", "unique_id": "7000603"} Topic: homeassistant/sensor/7000604/config Message: {"name": "70006 Dew Point", "state_topic": "GROW/GROW-00070006", "value_template": "{{ value_json.r4val }}", "unit_of_measurement": "°C", "unique_id": "7000604"} Topic: homeassistant/sensor/7000605/config Message: {"name": "70006 Dew Point Gap", "state_topic": "GROW/GROW-00070006", "value_template": "{{ value_json.r5val }}", "unit_of_measurement": "°C", "unique_id": "7000605"} Topic: homeassistant/sensor/7000606/config Message: {"name": "70006 CO2", "state_topic": "GROW/GROW-00070006", "value_template": "{{ value_json.r6val }}", "unit_of_measurement": "ppm", "unique_id": "7000606"} Topic: homeassistant/sensor/7000607/config Message: {"name": "70006 Ambient VPD", "state_topic": "GROW/GROW-00070006", "value_template": "{{ value_json.r7val }}", "unit_of_measurement": "kPa", "unique_id": "7000607"} Topic: homeassistant/sensor/7000608/config Message: {"name": "70006 Leaf Temp", "state_topic": "GROW/GROW-00070006", "value_template": "{{ value_json.r8val }}", "unit_of_measurement": "°C", "unique_id": "7000608"} Topic: homeassistant/sensor/7000609/config Message: {"name": "70006 ePPFD", "state_topic": "GROW/GROW-00070006", "value_template": "{{ value_json.r9val }}", "unit_of_measurement": "µmol/s/m2", "unique_id": "7000609"} Topic: homeassistant/sensor/7000610/config Message: {"name": "70006 RQLI Red", "state_topic": "GROW/GROW-00070006", "value_template": "{{ value_json.r10val }}", "unit_of_measurement": "%", "unique_id": "7000610"} Topic: homeassistant/sensor/7000611/config Message: {"name": "70006 RQLI Green", "state_topic": "GROW/GROW-00070006", "value_template": "{{ value_json.r11val }}", "unit_of_measurement": "%", "unique_id": "7000611"} Topic: homeassistant/sensor/7000612/config Message: {"name": "70006 RQLI Blue", "state_topic": "GROW/GROW-00070006", "value_template": "{{ value_json.r12val }}", "unit_of_measurement": "%", "unique_id": "7000612"} Topic: homeassistant/sensor/7000613/config Message: {"name": "70006 RQLI IR", "state_topic": "GROW/GROW-00070006", "value_template": "{{ value_json.r13val }}", "unit_of_measurement": "%", "unique_id": "7000613"} Topic: homeassistant/sensor/7000614/config Message: {"name": "70006 eDLI", "state_topic": "GROW/GROW-00070006", "value_template": "{{ value_json.r14val }}", "unit_of_measurement": "mol/m2/d", "unique_id": "7000614"} Topic: homeassistant/sensor/7000615/config Message: {"name": "70006 Substrate Moisture", "state_topic": "GROW/GROW-00070006", "value_template": "{{ value_json.r15val }}", "unit_of_measurement": "%", "unique_id": "7000615"} Topic: homeassistant/sensor/7000616/config Message: {"name": "70006 Substrate ECp", "state_topic": "GROW/GROW-00070006", "value_template": "{{ value_json.r16val }}", "unit_of_measurement": "mS/cm", "unique_id": "7000616"} Topic: homeassistant/sensor/7000617/config Message: {"name": "70006 Substrate Temp", "state_topic": "GROW/GROW-00070006", "value_template": "{{ value_json.r17val }}", "unit_of_measurement": "°C", "unique_id": "7000617"} Topic: homeassistant/sensor/7000618/config Message: {"name": "70006 Leaf VPD", "state_topic": "GROW/GROW-00070006", "value_template": "{{ value_json.r18val }}", "unit_of_measurement": "kPa", "unique_id": "7000618"} Topic: homeassistant/sensor/7000619/config Message: {"name": "70006 Ambient Leaf difference", "state_topic": "GROW/GROW-00070006", "value_template": "{{ value_json.r19val }}", "unit_of_measurement": "°C", "unique_id": "7000619"} ``` \ Alternatively, they can all be done together by pasting the following into a CLI terminal. (Need to download the Terminal Add-on) ``` mosquitto_pub -h localhost -t homeassistant/sensor/7000601/config -r -m '{"name": "70006 Temperature", "state_topic": "GROW/GROW-00070006", "value_template": "{{ value_json.r1val }}", "unit_of_measurement": "°C", "unique_id": "7000601"}' mosquitto_pub -h localhost -t homeassistant/sensor/7000602/config -r -m '{"name": "70006 Humidity", "state_topic": "GROW/GROW-00070006", "value_template": "{{ value_json.r2val }}", "unit_of_measurement": "%", "unique_id": "7000602"}' mosquitto_pub -h localhost -t homeassistant/sensor/7000603/config -r -m '{"name": "70006 Pressure", "state_topic": "GROW/GROW-00070006", "value_template": "{{ value_json.r3val }}", "unit_of_measurement": "mBar", "unique_id": "7000603"}' mosquitto_pub -h localhost -t homeassistant/sensor/7000604/config -r -m '{"name": "70006 Dew Point", "state_topic": "GROW/GROW-00070006", "value_template": "{{ value_json.r4val }}", "unit_of_measurement": "°C", "unique_id": "7000604"}' mosquitto_pub -h localhost -t homeassistant/sensor/7000605/config -r -m '{"name": "70006 Dew Point Gap", "state_topic": "GROW/GROW-00070006", "value_template": "{{ value_json.r5val }}", "unit_of_measurement": "°C", "unique_id": "7000605"}' mosquitto_pub -h localhost -t homeassistant/sensor/7000606/config -r -m '{"name": "70006 CO2", "state_topic": "GROW/GROW-00070006", "value_template": "{{ value_json.r6val }}", "unit_of_measurement": "ppm", "unique_id": "7000606"}' mosquitto_pub -h localhost -t homeassistant/sensor/7000607/config -r -m '{"name": "70006 Ambient VPD", "state_topic": "GROW/GROW-00070006", "value_template": "{{ value_json.r7val }}", "unit_of_measurement": "kPa", "unique_id": "7000607"}' mosquitto_pub -h localhost -t homeassistant/sensor/7000608/config -r -m '{"name": "70006 Leaf Temp", "state_topic": "GROW/GROW-00070006", "value_template": "{{ value_json.r8val }}", "unit_of_measurement": "°C", "unique_id": "7000608"}' mosquitto_pub -h localhost -t homeassistant/sensor/7000609/config -r -m '{"name": "70006 ePPFD", "state_topic": "GROW/GROW-00070006", "value_template": "{{ value_json.r9val }}", "unit_of_measurement": "µmol/s/m2", "unique_id": "7000609"}' mosquitto_pub -h localhost -t homeassistant/sensor/7000610/config -r -m '{"name": "70006 RQLI Red", "state_topic": "GROW/GROW-00070006", "value_template": "{{ value_json.r10val }}", "unit_of_measurement": "%", "unique_id": "7000610"}' mosquitto_pub -h localhost -t homeassistant/sensor/7000611/config -r -m '{"name": "70006 RQLI Green", "state_topic": "GROW/GROW-00070006", "value_template": "{{ value_json.r11val }}", "unit_of_measurement": "%", "unique_id": "7000611"}' mosquitto_pub -h localhost -t homeassistant/sensor/7000612/config -r -m '{"name": "70006 RQLI Blue", "state_topic": "GROW/GROW-00070006", "value_template": "{{ value_json.r12val }}", "unit_of_measurement": "%", "unique_id": "7000612"}' mosquitto_pub -h localhost -t homeassistant/sensor/7000613/config -r -m '{"name": "70006 RQLI IR", "state_topic": "GROW/GROW-00070006", "value_template": "{{ value_json.r13val }}", "unit_of_measurement": "%", "unique_id": "7000613"}' mosquitto_pub -h localhost -t homeassistant/sensor/7000614/config -r -m '{"name": "70006 eDLI", "state_topic": "GROW/GROW-00070006", "value_template": "{{ value_json.r14val }}", "unit_of_measurement": "mol/m2/d", "unique_id": "7000614"}' mosquitto_pub -h localhost -t homeassistant/sensor/7000615/config -r -m '{"name": "70006 Substrate Moisture", "state_topic": "GROW/GROW-00070006", "value_template": "{{ value_json.r15val }}", "unit_of_measurement": "%", "unique_id": "7000615"}' mosquitto_pub -h localhost -t homeassistant/sensor/7000616/config -r -m '{"name": "70006 Substrate ECp", "state_topic": "GROW/GROW-00070006", "value_template": "{{ value_json.r16val }}", "unit_of_measurement": "mS/cm", "unique_id": "7000616"}' mosquitto_pub -h localhost -t homeassistant/sensor/7000617/config -r -m '{"name": "70006 Substrate Temp", "state_topic": "GROW/GROW-00070006", "value_template": "{{ value_json.r17val }}", "unit_of_measurement": "°C", "unique_id": "7000617"}' mosquitto_pub -h localhost -t homeassistant/sensor/7000618/config -r -m '{"name": "70006 Leaf VPD", "state_topic": "GROW/GROW-00070006", "value_template": "{{ value_json.r18val }}", "unit_of_measurement": "kPa", "unique_id": "7000618"}' mosquitto_pub -h localhost -t homeassistant/sensor/7000619/config -r -m '{"name": "70006 Ambient Leaf difference", "state_topic": "GROW/GROW-00070006", "value_template": "{{ value_json.r19val }}", "unit_of_measurement": "°C", "unique_id": "7000619"}' ``` ### Option 2. Integrating the sensors into HA by editing configuration.yaml **Pros:** one step **Cons**: slightly less flexibility in the Home Assistant UI Now that HA is receiving data, we must decode this JSON and assign it to individual entities. Now that HA is receiving data, we must decode this JSON and assign it to individual entities. ``` mqtt sensor: - name: "70006 Temperature" state_topic: "GROW/GROW-00070006" value_template: "{{ value_json.r1val }}" unit_of_measurement: "°C" unique_id: "7000601" - name: "70006 Humidity" state_topic: "GROW/GROW-00070006" value_template: "{{ value_json.r2val }}" unit_of_measurement: "%" unique_id: "7000602" - name: "70006 Pressure" state_topic: "GROW/GROW-00070006" value_template: "{{ value_json.r3val }}" unit_of_measurement: "mBar" unique_id: "7000603" - name: "70006 Dew Point" state_topic: "GROW/GROW-00070006" value_template: "{{ value_json.r4val }}" unit_of_measurement: "°C" unique_id: "7000604" - name: "70006 Dew Point Gap" state_topic: "GROW/GROW-00070006" value_template: "{{ value_json.r5val }}" unit_of_measurement: "°C" unique_id: "7000605" - name: "70006 CO2" state_topic: "GROW/GROW-00070006" value_template: "{{ value_json.r6val }}" unit_of_measurement: "ppm" unique_id: "7000606" - name: "70006 Ambient VPD" state_topic: "GROW/GROW-00070006" value_template: "{{ value_json.r7val }}" unit_of_measurement: "kPa" unique_id: "7000607" - name: "70006 Leaf Temp" state_topic: "GROW/GROW-00070006" value_template: "{{ value_json.r8val }}" unit_of_measurement: "°C" unique_id: "7000608" - name: "70006 ePPFD" state_topic: "GROW/GROW-00070006" value_template: "{{ value_json.r9val }}" unit_of_measurement: "µmol/s/m2" unique_id: "7000609" - name: "70006 RQLI Red" state_topic: "GROW/GROW-00070006" value_template: "{{ value_json.r10val }}" unit_of_measurement: "%" unique_id: "7000610" - name: "70006 RQLI Green" state_topic: "GROW/GROW-00070006" value_template: "{{ value_json.r11val }}" unit_of_measurement: "%" unique_id: "7000611" - name: "70006 RQLI Blue" state_topic: "GROW/GROW-00070006" value_template: "{{ value_json.r12val }}" unit_of_measurement: "%" unique_id: "7000612" - name: "70006 RQLI IR" state_topic: "GROW/GROW-00070006" value_template: "{{ value_json.r13val }}" unit_of_measurement: "%" unique_id: "7000613" - name: "70006 eDLI" state_topic: "GROW/GROW-00070006" value_template: "{{ value_json.r14val }}" unit_of_measurement: "mol/m2/d" unique_id: "7000614" - name: "70006 Substrate Moisture" state_topic: "GROW/GROW-00070006" value_template: "{{ value_json.r15val }}" unit_of_measurement: "%" unique_id: "7000615" - name: "70006 Substrate ECp" state_topic: "GROW/GROW-00070006" value_template: "{{ value_json.r16val }}" unit_of_measurement: "mS/cm" unique_id: "7000616" - name: "70006 Substrate Temp" state_topic: "GROW/GROW-00070006" value_template: "{{ value_json.r17val }}" unit_of_measurement: "°C" unique_id: "7000617" - name: "70006 Leaf VPD" state_topic: "GROW/GROW-00070006" value_template: "{{ value_json.r18val }}" unit_of_measurement: "kPa" unique_id: "7000618" - name: "70006 Ambient Leaf difference" state_topic: "GROW/GROW-00070006" value_template: "{{ value_json.r19val }}" unit_of_measurement: "°C" unique_id: "7000619" ``` #### Create