Hallo RN,
ich habe an meinem Raspberry einen GPS Sensor angebaut. Diesen habe ich so eingestellt das er alle 10 Sekunden ein NEMA Daten satz mit 9600 bps überträgt.
Nun habe ich das Problem das mein Raspberry die Daten Verpennt und nicht auswertet. Ich hatte den GPS Empfänger voher auf 1sec gestellt da lief es wunder bar. Ich habe auch überprüft ob es am GPS Empfänger liegt.
Aber er überträgt die Daten 100% richtig. Was kann ich ändern? Hier mein Script.
Code:#!/usr/bin/env python3 # -*- coding: utf-8 -*- import math import serial # Important definitions: PORT = "/dev/ttyAMA0" BAUD_RATE = 9600 LOG_FILE = "gpsdaten.txt" def read_nmea_record(ser): """Read a NMEA 0183 record from a serial connection.""" cr = False lf = False record = '$' while ser.read() != b'$': pass while not (cr and lf): byte = ser.read() if byte == b'\r': cr = True elif byte == b'\n': lf = True record = record + chr(ord(byte)) return record def get_gps_data(ser): """Get actual GPS data as a dictionary.""" try: record = "" while True: record = read_nmea_record(ser) print(record) fobj_out = open("/home/pi/uart_log.txt","a") fobj_out.write(record) fobj_out.close() if record.startswith('$GPGGA'): break tokens = record[7:-5].split(',') data = {} data['record_length'] = len(record)-2 data['utc_time'] = tokens[0][0:2] + ":" + tokens[0][2:4] + ":" + tokens[0][4:6] data['latitude'] = float(tokens[1][0:2]) + float(tokens[1][2:]) / 60 if tokens[2] == 'S': data['latitude_numeric'] = -data['latitude'] else: data['latitude_numeric'] = data['latitude'] data['latitude'] = "%.3f" % data['latitude'] + " " + tokens[2]; data['longitude'] = float(tokens[3][0:3]) + float(tokens[3][3:]) / 60 if tokens[4] == 'W': data['longitude_numeric'] = -data['longitude'] else: data['longitude_numeric'] = data['longitude'] data['longitude'] = "%.3f" % data['longitude'] + " " + tokens[4]; data['gps_quality'] = int(tokens[5]) data['satellite_count'] = int(tokens[6]) data['horizontal_dilution'] = float(tokens[7]) data['altitude'] = float(tokens[8]) data['geoidal_separation'] = float(tokens[10]) return data except: return None def print_header(): """Print the program header to stdout.""" print("") print("|---------------------------------------------------------------------|") print("|---------------------------------------------------------------------|") print("| *****************************GPS*******************************|") print("|---------------------------------------------------------------------|") print("|---------------------------------------------------------------------|") def print_gps_data(data): """Print the GPS data to stdout""" print("Laenge des Datensatzes:", data['record_length'], "Zeichen") print("Uhrzeit:", data['utc_time']) print("Breitengrad:", data['latitude']) print("Laengengrad:", data['longitude']) print("Hoehe ueber dem Meeresspiegel:", data['altitude']) print("GPS-Qualitaet:", data['gps_quality']) def log_gps_data(data): """Append the GPS data to the log file.""" log = open(LOG_FILE,"a+") log.write("___________________________________\n") log.write("Breitengrad: " + str(data['latitude']) + "\n") log.write("Laengengrad: " + str(data['longitude']) + "\n") log.write("Höhe: " + str(data['altitude']) + "\n") log.write("Zeit: " + str(data['utc_time']) + "\n") log.write("Satelliten: " + "%.3f" % data['satellite_count'] + "\n") log.write("Qualitaet: " + str(data['gps_quality']) + "\n") log.close(); # UART oeffnen UART = serial.Serial(PORT, BAUD_RATE) print_header() while True: data = get_gps_data(uart) if data: print_gps_data(data) log_gps_data(data)
14:47:54 $GPRMC,144754.00,A,5200.23778,N,01142.97998,E,1.06 2,227.70,190114,,,A*6E
14:47:54 $GPVTG,227.70,T,,M,1.062,N,1.967,K,A*31
14:47:54 $GPGGA,144754.00,5200.23778,N,01142.97998,E,1,09,1 .29,81.2,M,44.6,M,,*6B
14:47:54 $GPGSA,A,3,09,13,02,10,04,08,07,16,23,,,,2.12,1.29 ,1.68*03
14:47:54 $GPGSV,3,1,12,02,37,266,36,04,24,211,30,05,28,303, ,07,66,161,27*71
14:47:54 $GPGSV,3,2,12,08,37,192,24,09,33,203,30,10,79,217, 32,13,57,071,08*74
14:47:54 $GPGSV,3,3,12,16,22,048,16,23,25,081,25,26,01,259, ,29,05,325,*7F
14:47:54 $GPGLL,5200.23778,N,01142.97998,E,144754.00,A,A*60
14:48:04 $GPRMC,144804.00,A,5200.23680,N,01142.97782,E,0.44 3,227.70,190114,,,A*61
14:48:04 $GPVTG,227.70,T,,M,0.443,N,0.821,K,A*35
14:48:04 $GPGGA,144804.00,5200.23680,N,01142.97782,E,1,07,1 .49,86.0,M,44.6,M,,*6F
14:48:04 $GPGSA,A,3,09,02,10,04,08,07,23,,,,,,2.36,1.49,1.8 3*03
14:48:04 $GPGSV,3,1,12,02,37,266,35,04,24,211,26,05,28,303, ,07,66,161,26*74
14:48:04 $GPGSV,3,2,12,08,37,192,28,09,33,203,31,10,79,217, 33,13,57,071,*70
14:48:04 $GPGSV,3,3,12,16,22,048,10,23,25,081,26,26,01,259, ,29,05,325,*7A
14:48:04 $GPGLL,5200.23680,N,01142.97782,E,144804.00,A,A*69
Lesezeichen