Arcade button 30 mm with LED with ESP32

Supply 3.3-5 V Bus GPIO

Pins and ESP32 wiring

Pin	Role	ESP32 pin	Notes
COM	Ground	GND	Switch common
NO	Output (the part drives it)	D25	Normally open: to a GPIO with INPUT_PULLUP, reads LOW when pressed
NC	Not wired to the ESP32	—	Normally closed, not needed
LED+	Not wired to the ESP32	—	LED anode. Built-in resistor for 5 V or 12 V: drive it through a transistor
LED-	Ground	GND	LED cathode

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);  // NO
}

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

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