LPD3806 incremental encoder 600 P/R (A/B) with ESP32

Supply 5-24 V Bus GPIO Measures rotation, position, speed

Pins and ESP32 wiring

Pin	Role	ESP32 pin	Notes
VCC	Power	3V3	Red wire. Needs 5 to 24 V: use VIN (5 V)
GND	Ground	GND	Black wire
A	Output (the part drives it)	D25	Green wire. NPN open collector: use INPUT_PULLUP or 4.7 kΩ to 3V3, never to VCC
B	Output (the part drives it)	D26	White wire. NPN open collector: use INPUT_PULLUP or 4.7 kΩ to 3V3, never to VCC
SHIELD	Not wired to the ESP32	—	Bare wire. Leave unconnected or tie to 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);
  pinMode(25, INPUT);  // A
}

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

LPD3806-600BM-G5-24C seller datasheet, Supply 5 to 24 V DC; NPN open-collector A/B outputs; 600 pulses per revolution

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