„measurement_main.py“ ändern

Changes GPS monitoring to GPRMC.

measurement_main.py

         while ser.is_open:
             nmea_sentence = ser.readline() #GPRMC
             nmea_str = nmea_sentence.decode("utf-8")
-            if nmea_str.startswith("$GPGGA"):
+            if nmea_str.startswith("$GPRMC"):
                 write_to_file(output_file, nmea_str)
     except:
         if not ser.is_open: