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我想使用此代碼將我的gps數據流式傳輸到谷歌地球。我已經嘗試過用於python 3.4的版本，但是我得到了錯誤，有人說gps3並沒有真正適用於python3，所以我嘗試使用python2ValueError：無法將字符串轉換爲浮動/usr/lib/python2.7/string.py
python 2.7的代碼用於顯示Google earth中的GPS流 ＃！的/ usr/bin中/ Python的
# Copyright (C) 2007 by Jaroslaw Zachwieja <grok!warwick.ac.uk>
# Copyright (C) 2008 by TJ <linux!tjworld.net>
# Published under the terms of GNU General Public License v2 or later.
# License text available at http://www.gnu.org/licenses/licenses.html#GPL
import serial
import string
import sys
import getopt
def usage():
print ("Usage:")
print (" -p | --port <device> e.g. /dev/serial0")
print (" -b | --baud <speed> e.g. 9600")
print (" -f | --file <filename> e.g. /tmp/gps.kml")
print (" -h | --help display options")
def main():
# defaults
serial_port = "/dev/serial0"
serial_baud = 9600
file = './realtime/Realtime GPS.kml'
try:
opts, args = getopt.getopt(sys.argv[1:], "p:b:f:h", ["port=", "baud=", "file=", "help"])
except getopt.GetoptError:
usage()
sys.exit(1)
else:
for opt, arg in opts:
if opt in ("-p", "--port"):
serial_port = arg
elif opt in ("-b", "--baud"):
serial_baud = string.atof(arg)
elif opt in ("-f", "--file"):
file = arg
elif opt in ("-h", "--help"):
usage()
sys.exit(0)
else:
print ("Unknown option")
gps = serial.Serial(serial_port, serial_baud, timeout=1)
print "Serving data from %s (%d baud) to %s" % (serial_port, serial_baud, file)
latitude = 0
longitude = 0
speed = 0
heading_in = 0
altitude = 0
range = 1000
tilt = 30
while 1:
line = gps.readline()
datablock = line.split(',')
print datablock
if line[0:6] == '$GPRMC':
latitude_in = string.atof(datablock[3])
longitude_in = string.atof(datablock[5])
try:
altitude = string.atof(datablock[8])
except ValueError: # use last good value
altitude = altitude
speed_in = string.atof(datablock[7])
try:
heading_in = string.atof(datablock[8])
except ValueError:
# use last good value
heading_in = heading_in
if datablock[4] == 'S':
latitude_in = -latitude_in
if datablock[6] == 'W':
longitude_in = -longitude_in
latitude_degrees = int(latitude_in/100)
latitude_minutes = latitude_in - latitude_degrees*100
longitude_degrees = int(longitude_in/100)
longitude_minutes = longitude_in - longitude_degrees*100
latitude = latitude_degrees + (latitude_minutes/60)
longitude = longitude_degrees + (longitude_minutes/60)
speed = int(speed_in * 1.852)
range = ((speed/100 ) * 350) + 650
tilt = ((speed/120) * 43) + 30
heading = heading_in
if speed < 10:
range = 200
tilt = 30
heading = 0
output = """<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://earth.google.com/kml/2.0">
<Placemark>
<name>%s km/h</name>
<description>^</description>
<LookAt>
<longitude>%s</longitude>
<latitude>%s</latitude>
<range>%s</range>
<tilt>%s</tilt>
<heading>%s</heading>
</LookAt>
<Point>
<coordinates>%s,%s,%s</coordinates>
</Point>
</Placemark>
</kml>""" % (speed,longitude,latitude,range,tilt,heading,longitude,latitude,altitude)
f=open(file, 'w')
f.write(output)
f.close()
ser.close()