a dashboard Got to : Settings -> Dashboards -> +ADD DASHBOARD -> New dashboard from scratch Edit dashboard ![](https://lh7-rt.googleusercontent.com/docsz/AD_4nXfvaJqTwpnWtl3m8zJvlgGUZ24BuV5DL_VnG_ooIvKHEVszzc3i2wnrvLtfvDoiq2Hr_JKJDjMvuiRMZhjhT7cDGP_IaAQ4wpFVTZgTDCn_mN8UScX_TNkAVhNP6_bw-pOAo1ZOWQ?key=yp8JbPK_p8kjdiW9eNw4FA) ![](https://lh7-rt.googleusercontent.com/docsz/AD_4nXd_bP3wuOomh9JufQnMFdxgrSpXwRRuo1WT5z20R9iiDKDYbCVIb8yzlKQmqHXT_VuMy54AJCtvqrByXO8JIrPCxkNncaZtRKqMbrFKakFhDc9fnhF7SqHF25iVc7-F6oWqGvbNAg?key=yp8JbPK_p8kjdiW9eNw4FA) -> {} Raw configuration editor Enter this: ``` title: Grow Sensor Dashboard views: - title: Sensor Overview path: sensor-overview theme: default cards: - type: vertical-stack cards: - type: markdown content: | ## 🌡️ Main Environment - type: horizontal-stack cards: - type: history-graph title: Temperature hours_to_show: 6 entities: - sensor.grow_00070006_70006_temperature - type: history-graph title: Humidity hours_to_show: 6 entities: - sensor.70006_humidity - type: horizontal-stack cards: - type: history-graph title: CO2 hours_to_show: 6 entities: - sensor.70006_co2 - type: history-graph title: Ambient VPD hours_to_show: 6 entities: - sensor.70006_ambient_vpd - type: vertical-stack cards: - type: markdown content: | ## 🌱 Soil Readings - type: horizontal-stack cards: - type: history-graph title: Substrate Moisture hours_to_show: 6 entities: - sensor.70006_substrate_moisture - type: history-graph title: Substrate ECp hours_to_show: 6 entities: - sensor.70006_substrate_ecp - type: history-graph title: Substrate Temp hours_to_show: 6 entities: - sensor.70006_substrate_temp - type: vertical-stack cards: - type: markdown content: | ## 💡 Light & Radiation - type: history-graph title: RQLI Spectrum (Red, Green, Blue, IR) hours_to_show: 6 entities: - sensor.70006_rqli_red - sensor.70006_rqli_green - sensor.70006_rqli_blue - sensor.70006_rqli_ir - type: horizontal-stack cards: - type: history-graph title: ePPFD hours_to_show: 6 entities: - sensor.70006_eppfd - type: history-graph title: eDLI hours_to_show: 6 entities: - sensor.70006_edli - type: vertical-stack cards: - type: markdown content: | ## 📊 Other Sensor Data - type: horizontal-stack cards: - type: history-graph title: Pressure hours_to_show: 6 entities: - sensor.70006_pressure - type: history-graph title: Dew Point hours_to_show: 6 entities: - sensor.70006_dew_point - type: horizontal-stack cards: - type: history-graph title: Dew Point Gap hours_to_show: 6 entities: - sensor.70006_dew_point_gap - type: history-graph title: Leaf Temp hours_to_show: 6 entities: - sensor.70006_leaf_temp - type: horizontal-stack cards: - type: history-graph title: Leaf VPD hours_to_show: 6 entities: - sensor.70006_leaf_vpd - type: history-graph title: Ambient Leaf Difference hours_to_show: 6 entities: - sensor.70006_ambient_leaf_difference ``` # Do you have team Grow account access? Currently, team accounts are not available, but this feature is on our roadmap for later in 2025. If this is something you’d like to see, let us know at . Your feedback helps shape future updates. # How can I opt in to test latest beta software and updates? If you're interested in testing beta features and early updates, contact us at to join our beta testing program. # Making a purchase {% content-ref url="/pages/aOvc73TGjVevTa3q6RZk" %} [What are my payment options?](/making-a-purchase/what-are-my-payment-options) {% endcontent-ref %} {% content-ref url="/pages/01sFgjBu9x2Em6syUwVN" %} [Do you offer financing or instalment payment options?](/making-a-purchase/do-you-offer-financing-or-instalment-payment-options) {% endcontent-ref %} {% content-ref url="/pages/iS562kZBn7qKWQbcdSaf" %} [Is my payment information secure?](/making-a-purchase/is-my-payment-information-secure) {% endcontent-ref %} {% content-ref url="/pages/RKWQpirUcMvicKpqQS3Z" %} [Can I split my payment between multiple methods?](/making-a-purchase/can-i-split-my-payment-between-multiple-methods) {% endcontent-ref %} {% content-ref url="/pages/n9DXw4dQOze55wEFyN9x" %} [Do you offer any discounts or promotions on the Grow Sensor?](/making-a-purchase/do-you-offer-any-discounts-or-promotions-on-the-grow-sensor) {% endcontent-ref %} {% content-ref url="/pages/AD4Rq7nu4MxGJTKoAtfB" %} [Can I cancel or change an order?](/making-a-purchase/can-i-cancel-or-change-an-order) {% endcontent-ref %} {% content-ref url="/pages/RK7596evHGoRcZYZfm74" %} [How can I be notified when the Grow Sensor is back in stock?](/making-a-purchase/how-can-i-be-notified-when-the-grow-sensor-is-back-in-stock) {% endcontent-ref %} {% content-ref url="/pages/MYRqRPXSaZVabwIwZNXP" %} [Are there any quantity limits for purchasing the Grow Sensor?](/making-a-purchase/are-there-any-quantity-limits-for-purchasing-the-grow-sensor) {% endcontent-ref %} # What are my payment options? We offer a variety of secure and convenient payment options to make your purchase of the Grow Sensor as smooth as possible. You can choose from the following methods at checkout: * **Credit or debit card:** We accept all major credit and debit cards, including Visa, Mastercard, American Express, and Discover. * PayPal: Use your PayPal account for a fast and secure checkout. * **Gift cards or store credit:** If you have a Grow Sensor gift card or store credit, you can apply it to your order during checkout. * **Prepaid cards or virtual wallets:** We also accept payments via prepaid cards and virtual wallets for added flexibility. * **Apple Pay or Google Pay:** Enjoy a one-tap checkout experience with Apple Pay or Google Pay when shopping from your mobile device or compatible browser. * **Cryptocurrency:** For those who prefer crypto, we accept popular cryptocurrencies through our secure payment gateway. No matter which option you choose, rest assured that all transactions are encrypted and secure. If you have any questions about payment or run into any issues during checkout, feel free to contact our support team on
# \*TBC\* Are there any additional fees for certain payment methods? - don't forget to add to payment op No, we don’t charge any additional fees based on your chosen payment method. Whether you pay with a credit/debit card, PayPal, Apple Pay, Google Pay, cryptocurrency, or a virtual wallet, the price you see at checkout is the final amount you’ll pay. However, depending on your bank or payment provider, there might be foreign transaction fees if you’re shopping from outside our primary currency region. We recommend checking with your bank if you’re unsure. Since we use Shopify as our secure payment processor, you can trust that your payment is safe and transparent, no matter which method you choose. # Will I have to pay any import duties, tarifs or additional costs? {% hint style="info" %} Estimated import costs are per individual sensor and may vary slightly depending on your country’s regulations and courier processing. \ \ All duties, taxes, and fees are typically collected by the courier prior to or at delivery. Information correct as of 28th May 2025. {% endhint %} **Australia:** AUD $75 - Includes 10% GST on the sensor price. **Canada:** CAD $80–130 - Includes 5–15% GST/HST (varies by province) and a customs processing fee (\~CAD $10–15). **European Union:** €145–190 - Includes 20–25% VAT and a customs handling fee (€10–20), depending on your country. **New Zealand:** NZD $135 - Includes 15% GST and an import entry fee (\~NZD $60). **United States:** $75 USD - Includes a 10% import tariff (as of 2025). **United Kingdom:** None - All taxes and duties are included in the listed price. Nothing more