Analog joystick (KY-023) with ESP32

Supply 3.3 V Bus ANALOG

Pins and ESP32 wiring

Pin	Role	ESP32 pin	Notes
GND	Ground	GND
+5V	Power	3V3	Connect to 3V3 anyway, so the outputs stay within the ADC range
VRX	Analog output	D34	To an ADC pin (prefer ADC1: GPIO 32 to 39)
VRY	Analog output	D35	To an ADC pin (prefer ADC1: GPIO 32 to 39)
SW	Output (the part drives it)	D25	Button: LOW when pressed. Use INPUT_PULLUP

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); }

void loop() {
  int mv = analogReadMilliVolts(34);  // VRX on GPIO 34
  Serial.println(mv);
  delay(200);
}

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