Make: Wearable Electronics, 2nd Edition

145Chapter 6: Microcontrollers

void setup() {

// initialize serial communication at 9600 bps

Serial.begin(9600);

}

void loop() {

// read pin and store value in a variable:

lightSensorValue = analogRead(lightSensorPin);

// print the light sensor value:

Serial.println(lightSensorValue);

// delay between readings:

delay(100);

}

Check your board type and serial port, and upload the code. Open your

Serial Monitor and make sure your baud rate is set to 9600, and you should

see sensor values on the screen!

Notice how as you cover and uncover the sensor, the values on screen

change. Try moving the circuit toward a very bright light and try covering it

compl ...