gistfile1.txt

/*
  ReadAnalogVoltage
  Reads an analog input on pin 0, converts it to voltage, and prints the result to the serial monitor.
  Attach the center pin of a potentiometer to pin A0, and the outside pins to +5V and ground.
 
 This example code is in the public domain.
 */

// the setup routine runs once when you press reset:
void setup() {
  // initialize serial communication at 9600 bits per second:
  Serial.begin(9600);
}

// the loop routine runs over and over again forever:
void loop() {
  // read the input on analog pin 0:
  int sensorValue = analogRead(A0);
  // Convert the analog reading (which goes from 0 - 1023) to a voltage (0 - 5V):
  float voltage = sensorValue * (5.0 / 1023.0);
  // print out the value you read:
  int sensorValue1 = analogRead(A0) * (5.0 / 1023.0);
  int sensorValue2 = analogRead(A1) * (5.0 / 1023.0);
  int sensorValue3 = analogRead(A2) * (5.0 / 1023.0);
  int sensorValue4 = analogRead(A3) * (5.0 / 1023.0);
   
  if (sensorValue1 == 5)
  {
    Serial.println("sensor 1");
    delay(200);
  }
  
  if (sensorValue2 == 5)
  {
    Serial.println("sensor 2"); 
    delay(200);
  }
  
  if (sensorValue3 == 5)
  {
    Serial.println("sensor 3") ; 
    delay(200);
  }
  
  if (sensorValue4 == 5)
  {
    Serial.println("sensor 4") ; 
    delay(200);
  }
  delay(50);
}