to pay. # Do you offer financing or instalment payment options? Yes, we offer flexible payment options to make purchasing your Grow Sensor even easier. \ Depending on your location and eligibility, you can choose one of the following instalment plans at checkout: * **Klarna:** Split your purchase into manageable payments with Klarna's "Pay in 3" or "Pay in 4" instalment plans, subject to Klarna's terms and availability in your region. * **PayPal Pay Later:** If eligible, PayPal allows you to spread the cost of your purchase over multiple payments. This option will appear at checkout when you select PayPal as your payment method. Both Klarna and PayPal Pay Later provide quick approvals without impacting your credit score. Simply choose your preferred option during checkout if it's available to you. # Is my payment information secure? Yes, your payment information is completely secure when you shop with us. We use Shopify as our trusted payment processor, which means all transactions are protected by industry-leading encryption and security protocols. Here’s how we keep your payment details safe * **Secure checkout:** Shopify's checkout process uses SSL (Secure Socket Layer) encryption to protect your personal and payment information. * **PCI compliance:** Shopify is Level 1 PCI DSS compliant, ensuring the highest standards for payment security. * **No stored payment info:** We never store your payment details. All transactions are processed securely through Shopify and your chosen payment provider. * **Fraud prevention:** Shopify’s advanced fraud detection tools help identify and prevent unauthorised transactions. Whether you pay by credit card, PayPal, Klarna, Apple Pay, Google Pay, or cryptocurrency, you can shop with confidence, knowing your information is protected every step of the way.
# Can I split my payment between multiple methods? Currently, we don’t offer the option to split payments between multiple payment methods. At checkout, each order must be completed using a single payment method.
# Do you offer any discounts or promotions on the Grow Sensor? Yes, we occasionally offer special discounts and promotions on the Grow Sensor! To be the first to know about exclusive deals, sign up for our newsletter. It’s easy to join 1. Visit our[ homepage](https://www.growsensor.co/). 2. Scroll down to the bottom of the page. 3. Look for where it says “Stay up to date” in the bottom right corner and enter your email. Once subscribed, you'll receive updates on promotions, product news, and expert growing tips straight to your inbox. # Can I cancel or change an order? Yes, you can cancel or change your order as long as it hasn't been shipped. To make any changes, please contact us as soon as possible at with your order number and details of the change or cancellation request. Once an order has been dispatched, we can no longer make changes, but you can still return the item under our 30-day money-back guarantee. # How can I be notified when the Grow Sensor is back in stock? To get notified when the Grow Sensor is back in stock, simply sign up for our newsletter. You’ll be the first to know about restocks, exclusive offers, and product updates. Visit our[ homepage](https://www.growsensor.co/), scroll down to the bottom of the page, then enter your email in the “Stay up to date” box located in the bottom right corner. Once you're signed up, we'll keep you in the loop about all the latest news!
# Are there any quantity limits for purchasing the Grow Sensor? No, there are no quantity limits when purchasing the Grow Sensor. Whether you’re buying one for personal use or multiple for a larger setup, you can order as many as you need. If you're planning a bulk purchase and have any questions, feel free to contact us on - we're happy to help!
