Adafruit STEMMA Soil Sensor – I2C Capacitive Moisture Sensor
adafruit-stemma-soil-sensor-i2c
adafruit-stemma-soil-sensor-i2cAdafruit STEMMA capacitive soil moisture sensor using an I2C interface. Operates at 3.3V or 5V. Reports moisture (and optionally temperature) via I2C at default address 0x36. Compatible with ESP32, Arduino, and Raspberry Pi.
Pinout
| Pin | Position | Type | Function | Voltage |
|---|---|---|---|---|
| VCC | power | Supply voltage – 3.3V (also accepts 5V); connects to 3.3V rail from AMS1117-3.3V | 3.3 | |
| GND | ground | Common ground | ||
| SDA | i2c | I2C data line – connect to ESP32 GPIO21 (SDA) | ||
| SCL | i2c | I2C clock line – connect to ESP32 GPIO22 (SCL) |
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