4 6 and 8 button Macro pads

Arduino Pro Micro Code for 2x2 Macro Pad. Lock Screen Function was implemented for Linux.

//install HID-Project!
#include
#include

//dont user Keyboard Lib. it is already included in HID-Project
//#include

int SHIFT = 6; // SHIFT
int UP = 9; // Button for UP/NEXT
int DOWN = 8; // Button for DOWN/PREV
int USER = 7; // Free usable

void setup()
{
pinMode(SHIFT, INPUT_PULLUP); // Set the button as an input
pinMode(UP, INPUT_PULLUP); // Set the button as an input
pinMode(DOWN, INPUT_PULLUP); // Set the button as an input
pinMode(USER, INPUT_PULLUP); // Set the button as an input

Consumer.begin();

}

void loop()
{
if (digitalRead(SHIFT) == 0) // if the button goes low
{
if(digitalRead(UP) == 0)
{
Consumer.press(MEDIA_NEXT);
delay(200); // delay
}

if(digitalRead(DOWN) == 0)
{
  Consumer.press(MEDIA_PREVIOUS);
  delay(200);  // delay 
}   

if(digitalRead(USER) == 0)
{
  Consumer.press(MEDIA_PLAY_PAUSE);
  delay(200);  // delay 
}

}else{ // SHift is not pressed here
if(digitalRead(UP) == 0)
{
Consumer.press(MEDIA_VOLUME_UP);
delay(150); // delay
}

if(digitalRead(DOWN) == 0)
{
  Consumer.press(MEDIA_VOLUME_DOWN);
  delay(150);  // delay 
}

if(digitalRead(USER) == 0)
{
  lockScreen();             //Button release is done in this function
  delay(150);  // delay 
}

}

Consumer.releaseAll();
}

void lockScreen(void)
{
Keyboard.press(KEY_LEFT_CTRL);
Keyboard.press(KEY_LEFT_ALT);
Keyboard.write('l');
Keyboard.releaseAll();
}

void startLinuxTerminal(void)
{
Keyboard.press(KEY_LEFT_CTRL);
Keyboard.press(KEY_LEFT_ALT);
Keyboard.write('t');
Keyboard.releaseAll();
}

void startGVim()
{
startLinuxTerminal();
delay(1000);
Keyboard.println("gvim");
Keyboard.releaseAll();
delay(300);
Keyboard.press(KEY_LEFT_ALT);
Keyboard.press(KEY_F10);
Keyboard.releaseAll();
}