# coding: utf-8 # last modified:20220824 import time import serial import re utctime = '' lat = '' ulat = '' lon = '' ulon = '' numSv = '' msl = '' cogt = '' cogm = '' sog = '' kph = '' gps_t = 0 ser = serial.Serial("/dev/ttyUSB0", 9600) if ser.isOpen(): print("GPS Serial Opened! Baudrate=9600") else: print("GPS Serial Open Failed!") def Convert_to_degrees(in_data1, in_data2): len_data1 = len(in_data1) str_data2 = "%05d" % int(in_data2) temp_data = int(in_data1) symbol = 1 if temp_data < 0: symbol = -1 degree = int(temp_data / 100.0) str_decimal = str(in_data1[len_data1-2]) + str(in_data1[len_data1-1]) + str(str_data2) f_degree = int(str_decimal)/60.0/100000.0 # print("f_degree:", f_degree) if symbol > 0: result = degree + f_degree else: result = degree - f_degree return result def GPS_read(): global utctime global lat global ulat global lon global ulon global numSv global msl global cogt global cogm global sog global kph global gps_t if ser.inWaiting(): if ser.read(1) == b'G': if ser.inWaiting(): if ser.read(1) == b'N': if ser.inWaiting(): choice = ser.read(1) if choice == b'G': if ser.inWaiting(): if ser.read(1) == b'G': if ser.inWaiting(): if ser.read(1) == b'A': #utctime = ser.read(7) GGA = ser.read(70) GGA_g = re.findall(r"\w+(?=,)|(?<=,)\w+", str(GGA)) # print(GGA_g) if len(GGA_g) < 13: print("GPS no found") gps_t = 0 return 0 else: utctime = GGA_g[0] # lat = GGA_g[2][0]+GGA_g[2][1]+'°'+GGA_g[2][2]+GGA_g[2][3]+'.'+GGA_g[3]+'\'' lat = "%.8f" % Convert_to_degrees(str(GGA_g[2]), str(GGA_g[3])) ulat = GGA_g[4] # lon = GGA_g[5][0]+GGA_g[5][1]+GGA_g[5][2]+'°'+GGA_g[5][3]+GGA_g[5][4]+'.'+GGA_g[6]+'\'' lon = "%.8f" % Convert_to_degrees(str(GGA_g[5]), str(GGA_g[6])) ulon = GGA_g[7] numSv = GGA_g[9] msl = GGA_g[12]+'.'+GGA_g[13]+GGA_g[14] #print(GGA_g) gps_t = 1 return 1 elif choice == b'V': if ser.inWaiting(): if ser.read(1) == b'T': if ser.inWaiting(): if ser.read(1) == b'G': if gps_t == 1: VTG = ser.read(40) VTG_g = re.findall(r"\w+(?=,)|(?<=,)\w+", str(VTG)) cogt = VTG_g[0]+'.'+VTG_g[1]+'T' if VTG_g[3] == 'M': cogm = '0.00' sog = VTG_g[4]+'.'+VTG_g[5] kph = VTG_g[7]+'.'+VTG_g[8] elif VTG_g[3] != 'M': cogm = VTG_g[3]+'.'+VTG_g[4] sog = VTG_g[6]+'.'+VTG_g[7] kph = VTG_g[9]+'.'+VTG_g[10] #print(kph) try: while True: if GPS_read(): print("*********************") print('UTC Time:'+utctime) print('Latitude:'+lat+ulat) print('Longitude:'+lon+ulon) print('Number of satellites:'+numSv) print('Altitude:'+msl) print('True north heading:'+cogt+'°') print('Magnetic north heading:'+cogm+'°') print('Ground speed:'+sog+'Kn') print('Ground speed:'+kph+'Km/h') print("*********************") except KeyboardInterrupt: ser.close() print("GPS serial Close!")
标签：ser,VTG,python,global,read,GGA,串口,print,gps From： https://www.cnblogs.com/oftenlin/p/17375176.html