// Beispiel: Benutzung des ADC am ESP32

// define pin for reading analog values from the potentiometer
const int potPin = 32;
// define the resolution of the ADV
const int resolution = 9;

// variable to save the actual ADC reading
int potValue = 0;
// value to save the actual calculated voltage
float voltValue = 0;

// setup runs once during startup
void setup() {
  //set the speed of the serial interface
  Serial.begin(115200);
  // set the resolution global for all ADC inputs
  analogReadResolution(resolution);
  // set the attenuation (input value from 0 to 1300mV)
  analogSetAttenuation(ADC_6db);
}

void loop() {
  // read (convert) the analog value to a int value between 0 and 511 (2^9 values)
  potValue = analogRead(potPin);
  // write the value
  Serial.println(potValue);

  // calculate the voltage based on the actual ADC reading
  voltValue = (potValue * 3.3) / (pow(2, resolution));
  Serial.println("voltage: " + String(voltValue ));

  delay(1000); // this speeds up the simulation
}