// Teamskeyboard  Uses ATTiny85 with some hardware keys to send Teams Hotkeys
// frank@carius.de  www.mxxfaq.de
#include "DigiKeyboard.h"
#define SW1_PIN 0   // Pin with Switch 1 
#define LED_PIN 1   // Model A uses PIN1,  ModelB uses PIN0

int SW_debounce = 100;  // used to handle switch trigger

void setup() { // initialize the digital pin as an output.
  pinMode(LED_PIN, OUTPUT);        //LED on Model A
  pinMode(SW1_PIN, INPUT_PULLUP);  // Set input with Pullup
}

void loop() {  // endless main routine
  if (digitalRead(SW1_PIN) == LOW){
    if (SW_debounce > 0) {
      SW_debounce--;                        //debounce-logic Decrement Counter down to 0
    }
    if (SW_debounce == 1){                  // debounce-logic Send key once if 1 but not of lower
      digitalWrite(LED_PIN, HIGH);         // set signal LED to show switch status
      //DigiKeyboard.println("SendKey");
      //DigiKeyboard.sendKeyStroke(0);     // Prevents sometimes missing the first keystroke
      DigiKeyboard.sendKeyStroke(KEY_M , MOD_CONTROL_LEFT + MOD_SHIFT_LEFT); // Ctrl-Shift-M
      DigiKeyboard.delay(50);              // Wait a short time
    }
    else {
      DigiKeyboard.delay(100);               //  Wait before rechecking key status
    }
  }
  else {  // key not pressed and reset debounce counter
    // DigiKeyboard.println("HIGH");
    digitalWrite(LED_PIN, LOW);
    SW_debounce = 5;                        // Reset key Countdown to 5
    DigiKeyboard.delay(100);               // Wait before rechecking key status
  }
}