copy_of_sit315_seminar_21(CHANGED).txt

//Global constants
const uint8_t BTN_PIN = 2;
const uint8_t LED_PIN = 13;

//Global variables
uint8_t buttonPrevState = LOW;
uint8_t ledState = LOW;

//Setup function
void setup()
{
  //Set Button input
  pinMode(BTN_PIN, INPUT_PULLUP);
  //Set LED output
  pinMode(LED_PIN, OUTPUT);
  //Set serial
  Serial.begin(9600);
}

void loop()
{
  //Set button state
  uint8_t buttonState = digitalRead(BTN_PIN);
  
  //Print button state, led state
  if(buttonState == 0)
  {
    Serial.println("Button not pressed");
  }
  if(buttonState == 1)
  {
    Serial.println("Button pressed");
    Serial.println("LED ON");  
  }
  
  //Check if button is pressed if so change led state
  if(buttonState != buttonPrevState)
  {
    ledState = !ledState;
    digitalWrite(LED_PIN, ledState);
  }
  
  buttonPrevState = buttonState;
    
  //Add delay to help simulation
  delay(500);
}