static void button_event_handler(uint8_t pin_no, uint8_t button_action)
{
        uint32_t err_code;
  
    switch (pin_no)
    {
           	case LEDBUTTON_BUTTON_PIN:
                      switch (button_action)
                      {
                             case APP_BUTTON_PUSH:
                                  // Do your task
                             break;
                            case APP_BUTTON_RELEASE:
                                  // Do your task
                            break;
		  default:
                                break;
                       }
              break;
              default:
              APP_ERROR_HANDLER(pin_no);
              break;	
    }
}