E18-D80NK IR proximity switch (3-80 cm) with ESP32

Supply 5 V Bus GPIO Measures proximity, presence

Pins and ESP32 wiring

Pin	Role	ESP32 pin	Notes
VCC	Power	VIN	Brown wire. Needs 5 V: use VIN
GND	Ground	GND	Blue wire
OUT	Output (the part drives it)	D25	Black wire. LOW when an object is near. Can idle at 5 V: measure first, use a divider or level shifter

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

This module is sold for 5 V. Its outputs may be 5 V: use a level shifter or a voltage divider on ESP32 inputs.

void setup() {
  Serial.begin(115200);
  pinMode(25, INPUT);  // OUT
}

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

E18-D80NK seller datasheet, Supply 5 V; NPN normally-open output; range 3 to 80 cm (adjustable)

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