   delay(100);
   
   // send request to API if button pressed
-  for (int i=0; i<buttons_count; i++) {
+  for (int i=0; i<SIZE(buttons); i++) {
     if ( millis() - last_pressed_at > minimal_delay )
     {
       if(!button_was_pressed[i] && digitalRead(buttons[i]) == LOW) {
         #ifdef DEBUG_SWITCHER
           Serial.println("Button pressed!");
         #endif
-        digitalWrite( main_led_pin, HIGH );
+        control_led(HIGH);
         button_was_pressed[i] = true;
 
-        send_request_to_api( i+1 );
+        send_request_to_api( i );
         last_pressed_at = millis();
       }
 
       if(button_was_pressed[i] && digitalRead(buttons[i]) == HIGH)
       {
         button_was_pressed[i] = false;
-        digitalWrite( main_led_pin, LOW );
+        control_led(LOW);
       }
     } 
   }
-  
 }
 
 void setup_buttons()
 {
-  for (int i=0; i<buttons_count; i++) {
+  for (int i=0; i<SIZE(buttons); i++) {
     pinMode(buttons[i], INPUT);
     digitalWrite(buttons[i], HIGH); //internal pull-ups
   }


int send_request_to_api(int b_number)
{
  lights_url[11] = lights_url_by_button_number(b_number);
  set_headers();
  int status_code = client.get( lights_url );

  #ifdef DEBUG_SWITCHER
    Serial.println("GET query:");
    Serial.print(lights_url);
    Serial.print("Status code from server: ");
    Serial.println(status_code);
  #endif

  return status_code;
}

char* lights_url_by_button_number(int button_number)
{  
  switch (button_number) {
    case 0:
      return "/CMD?Smart_Switch_1=TOGGLE";
    case 1:
      return "/CMD?Smart_Switch_Day_Lights=TOGGLE";
    case 2:
      return "/CMD?Smart_Switch_Night_Lights=TOGGLE";
    default:
      return "";
  }
}

void sturtup_blink()
{
  for (int i=0; i<5; i++) {
    control_led(HIGH);
    delay(250);
    control_led(LOW);
    delay(250);
  }
}

void control_led(int state)
{
    #ifdef DEBUG_SWITCHER
      if(state == LOW)
        Serial.println("led is off");
      else
        Serial.println("led is on");
    #endif
    digitalWrite( status_led_pin, state );
}

