Hi,
This solved my issues with compiling the gps module, thank you for your help.
sudo apt-get install raspberrypi-kernel-headers
However, I now have a problem when I run gsmMuxd:
pi@raspberrypi:~ $ sudo modprobe n_gsm
pi@raspberrypi:~ $ gsmMuxd
/tmp/ttyGSM0 Command Channel
/tmp/ttyGSM1 Command Channel
/tmp/ttyGSM2 GNSS Tunneling
MUX startup failed. See syslog for details.
When I look at the logs, I see:
pi@raspberrypi:~ $ journalctl -e
Aug 04 10:56:55 raspberrypi sudo[14726]: pam_unix(sudo:session): session closed for user root
Aug 04 10:56:57 raspberrypi sudo[15450]: pi: TTY=pts/2 ; PWD=/home/pi; USER=root ; COMMAND=/usr/sbin/modprobe n>
Aug 04 10:56:58 raspberrypi kernel: n_gsm: loading out-of-tree module taints kernel.
Aug 04 10:57:03 raspberrypi gsmMuxd[15458]: Port -1 : gsmMuxd
Aug 04 10:57:03 raspberrypi gsmMuxd[15458]: Port 0 : (null)
Aug 04 10:57:03 raspberrypi gsmMuxd[15458]: Port 1 : SHELL=/bin/bash
Aug 04 10:57:03 raspberrypi gsmMuxd[15458]: Malloc buffers…
Aug 04 10:57:03 raspberrypi gsmMuxd[15458]: Open devices…
Aug 04 10:57:03 raspberrypi gsmMuxd[15458]: Can’t create symbolic link /tmp/ttyGSM0 -> /dev/pts/3. File exists (17).
Aug 04 10:57:03 raspberrypi gsmMuxd[15458]: Can’t create symbolic link /tmp/ttyGSM1 -> /dev/pts/4. File exists (17).
Aug 04 10:57:03 raspberrypi gsmMuxd[15458]: Can’t create symbolic link /tmp/ttyGSM2 -> /dev/pts/5. File exists (17).
Aug 04 10:57:03 raspberrypi gsmMuxd[15458]: Open serial port…
Aug 04 10:57:04 raspberrypi gsmMuxd[15458]: Opened serial port. Switching to mux-mode.
Aug 04 10:57:06 raspberrypi gsmMuxd[15458]: Modem does not respond to AT commands, trying close MUX mode
Aug 04 10:57:10 raspberrypi gsmMuxd[15458]: MUX mode doesn’t function.