if __name__ == "__main__":
main()
我添加了這行打印數據塊，在這裏你可以看到它打印。
Serving data from /dev/serial0 (9600 baud) to ./realtime/Realtime GPS.kml
['\x14\xd5\xd4\x95\x15\x89b\x8ab\x8a\x9ab\x82\x8ab\x8a\x8ab\x82\x82\x8abb\x82\xb2b\x8a\x8ab\x8a\x82\x9abb\x8a\x82b\x8a\x82b\x92\xba\x92bb\x8a\x92b\xb2\x92b\x92\x92\x82b\x92\x92R\xba\n']
['5)\x91\x1dA\x1dMY\xb1\xd1\xb1\xc9\xb1\xc5\xcd\xb1\xc5\xd1\xb1\xc5\xe5\xb1\xcd\xc9\xc5\xb1\xb1\xc5\xd5\xb1\xc5\xc1\xb1\xc5\xe1\xd9\xb1\xb1\xc5\xdd\xb1\xcd\xd9\xb1\xc1\xd5\xd5\xb1\xb1\xc5\xe5\xb1\xd1\xdd\xb1\xc1\xe1\xc5\xb1\xc9\xc1\xa9\xdd\xe55)\x91\x1dA\x1dMY\xb1\xd1\xb1\xcd\xb1\xc5\xcd\xb1\xc9\xc9\xb1\xc1\xe5\xb1\xc1\xc1\xd1\xb1\xb1\xc9\xd1\xb1\xd9\xdd\xb1\xc5\xd9\xd9\xb1\xc9\xe1\xb1\xc9\xd5\xb1\xc9\xc1\xb1\xc9\xd1\xc5\xb1\xc9\xc1\xb1\xc9\xd9\xb1\xb1\xb1\xc9\xc9\xa9\xd1\xe55)\x91\x1dA\x1dMY\xb1\xd1\xb1\xd1\xb1\xc5\xcd\xb1\xcd\xc9\xb1\xcd\xd5\xb1\xcd\xc1\xd1\xb1\xc9\xc9\xa9\xd1\t5)\x91\x1dA\x1d11\xb1\xb1\xb1\xb1\xb1\xc5\xc5\xd5\xd5\xcd\xdd\xb9\xc1\xc1\xb1Y\xb19\xa9\xd1\x155)\x91\x1dA\x1dMQ\xb1\xc5\xc5\xd5\xd5\xcd\xdd\xb9\xc1\xc1\xb1\xc1\xb9\xc1\xc1\xc1\xc1\xb1\xb1\xb1\xb1\xc5\xcd\xc1\xd9\xb1\xc5\xc5\xe5\xd1\xb1\xc5\xc9\xc9\xd5\xa9\xd9\x155)\x91\x1dAi\x11\x05\xb1\xc5\xc5\xd5\xd5\xcd\xdd\xb9\xc1\xc1\xb1\xc9\xe1\xb1\xc1\xd1\xb1\xc9\xc1\xc5\xdd\xb1\xc1\xc1\xb1\xc1\xc1\xa9\xd9\xe15)\x91\x1dA\x1d\tM\xb1\xc5\xc5\xd5\xd5\xcd\xdd\xb9\xc1\xc1\xb1\xb1\xb1\xb1\xb1\xb1\xb1\xa9\xd9\t5)\xff$GPRMC', '115538.00', 'V', '', '', '', '', '', '', '280417', '', '', 'N*7E\r\n']
['$GPVTG', '', '', '', '', '', '', '', '', 'N*30\r\n']
['$GPGGA', '115538.00', '', '', '', '', '0', '00', '99.99', '', '', '', '', '', '*6D\r\n']
['$GPGSA', 'A', '1', '', '', '', '', '', '', '', '', '', '', '', '', '99.99', '99.99', '99.99*30\r\n']
['$GPGSV', '4', '1', '13', '01', '11', '001', '', '06', '11', '103', '', '10', '10', '272', '', '12', '62', '220', '22*7A\r\n']
['$GPGSV', '4', '2', '13', '14', '19', '321', '', '15', '10', '186', '21', '17', '36', '055', '', '19', '47', '081', '21*7B\r\n']
['$GPGSV', '4', '3', '13', '22', '09', '004', '', '24', '67', '166', '29', '25', '20', '241', '18', '26', '', '', '22*43\r\n']
['$GPGSV', '4', '4', '13', '32', '35', '304', '22*4B\r\n']
['$GPGLL', '', '', '', '', '115538.00', 'V', 'N*41\r\n']
['$GPGST', '115538.00', '0.0000', '', '', '', '1305', '1193', '1224*64\r\n']
['$GPZDA', '115538.00', '28', '04', '2017', '00', '00*67\r\n']
['$GPGBS', '115538.00', '', '', '', '', '', '', '*64\r\n']
['$GPRMC', '115539.00', 'V', '', '', '', '', '', '', '280417', '', '', 'N*7F\r\n']
Traceback (most recent call last):
File "/home/pi/gegpsd0.2.2", line 120, in <module>
main()
File "/home/pi/gegpsd0.2.2", line 59, in main
latitude_in = string.atof(datablock[3])
File "/usr/lib/python2.7/string.py", line 382, in atof
return _float(s)
ValueError: could not convert string to float:
>>>
請幫
'數據塊[3]'不代表十進制數。 –
請提供一個最小，完整和可驗證的示例，請參閱https://stackoverflow.com/help/mcve – Setop
我會嘗試打印'datablock'，因爲我懷疑它得到的不是它所期望的（正如Peter Wood提到的）。此代碼已有近十年的歷史。 – TemporalWolf