delay(400);
 sensorValue = analogRead(A0);
Serial.print("sensor Value: ");
Serial.print(sensorValue);
// convert the ADC reading to voltage
float voltage = (sensorValue/1023.0) * 5.0;
float resistance = ((4700 * voltage) / (5 - voltage));
Serial.print(", Resistance: ");
Serial.println(resistance);
// Send the voltage level out the Serial port
Serial.print(", Volts: ");
Serial.print(voltage);