GPSController.py

from gps import *
import time
import threading
import math

class GpsController(threading.Thread):
    def __init__(self):
        threading.Thread.__init__(self)
        self.gpsd = gps(mode=WATCH_ENABLE) #starting the stream of info
        self.running = False
    
    def run(self):
        self.running = True
        while self.running:
            # grab EACH set of gpsd info to clear the buffer
            self.gpsd.next()

    def stopController(self):
        self.running = False
  
    @property
    def fix(self):
        return self.gpsd.fix

    @property
    def utc(self):
        return self.gpsd.utc

    @property
    def satellites(self):
        return self.gpsd.satellites

if __name__ == '__main__':
    # create the controller
    gpsc = GpsController() 
    try:
        # start controller
        gpsc.start()
        while True:
            if ( len(gpsc.satellites) > 0 ):
                print "latitude ", gpsc.fix.latitude
                print "longitude ", gpsc.fix.longitude
                print "time utc ", gpsc.utc, " + ", gpsc.fix.time
                print "altitude (m)", gpsc.fix.altitude
                print "eps ", gpsc.fix.eps
                print "epx ", gpsc.fix.epx
                print "epv ", gpsc.fix.epv
                print "ept ", gpsc.gpsd.fix.ept
                print "speed (m/s) ", gpsc.fix.speed
                print "climb ", gpsc.fix.climb
                print "track ", gpsc.fix.track
                print "mode ", gpsc.fix.mode
                print "sats ", gpsc.satellites
            else:
                print "Looking for satellites"
	    time.sleep(1)

    #Ctrl C
    except KeyboardInterrupt:
        print "User cancelled"
    
    #Error
    except:
        print "Unexpected error:", sys.exc_info()[0]
        raise

    finally:
        print "Stopping gps controller"
        gpsc.stopController()
        #wait for the tread to finish
        gpsc.join()
      
    print "Done"