Add exit clean up

rpi/main.py

@@ -21,22 +21,45 @@ def start_party():
     print("Party started!")
     pass
 
+def exit_app():
+    rfid_reader.stop()
+    light_sensor_reader.stop()
+    exit()
+
 if __name__ == "__main__":
 
+    try :
+        print("Starting app...")
+
         screen.enableBackground()
         screen.displayMessage("Waiting for scan...")
 
+        print("Screen enabled.")
+
         rfid_reader.subscribe(lambda uid: mqtt_service.publish(
             "rpi", "/board-mate/rfid/scan", str(uid), 0
         ))
         rfid_reader.start()
 
-    rfid_reader.subscribe(lambda light_value: mqtt_service.publish(
+        print("RFID reader started.")
+
+        light_sensor_reader.subscribe(lambda light_value: mqtt_service.publish(
             "rpi", "/board-mate/light/notify", str(light_value), 0
         ))
         light_sensor_reader.start()
+        print("Light sensor reader started.")
 
         app.run(host="0.0.0.0", port=5000, debug=False)
+        print("Server started.")
+
+    except KeyboardInterrupt:
+        print("Keyboard interrupt. Stopping app...")
+        exit_app()
+
+    except Exception as e:
+        print(e)
+        exit_app()
+
 
 
 """