433 MHz receiver (XY-MK-5V) with ESP32

Supply 5 V Bus GPIO

Pins and ESP32 wiring

Pin	Role	ESP32 pin	Notes
VCC	Power	VIN	5 V only (4.5 to 5.5 V)
DATA	Output (the part drives it)	D25	Data output at 5 V level: use a voltage divider before the ESP32
DATA2	Not wired to the ESP32	—	Same signal as DATA (joined on the board)
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.

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);  // DATA
}

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

XY-MK-5V 433 MHz receiver module datasheet, Pins VCC, DATA, DATA, GND; supply 5 V DC

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