const int pHpin = A0;

void setup() {
  Serial.begin(9600);
}

void loop() {
  int adcValue = analogRead(pHpin);
  float voltage = adcValue * 5.0 / 1023.0;

  Serial.print("ADC: ");
  Serial.print(adcValue);
  Serial.print(" | Tegangan: ");
  Serial.print(voltage, 3);
  Serial.println(" V");

  delay(1000);
}