我得到了返回 NMEA 数据的 GPS 模块。当我尝试使用以下代码打印它返回的所有数据时,我得到了这个.
while True:
try:
rcv = port.read()
print rcv
然后,我做了一些修改,可以更清晰地读取 NMEA 数据。它看起来像这样:
port = serial.Serial("/dev/ttyAMA0", baudrate=9600, timeout=10.0)
line = []
print("connected to: " + port.portstr)
while True:
try:
rcv = port.read()
except:
rcv = ''
line.append(rcv)
if rcv == '\n':
line = "".join(line)
print line
line = []
输出如下所示:
$GPGGA,183345.000,5023.3424,N,01857.3817,E,1,7,1.25,313.3,M,42.1,M,,*53
$GPGSA,A,3,09,26,28,08,15,18,17,,,,,,1.52,1.25,0.88*06
$GPRMC,183345.000,A,5023.3424,N,01857.3817,E,0.40,55.07,050214,,,A*54
$GPVTG,55.07,T,,M,0.40,N,0.74,K,A*0D
$GPGGA,183346.000,5023.3423,N,01857.3817,E,1,7,1.25,313.3,M,42.1,M,,*57
$GPGSA,A,3,09,26,28,08,15,18,17,,,,,,1.52,1.25,0.88*06
问题是有时它会遗漏一些逗号或其他数据,并且 NMEA 解析器读取错误。有没有更好更干净的方法来通过串行读取整个 NMEA 帧?