Part 3. Light Sensor

The light sensor couldn't be easier to read from. The number it gives us is the ambient light level in Lux. You can test it with the sketch here:

https://github.com/InitialState/arduinosensorbox/blob/master/lighttest.ino

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

void loop() {
  int sensorValue = analogRead(0); 

  Serial.print("The light level is ");
  Serial.println(sensorValue);
  delay(1000);
}

Running this script will print the light level to the serial monitor. Try covering and uncovering the sensor to see how the light value changes. A good list of typical light levels for different environments can be found here: http://www.engineeringtoolbox.com/light-level-rooms-d_708.html

Now that we know all three sensors are working, we can move on to reading them all at once!

<< Part 3: PIR Motion Sensor - Part 4: Putting it All Together >>