gps_final.py

import serial              
from time import sleep
import sys
import webbrowser

ser = serial.Serial ("/dev/ttyS0")
gpgga_info = "$GPGGA,"
GPGGA_buffer = 0
NMEA_buff = 0

def convert_to_degrees(raw_value):
    decimal_value = raw_value/100.00
    degrees = int(decimal_value)
    mm_mmmm = (decimal_value-int(decimal_value))/0.6
    position = degrees + mm_mmmm
    position = "%.4f" %(position)
    return position

try:
    while True:
        received_data = (str)(ser.readline()) #read NMEA string received
        GPGGA_data_available = received_data.find(gpgga_info)   #check for NMEA GPGGA string                
        if (GPGGA_data_available>0):
            GPGGA_buffer = received_data.split("$GPGGA,",1)[1]  #store data coming after “$GPGGA,” string
            NMEA_buff = (GPGGA_buffer.split(','))
            nmea_time = []
            nmea_latitude = []
            nmea_longitude = []
            nmea_time = NMEA_buff[0]                    #extract time from GPGGA string
            nmea_latitude = NMEA_buff[1]                #extract latitude from GPGGA string
            nmea_longitude = NMEA_buff[3]               #extract longitude from GPGGA string
            print("NMEA Time: ", nmea_time,'\n')
            lat = (float)(nmea_latitude)
            lat = convert_to_degrees(lat)
            longi = (float)(nmea_longitude)
            longi = convert_to_degrees(longi)
            print ("NMEA Latitude:", lat,"NMEA Longitude:", '-'+longi,'\n')
            #map_link='http://maps.google.com/?q='+lat+','+longi
            #webbrowser.open(map_link)

except KeyboardInterrupt:
    sys.exit(0)