GY-61 ADXL335 analog accelerometer with ESP32

Supply 3.3-5 V Bus ANALOG Measures acceleration

Pins and ESP32 wiring

Pin	Role	ESP32 pin	Notes
VCC	Power	3V3
X	Analog output	D34	To an ADC pin (prefer ADC1: GPIO 32 to 39)
Y	Analog output	D35	To an ADC pin (prefer ADC1: GPIO 32 to 39)
Z	Analog output	VP	To an ADC pin (prefer ADC1: GPIO 32 to 39)
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.

void setup() { Serial.begin(115200); }

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

Analog Devices ADXL335 datasheet, Ratiometric analog outputs XOUT, YOUT, ZOUT; about 300 mV/g at 3 V

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