Arduino Lesson 3 – RUNSHI WEI

Digital input

serial monitor

Two button control one LED

const int buttonPin = 2;     // the number of the pushbutton pin
const int ledPin =  13; // the number of the LED pin
const int buttonPinoff = 3;

// variables will change:
int buttonState = 0;// variable for reading the pushbutton status
int buttonState1 = 0;

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

void loop() {
  // read the state of the pushbutton value:
  buttonState = digitalRead(buttonPin);
  buttonState1 = digitalRead(buttonPinoff);

  // check if the pushbutton is pressed. If it is, the buttonState is HIGH:
  if (buttonState == LOW) {
    // turn LED on:
    digitalWrite(ledPin, HIGH);
  }
  
  if (buttonState1 == LOW){
    digitalWrite(ledPin, LOW);
  }
}