void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
}

void loop() {
  // put your main code here, to run repeatedly:
  int reading = analogRead(A0);
  float voltage = reading * (5.0 / 1023.0);
  Serial.print("Reading: ");
  Serial.println(reading);
  Serial.print("Voltage: ");
  Serial.println(voltage);
}