change Serial1 to BT_SERIAL and add debug preprocessor commands to all debug prints to console

due_obd2/due_obd2.ino

@@ -22,6 +22,7 @@ Program to create a car monitor display using:
 #define PIN_BT_RX 19
 #define PIN_BT_TX 18
 #define PIN_BT_STATE 3 /* connected/disconnected state of BT */
+#define BT_SERIAL Serial1
 
 #define MS(x) x * 1000
 #define S(x) MS(x) * 1000
@@ -150,8 +151,9 @@ void on_init_enter()
     Timer3.attachInterrupt(update_ram_kb);
 
     logo_flag |= (1 << FLAG_LOGO_UPDATE);
-
+#if (DEBUG == 1)
     Serial.println("Entering init state!");
+#endif
 }
 
 void on_init_run()
@@ -275,7 +277,9 @@ void on_init_run()
 
 void on_init_exit()
 {
+#if (DEBUG == 1)
     Serial.println("Exiting init state!");
+#endif
     display.clrScr();
     Timer0.detachInterrupt();
     Timer0.stop();
@@ -289,13 +293,17 @@ void on_init_exit()
 
 void on_main_enter()
 {
+#if (DEBUG == 1)
     Serial.println("Entering main loop");
+#endif
 }
 
 void on_main_run()
 {
     delay(500);
+#if (DEBUG == 1)
     Serial.println("main!");
+#endif
 }
 
 void update_init_text()
@@ -338,7 +346,9 @@ void update_device_info()
                 init_device_info = DEV_RAM;
                 device_label_i = 0;
                 Timer3.start(50);
+#if (DEBUG == 1)
                 Serial.println("DEV RAM");
+#endif
             }
             break;
         case DEV_RAM:
@@ -421,7 +431,7 @@ void setup()
     Serial.begin(9600);
 #endif
     /* Serial1 is bluetooth module, pin 18 and 19. */
-    Serial1.begin(115200);
+    BT_SERIAL.begin(115200);
 
     /* Init display */
     display.InitLCD();