Adafruit STEMMA Soil Sensor – I2C Capacitive Moisture Sensor
Pinout
- VCC
Supply voltage – 3.3V (also accepts 5V); connects to 3.3V rail from AMS1117-3.3V
Type · PowerVoltage · 3.3 - GND
Common ground
Type · Ground - SDA
I2C data line – connect to ESP32 GPIO21 (SDA)
Type · I2C - SCL
I2C clock line – connect to ESP32 GPIO22 (SCL)
Type · I2C
| Pin | 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) |
Pin details
4 connections- VCC
Supply voltage – 3.3V (also accepts 5V); connects to 3.3V rail from AMS1117-3.3V
PowerVoltage · 3.3 - GND
Common ground
Ground - SDA
I2C data line – connect to ESP32 GPIO21 (SDA)
I2C - SCL
I2C clock line – connect to ESP32 GPIO22 (SCL)
I2C
Start wiring
Analog · UART · 3.3 – 5 V · Gravity
Confirm the data interface matches your host board.
Module pins: VCC, GND, SDA, SCL. Schematik maps them to your board in the app.
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