Capacitive soil moisture sensor with ESP32-S3-DevKitC-1

Wiring for the Capacitive soil moisture sensor v1.2 on the ESP32-S3-DevKitC-1 (ESP32-S3, 3.3 V logic), chosen with the same pin rules BoardPilot uses: default buses first, and no pins that are used for flash, USB, the debugger or booting.

Wiring

Check before you power it on

• Supply: 3.3 V from the 3V3 pin.

Test code (Arduino)

void setup() {
  Serial.begin(115200);
}

void loop() {
  long mv = analogReadMilliVolts(1);  // AOUT on 1
  Serial.println(mv);
  delay(200);
}

Arduino board: esp32:esp32:esp32s3. Use the port labelled UART. If uploading does not start, hold BOOT, press and release RESET, then release BOOT.

Questions

Which ESP32-S3-DevKitC-1 pins do I use for the Capacitive soil moisture sensor?

GND → G, VCC → 3V3, AOUT → 1.

Does the Capacitive soil moisture sensor work with the ESP32-S3-DevKitC-1 at 3.3 V?

Yes: the Capacitive soil moisture sensor runs at 3.3-5 V and the ESP32-S3-DevKitC-1 uses 3.3 V signals, so no level shifting is needed.

Full ESP32-S3-DevKitC-1 pinout · Capacitive soil moisture sensor v1.2: all pins and data

The Capacitive soil moisture sensor on other boards

ESP32 DevKit Arduino Mega 2560 R3 Arduino Nano Arduino Uno R3 WeAct Black Pill STM32F411CE ESP32-C3-DevKitM-1 Nordic nRF52840 DK NUCLEO-F401RE Raspberry Pi Pico 2 Raspberry Pi Pico W Raspberry Pi Pico Teensy 4.1

Other parts on the ESP32-S3-DevKitC-1

BME280 BMP280 DHT22 DHT11 HC-SR04 SSD1306 OLED MPU6050 DS18B20 WS2812B LED strip SG90 servo Relay module HC-SR501 PIR LCD 1602 I2C INA219 VL53L0X BH1750 MAX30102 RC522 RFID NEO-6M GPS ADS1115 TM1637 28BYJ-48 stepper L298N Potentiometer Push button LED Joystick module SD card module AHT20