Sorry for taking so long to get back to you. We know have a fix and we would love to have your feedback.
1.make sure the kernel module n_gsm is running
sudo modprobe n_gsm
2. pull down the new mux software, enter into the directory and make
git clone https://github.com/ozzmaker/gsmmux cd gsmmux make
You may get some warnings, you can ignore these.
3. Run gsmMuxd, you should see output similar to below
pi@raspberrypi:~/gsmmux $ ./gsmMuxd /tmp/ttyGSM0 Command Channel /tmp/ttyGSM1 Command Channel /tmp/ttyGSM2 GNSS Tunneling MUX started
4.stop and then disable gpsd
sudo systemctl stop gpsd.socket sudo systemctl disable gpsd.socket
5. Start gpsd from the command prompt, point to the GNSS tunneling interface
/usr/sbin/gpsd -n /tmp/ttyGSM2
6.connect to command channel
minicom 115200 -D /tmp/ttyGSM1
8. View GPS data
Richard --OzzMaker.com --