#define ADC_PIN 36
#define ADC_RESOLUTION 4096.0
#define R1 7500
#define R2 30000
#define REF_VOLT 3.3

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");

  // set the ADC attenuation to 11 dB (up to ~3.3V input)
  // analogSetAttenuation(ADC_11db);
}

void loop() {
  // put your main code here, to run repeatedly:
  float adc_val = (float) analogRead(ADC_PIN);
  Serial.println(adc_val);
  float volt_adc = (REF_VOLT * adc_val) / ADC_RESOLUTION;
  Serial.println(adc_val);
  float volt_read = volt_adc * ((R1 + R2) / R1);
  Serial.print("Measured Voltage = ");
  Serial.println(volt_read, 2);
  delay(3000); // this speeds up the simulation
}