Actually, the NMEA stream never starts automatically. Instead, I get this new file in /tmp/ttyGSM0 with the start instruction which never ran.
That’s caused by the instruction
sleep 10
echo -e “AT+UGPS=1,4,67\r\n” > /tmp/ttyGSM0
which I assume is incorrect (I suspect it could be /dev/ttyGSM0 instead of /tmp/ttyGSM0 like in the instruction for direct commands)
