Write GPS data to a file using Python and GPSd

gpsDataWrite.py

# Runs perfectly using Python 2.7.3 on Raspian.		
# GPSD Official Documentation: 					  
# http://www.catb.org/gpsd/gpsd_json.html			

# Original GpsPoller script by Dan Mandle: 						  
# http://www.danmandle.com/blog/getting-gpsd-to-work-with-python/ 
# Original readCoordinates funtion by recantha:				      
# https://github.com/recantha/picorder-v3/blob/master/picorder.py 
# Additional modifications by Jacob Ilkka:						  
# http://blog.jacobilkka.com/python-gps-data-writer/
# https://gist.github.com/jilkka/c4d0d384ea659022e857046bbe0a5739



import os
import time
import math
import threading
from gps import *

gpsd = None #seting the global variable

class GpsPoller(threading.Thread):
	def __init__(self):
		threading.Thread.__init__(self)
		global gpsd #bring it in scope
		gpsd = gps(mode=WATCH_ENABLE) #starting the stream of info
		self.current_value = None
		self.running = True #setting the thread running to true

	def run(self):
		global gpsd
		while gpsp.running:
			gpsd.next() #this will continue to loop and grab EACH set of gpsd info to clear the buffer
 
if __name__ == '__main__':
	gpsp = GpsPoller() # create the thread
	try:
		gpsp.start() # start it up
		while True:

			def readCoordinates():
				lat = gpsd.fix.latitude
				lon = gpsd.fix.longitude
				speed = float("{0:.2f}".format(gpsd.fix.speed / .44704)) # convert to mph
				alt = float("{0:.2f}".format(gpsd.fix.altitude / .3048)) # convert to feet
				climb = float("{0:.2f}".format(gpsd.fix.climb / .3048))  # convert to ft/s
				track = gpsd.fix.track
				fixtype = gpsd.fix.mode

				if (math.isnan(lat)):
					lat = "No fix"

				if (math.isnan(lon)):
					lon = "No fix"

				if (math.isnan(speed)):
					speed = "No fix"
				else:
					speed = "%s mph" % speed

				if (math.isnan(alt)):
					alt = "No fix"
				else:
					alt = "%s ft" % alt

				if (math.isnan(climb)):
					climb = "N/A"
				else:
					climb = "%s ft/s" % climb

				if (math.isnan(track)):
					track = "%s'" % track
				else:
					track = "No Track"

				if fixtype == 1:
					fixtype = "No Fix"
				else:
					fixtype = "%sD" % fixtype

				coords = [lat, lon, alt, speed, climb, track, fixtype]

				return coords

			coords = readCoordinates()
			d = open('currentData.py', 'w')
			d.write('# currentData.py \n \ncoords = %s' % coords)
			d.close()

			print "\n \n"
				
			latitude = coords[0]
			longitude = coords[1]
			altitude = coords[2]
			heading = coords[5]
			speed = coords[3]
			climb = coords[4]
			fi = coords[6]

			print "Latitude:  ", latitude
			print "Longitude: ", longitude
			print "Elevation: ", altitude
			print "Heading:   ", heading
			print "Speed:     ", speed
			print "Climb:     ", climb
			print "Fix:       ", fi 

			time.sleep(10)
			
	except (KeyboardInterrupt, SystemExit): #when you press ctrl+c
		print "\nKilling Thread..."
		gpsp.running = False
		gpsp.join() # wait for the thread to finish what it's doing
	print "Done.\nExiting."

Hello,

Where did you find the GPS library? I have not been able to find it for importing and usage.

Seth

P.S. I am trying to update your software and the software from the past in your examples to a Python3 version on the BBB family of boards on a Debian Distro.

Hello,

Okay. I figured out what happened. The gps library was another library outside of gpsd when Python2 was not deprecated.

Seth

P.S. If you have any pointers, please do not hesitate to point me towards solutions. I am going to work on this today.

Hello Sir,

I got it to work but not w/ python3 yet. Still trying over here.

Seth

P.S. That software works like a charm w/ my leftover python2 packaging.

Hello,

Anyway...thank you for making this freely available w/ the current sources of those sources. I looked up a couple.

Seth

P.S. Um, I have given up and moved on to GPSD, e.g. from gps3 import gps3 and so on. I did use some of your software to change how I view the data in my .txt file that I would then place in a .kml file. Nice! Thank you, sir.