LILYGO T-Higrow
ESP32 plant sensor board with capacitive soil moisture, soil fertility, BH1750 light sensor, and DHT11/BME280 temperature/humidity — WiFi-connected smart plant care for gardens and greenhouses.
$9.31
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Specifications
Components
Espressif ESP32-D0WDQ6 dual-core Xtensa LX6 at 240MHz with WiFi and Bluetooth 4.2/BLE.
ROHM BH1750 I2C ambient light sensor with 1–65535 lux range for plant light-cycle monitoring.
AOSONG DHT11 digital temperature and humidity sensor (±2°C, ±5% RH) for environmental monitoring.
Bus Interfaces
GPIO Map
Overview
The LILYGO T-Higrow is a purpose-built plant monitoring board combining an Espressif ESP32 with a suite of agricultural sensors on a single PCB with a probe tip for direct soil insertion. The capacitive soil moisture sensor avoids the corrosion issues of resistive alternatives, and a dedicated soil fertility/conductivity sensor measures nutrient concentration in the growing medium.
Environmental conditions are captured by either a DHT11 (temperature + humidity) or BME280 (temperature, humidity, and barometric pressure) sensor depending on the variant. A BH1750 I2C light intensity sensor covers 1–65535 lux, enabling light-cycle monitoring for indoor grow systems. The onboard WiFi 802.11 b/g/n allows real-time data reporting to Home Assistant via MQTT, ESPHome, or ThingSpeak.
Kit variants include a 200mAh LiPo battery for cable-free operation. With Arduino IDE and MicroPython support and an active GitHub repository, the T-Higrow is a ready-to-deploy soil sensor for smart gardens, greenhouses, and precision agriculture projects.
Use Cases
5Plant Monitoring
Monitoring soil moisture, temperature, humidity, and light to automate plant care and watering.
Greenhouse Automation
Automating greenhouse climate and irrigation using sensor data for temperature, moisture, and light levels.
Environmental Monitoring
Monitoring environmental conditions like temperature, humidity, air quality, and weather data using remote sensors.
Smart Home
Home automation devices for controlling lighting, climate, security, and appliances.
IoT
Internet of Things applications including connected sensors, actuators, and smart devices that communicate over WiFi, BLE, LoRa, or other wireless protocols.
Resources
Where to Buy
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