Arduino code for DND button

dnd_button-itsybitsy

#include <Keyboard.h>

// DND Button Config
const int dndButtonPin = 13;
const int dndLedPin = 11;
int dndButtonState = 0;
int dndLastButtonState = HIGH;
int dndButtonStateCounter = 0;

void setup() {
  pinMode(dndLedPin, OUTPUT);
  pinMode(dndButtonPin, INPUT);
  digitalWrite(dndButtonPin, HIGH); // Fix to stablize button state

  Keyboard.begin();
}
 
// the loop function runs over and over again forever
void loop() {
  // DND Button Loop
  dndButtonState = digitalRead(dndButtonPin);
  
  if (dndButtonState != dndLastButtonState) {
    dndButtonStateCounter = 0;
    
    if(dndButtonState == LOW) {
      // Serial.println("LOW");
      // Turn on LED
      digitalWrite(dndLedPin, HIGH);
    } else {
      // Serial.println("HIGH");
      // Turn off LED
      digitalWrite(dndLedPin, LOW);
    } 
  } else {
    dndButtonStateCounter++;

    if(dndButtonStateCounter == 10) {
      if(dndButtonState == LOW) {
        // Serial.println("START DND");
        keyboardStartDND();
      } else if (dndButtonState == HIGH) {
        // Serial.println("END DND");
        keyboardEndDND();
      }
    }    
  }

  dndLastButtonState = dndButtonState;

  delay(100);
}

void openTerminal() {
  Keyboard.press(KEY_LEFT_GUI);
  delay(100); 
  Keyboard.press(' '); 
  delay(100);
  Keyboard.releaseAll();
  delay(500);
  Keyboard.print("terminal");
  delay(500);
  Keyboard.press(KEY_RETURN);
  Keyboard.release(KEY_RETURN);
  delay(500);
}

void keyboardStartDND() {
  openTerminal();
  Keyboard.println("dnd.sh on");
}

void keyboardEndDND() {
  openTerminal();
  Keyboard.println("dnd.sh off");
}