# Returns and refunds {% content-ref url="/pages/IXQIPnx9V6NLS4P5q2u3" %} [Do you have a warranty?](/returns-and-refunds/do-you-have-a-warranty) {% endcontent-ref %} {% content-ref url="/pages/aCzh9Zr6cYXxVUcZUcPW" %} [Do you have a satisfaction guarantee?](/returns-and-refunds/do-you-have-a-satisfaction-guarantee) {% endcontent-ref %} {% content-ref url="/pages/wczBEg6hNCBoG931MwbE" %} [Do you have a returns and refund policy?](/returns-and-refunds/do-you-have-a-returns-and-refund-policy) {% endcontent-ref %} {% content-ref url="/pages/MOxgZNUIkfUBOkttXQ0o" %} [What are the returns conditions?](/returns-and-refunds/what-are-the-returns-conditions) {% endcontent-ref %} {% content-ref url="/pages/MwlRMz7nCxsj7GHIMt61" %} [Can I return a Grow Sensor that has been opened or used?](/returns-and-refunds/can-i-return-a-grow-sensor-that-has-been-opened-or-used) {% endcontent-ref %} {% content-ref url="/pages/S964XVJrVObNCz6aQHea" %} [What do I need to include when returning the Grow Sensor?](/returns-and-refunds/what-do-i-need-to-include-when-returning-the-grow-sensor) {% endcontent-ref %} {% content-ref url="/pages/hWAiMhvkgDCPuaSYoi1p" %} [What should I do if I receive a damaged or defective Grow Sensor?](/returns-and-refunds/what-should-i-do-if-i-receive-a-damaged-or-defective-grow-sensor) {% endcontent-ref %} {% content-ref url="/pages/2dWOo7DvoAWeTcCo3xSX" %} [Can I return or exchange a damaged or defective Grow Sensor?](/returns-and-refunds/can-i-return-or-exchange-a-damaged-or-defective-grow-sensor) {% endcontent-ref %} {% content-ref url="/pages/wbGkdgr2VsHo1CGw8owH" %} [Will the shipping costs be refunded?](/returns-and-refunds/will-the-shipping-costs-be-refunded) {% endcontent-ref %} {% content-ref url="/pages/nM0zov5rm8Jv975C9omS" %} [Will I be reimbursed for shipping if I return a damaged or defective Grow Sensor?](/returns-and-refunds/will-i-be-reimbursed-for-shipping-if-i-return-a-damaged-or-defective-grow-sensor) {% endcontent-ref %} {% content-ref url="/pages/UFieDnQBBUNjsTkrFel4" %} [Does it cost to make a return?](/returns-and-refunds/does-it-cost-to-make-a-return) {% endcontent-ref %} {% content-ref url="/pages/CBbHpUO7EbiMSMxuFPUj" %} [Do I need to pay for shipping when sending back a return?](/returns-and-refunds/do-i-need-to-pay-for-shipping-when-sending-back-a-return) {% endcontent-ref %} {% content-ref url="/pages/jydjwfACnOQAVeSR5lRy" %} [How can I return the Grow Sensor?](/returns-and-refunds/how-can-i-return-the-grow-sensor) {% endcontent-ref %} {% content-ref url="/pages/uSYTSRVRNngJ6FdTYDSx" %} [When will I receive my refund?](/returns-and-refunds/when-will-i-receive-my-refund) {% endcontent-ref %} {% content-ref url="/pages/YTUpuDJar0CWIUGHJskc" %} [What can’t I return?](/returns-and-refunds/what-cant-i-return) {% endcontent-ref %} # Do you have a warranty? Yes, we offer a 365-day limited warranty on all Grow Sensors purchased directly from us. This warranty covers any defects in materials or workmanship under normal use. [You can read the full warranty here](https://shop.growsensor.co/products/the-grow-sensor-pro#:~:text=Yea%20we%20do,a%20satisfaction%20Guarantee%3F). \ If you believe your Grow Sensor is defective, simply contact us to start the process. We'll help diagnose the issue and find the best solution for you. To get started, email us at
# Do you have a satisfaction guarantee? Yes, we offer a 30-day satisfaction guarantee because we’re confident you’ll love your Grow Sensor. If you're not completely satisfied, simply email us at within 30 days of receiving your order, and we’ll process a full refund, no questions asked.
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