 #define LCD_RIGHT_ARROW 4
 
 #define SERVO_PIN 11
-#define LCD_SHIELD_CMD_PIN 14 //A0
+#define LCD_SHIELD_CMD_PIN 14 // A0
 #define BRAKE_PIN 15          // A1
 #define THROTTLE_PIN 16       // A2
 #define LCD_PIN_1 8

boolean calibration_mode = false;
unsigned int calibration_item = 0;

int menu_items_number = 12;
const char* line1_options[3] = {"Angle", "Throttle", "Brake"};
const char* line2_options[2] = {"Throt-Brake", "Angle"};

// non blocking ops times
unsigned long execution_intervals[4][2]; // 4 intervals(servo bluetooth, drawscreen & nunchuk), with 2 values each(duration, last)

/* Main loop */
void loop() {

  draw_menu();

  if (!calibration_mode) {
    acquire_data();
