Add include guards and use explicit inclusions

src/BluetoothLEDCallback.cpp

@@ -1,3 +1,6 @@
+#ifndef BluetoothLEDCallback_cpp
+#define BluetoothLEDCallback_cpp
+
 #include "BluetoothLightControl.cpp"
 #include <BLEUtils.h>
 
@@ -18,3 +21,5 @@ class BluetoothLEDCallback : public BLECharacteristicCallbacks {
 		_lightControl = lightControl;
 	}
 };
+
+#endif

src/BluetoothLightControl.cpp

@@ -1,4 +1,6 @@
-#include "LED.cpp"
+#ifndef BluetoothLightControl_cpp
+#define BluetoothLightControl_cpp
+
 #include "LedManager.cpp"
 #include <map>
 
@@ -29,3 +31,5 @@ class BluetoothLightControl{
 		}
 	}
 };
+
+#endif

src/BluetoothService.cpp

@@ -1,3 +1,6 @@
+#ifndef BluetoothService_cpp
+#define BluetoothService_cpp
+
 #include <Arduino.h>
 #include <BLEDevice.h>
 #include <BLEServer.h>
@@ -46,3 +49,5 @@ public:
 		BLEDevice::startAdvertising();
 	}
 };
+
+#endif

src/LedManager.cpp

@@ -1,3 +1,6 @@
+#ifndef LedManager_cpp
+#define LedManager_cpp
+
 #include "LED.cpp"
 #include "TimerManager.cpp"
 #include <map>
@@ -34,3 +37,5 @@ public:
 			_timers->reset(id, timer);
 	}
 };
+
+#endif

src/Timer.cpp

@@ -1,3 +1,6 @@
+#ifndef Timer_cpp
+#define Timer_cpp
+
 #include <Arduino.h>
 #include <functional>
 
@@ -31,3 +34,5 @@ public:
 		}
 	}
 };
+
+#endif

src/TimerManager.cpp

@@ -1,3 +1,6 @@
+#ifndef TimerManager_cpp
+#define TimerManager_cpp
+
 #include <map>
 #include <functional>
 #include "Timer.cpp"
@@ -25,3 +28,5 @@ class TimerManager{
 		}
 	}
 };
+
+#endif

src/main.cpp

@@ -1,6 +1,9 @@
 #include "LED.cpp"
 #include "BluetoothLEDCallback.cpp"
+#include "BluetoothLightControl.cpp"
 #include "BluetoothService.cpp"
+#include "LedManager.cpp"
+#include "TimerManager.cpp"
 #include <Arduino.h>
 
 #define FADE_IN_DURATION 500