A script that allows a user to use the Ericsson F5521gw (HP HS2340) UMTS/GPRS WWAN card with the de facto standard GPS utility on Linux, which is GPSd.

F5521gwGPS.py

#!/usr/bin/env python3

# -Author: Ravjot Singh Samra ([email protected])-
# This script is intended for using the Ericsson F5521gw (HP HS2340) WWAN card
# with GPSd. As of now (d13/m12/2018) it is still unusable with GPSd without
# configuring it first; however, GPSd does not send the Hayes AT command
# in the first place to start up the GPS. The solution is to send the AT
# commands, set the connection used for sending it to "sleep", and then
# use the device normally. This should seriously be done by GPSd instead.

import sys
import serial # sudo pip3 install pyserial

def getline(gps, lines):
	for i in range(lines):
		print(gps.readline().decode("utf-8"))

def main(dev):
	gps = serial.Serial(dev, timeout=5)
	print(gps.name)
	getline(gps, 1)

	gps.write(b"AT*E2GPSCTL=1,5,1\r\n") # Control GPS settings. NMEA on.
	getline(gps, 2)

	gps.write(b"AT*E2GPSNPD\r\n") # Start the GPS.
	getline(gps, 3)

	print("'OK' should be returned twice as a\n"
		"result of sending 2 AT commands.\n")

	input("Press ENTER once you have launched\n"
		"GPSd and your monitoring program\n"
		"with the device specified above,\n"
		"or preferably you can leave this\n"
		"script open until you're done...\n")

	gps.close()

if __name__ == "__main__":
	if len(sys.argv) < 2:
		print("USAGE: python3 thisScript.py "
			"<F5521gw NMEA device under /dev/>\n"
			"The device is usually '/dev/ttyACM2>'")
		sys.exit()

	main(sys.argv[1])