/*
  Switch and LED
 
 Sends HIGH or LOW to serial monitor, when pressing a pushbutton attached to pin 2. 
 
 
 The circuit:
 * led attached to pin 3 with a 100 ohm resistor to ground
 * pushbutton attached to pin 2 from +5V
 * 10K resistor attached to pin 2 from ground
 
 */

// set pin numbers:
int buttonPin = 2;     // the number of the pushbutton pin
int ledPin = 3;

// variables will change:
int buttonState = 0;         // variable for reading the pushbutton status

void setup() {
  // initialize the pushbutton pin as an input:
  pinMode(buttonPin, INPUT);
  // initialize the led pin as an output:
  pinMode(ledPin, OUTPUT);

  // initialize the Serial communication
  Serial.begin(9600);  
}

void loop(){
  // read the state of the pushbutton value:
  buttonState = digitalRead(buttonPin);

  // check if the pushbutton is pressed.
  if (buttonState == HIGH) {
    // turn on LED by turning ledPin HIGH
    digitalWrite(ledPin, HIGH);
    // send HIGH to the serial monitor
    Serial.println("HIGH");
  } 
  else {
    // turn on LED by turning ledPin LOW
    digitalWrite(ledPin, LOW);
    // send LOW to the serial monitor
    Serial.println("LOW");
  }

}