10 kΩ potentiometer with ESP32

Supply 3.3 V Bus ANALOG

Pins and ESP32 wiring

Pin	Role	ESP32 pin	Notes
VCC	Power	3V3	Use 3V3, never VIN: the ESP32 ADC must not see more than 3.3 V
OUT	Analog output	D34	Wiper, to an ADC pin (prefer ADC1: GPIO 32 to 39)
GND	Ground	GND

Suggested wiring for the 30-pin ESP32 DevKit, avoiding flash, input-only and strapping pins. BoardPilot checks it for you as you wire.

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

void loop() {
  int mv = analogReadMilliVolts(34);  // OUT on GPIO 34
  Serial.println(mv);
  delay(200);
}

Part data: CC BY 4.0, free to reuse with credit to BoardPilot.