changed the brightness of the middle setting from 7 to 5

GPSSpeedMultiCore.ino

@@ -9,6 +9,7 @@
 #define GPS_WAIT_TIME 1100
 #define GPS_UPDATE_FREQUENCY 10  //GPS update frequency per sec
 #define DEBOUNCE_DELAY 250       //time in ms
+#define MIDDLE_SCREEN_BRIGHTNESS 5
 
 //GPS
 SFE_UBLOX_GPS myGPS;
@@ -92,8 +93,8 @@ void loop() {
   //change brightness
   if (buttonPushed == true) {
     if (screenBrightness == 15) {
-      screenBrightness = 7;
-    } else if (screenBrightness == 7) {
+      screenBrightness = MIDDLE_SCREEN_BRIGHTNESS;
+    } else if (screenBrightness == MIDDLE_SCREEN_BRIGHTNESS) {
       screenBrightness = 0;
     } else {
       screenBrightness = 15;