BoardPilotCapacitive soil moisture sensor v1.2 with ESP32
Supply 3.3-5 V
Bus ANALOG
Measures soil moisture
Pins and ESP32 wiring
| Pin | Role | ESP32 pin | Notes |
|---|---|---|---|
| GND | Ground | GND | |
| VCC | Power | 3V3 | |
| AOUT | Analog output | D34 | Lower voltage means wetter soil. To an ADC pin (prefer ADC1: GPIO 32 to 39) |
Suggested wiring for the 30-pin ESP32 DevKit, avoiding flash, input-only and strapping pins. BoardPilot checks it for you as you wire.
Starter code (Arduino)
void setup() { Serial.begin(115200); }
void loop() {
int mv = analogReadMilliVolts(34); // AOUT on GPIO 34
Serial.println(mv);
delay(200);
}Sources
- DFRobot SEN0193 capacitive soil moisture sensor wiki, Supply 3.3 to 5.5 V, analog output 0 to 3.0 V
Try it in 3D in BoardPilot
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Part data: CC BY 4.0, free to reuse with credit to BoardPilot.