Help me complete this python GPS code for sending SMS with googlemaps data

[YitEarp]

I could use some info for how to get out of the break statement and continue. I am super new to python and i ripped and tweaked this code as best i could from various sources and i am still putting in the work to learn. Just need to figure a way to append the location data to googlemaps and then send it in an SMS to the number.

Sometimes the GPS signal will not be ready so i end up with gibberish i have tried to put a time wait to let it catch a signal first. Sometimes it works sometimes not i tried an if statement for str.find ("location not fix") but then i couldn't get my head around what to do after it prints that message.

Thanks!

Code: Select all

#!/usr/bin/python

import serial, time, pynmea2


#Enable Serial Communication
ser = serial.Serial("/dev/ttyS0", baudrate=9600, timeout=1)
#Transmitting AT Commands to the Modem
#\r indicates the Enter key

ser.write('AT'+'\r') #Check to see if modem is responding
str = ser.readline()
print str
time.sleep(.1)

ser.write('AT+CGNSPWR=1'+'\r') #Turns on the GPS power
str = ser.readline()
print str
time.sleep(.1)

ser.write('AT+CGPSSTATUS?'+'\r')
str = ser.readline()
print str
time.sleep(.1)

if str.find ("Location Not Fix") > 1:
    print ("Waiting For Fix....")

    ser.flushInput()
    ser.flushOutput()
    time.sleep(15)

ser.write('AT+CGPSOUT=0'+'\r') #Outputs raw NMEA data
str = ser.readline()
print str
time.sleep(3)

ser.write('AT+CGNSTST=1'+'\r') #Starts sending data to UART
str = ser.readline()
print str
time.sleep(5)

#Parsing Raw NMEA data through pynmea2

ser.flushInput()
ser.flushOutput()
def parseGPS(str):
    if str.find("GGA") > 0:
        data = pynmea2.parse(str)
        print "Timestamp: %s -- Lat: %s %s -- Lon: %s %s " % (data.timestamp, data.latitude, data.lat_dir, data.longitude, data.lon_dir)


while True:
    str = ser.readline()
    parseGPS(str)

    break




ser.write('AT+CGPSPWR=0''\r')
ser.readline()
print str

ser = serial.Serial("/dev/ttyS0", baudrate=115200, timeout=1)

ser.readline()
print str
time.sleep(.1)

ser.write('AT+CMGF=1'+'\r')
ser.readline()
print str
time.sleep(5)

ser.write('AT+CMGS="xxxxxxxxxxx":"https://googlemaps.com=loc'+'\^Z')  # This means nothing for now till i figure out how to send map data
ser.readline()
print str
time.sleep(.1)

[pcmanbob]

If you change your if to a while then that part of the code will loop until the output is less than one, then it will execute the rest of your program.

Code: Select all

ser.write('AT+CGPSSTATUS?'+'\r')
str = ser.readline()
print str
time.sleep(.1)

while str.find ("Location Not Fix") > 1:
    print ("Waiting For Fix....")
    
    ser.flushInput()
    ser.flushOutput()
    time.sleep(15)

ser.write('AT+CGPSOUT=0'+'\r') #Outputs raw NMEA data
str = ser.readline()
print str
time.sleep(3)

[YitEarp]

If you change your if to a while then that part of the code will loop until the output is less than one, then it will execute the rest of your program.

Thanks i tried that but it still carries on when there is no GPS data to read from "Location Not Fix" i'll keep going with these python courses and see what i can learn as just a week is probably not enough time

[pcmanbob]

Have you tried adding a print statement in the lines after the while line, to actually print out the variable so you can see what's happening with the variable you are testing.

[Andyroo]

Try this as your while loop:

Code: Select all

while str.find ("Location Not Fix") > 1:
    print ('Waiting for a fix - ',str)
    ser.flushInput()
    ser.flushOutput()
    time.sleep(15)
    str = ser.readline()

I think you need to be repeatedly reading the serial port in the while loop.

[YitEarp]

This is my code at the moment its a little bit messy whilst i am still a "Beginner" with python i am only just learning the basics this is just hashed together i found on the internet

What i would really like to do is parse the data and append it to googlemaps then send an SMS i've seen the code for it but its written for arduino so i need to learn what is the equal in python.

But for the most part this gets an accurate fix of location.

Code: Select all

#!/usr/bin/python

import serial, time, pynmea2


#Enable Serial Communication
ser = serial.Serial("/dev/ttyS0", baudrate=9600, timeout=1)
#Transmitting AT Commands to the Modem
#\r indicates the Enter key

ser.flushOutput()
ser.flushInput()

ser.write('ATE'+'\r') #Check to see if modem is responding
str = ser.readline()
print str
time.sleep(5)


ser.write('AT+CGPSOUT=32'+'\r') #Outputs raw NMEA data
str = ser.readline()
print str
time.sleep(3)


ser.write('AT+CGNSPWR=1,AT+CGPSSTATUS=?'+'\r') #Turns on the GPS power

while str.find ("Location Not Fix") > 1:
    print ('Waiting for a fix - ',str)
    ser.flushInput()
    ser.flushOutput()
    time.sleep(15)
    str = ser.readline(100)



ser.write('AT+CGNSTST=1'+'\r') #Starts sending data to UART
str = ser.readline()
print str
time.sleep(5)


#Parsing Raw NMEA data through pynmea2

ser.flushInput()
ser.flushOutput()
def parseGPS(str):
    if str.find("GGA") > 0:
        data = pynmea2.parse(str)
        print "Timestamp: %s -- Lat: %s %s -- Lon: %s %s " % (data.timestamp, data.latitude, data.lat_dir, data.longitude, data.lon_dir)


while True:
    str = ser.readline()
    parseGPS(str)

[irishgeoff]

import requests
requests.post('https://textita.com/text', {
'phone': '9087938341',
'message': 'Sample SMS Text',
'key': 'textita',
})