IR obstacle sensor (FC-51) with ESP32

Supply 3.3-5 V Bus GPIO

Pins and ESP32 wiring

Pin	Role	ESP32 pin	Notes
OUT	Output (the part drives it)	D25	LOW when an obstacle is in front
GND	Ground	GND
VCC	Power	3V3

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);
  pinMode(25, INPUT);  // OUT
}

void loop() {
  Serial.println(digitalRead(25));
  delay(100);
}

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