MR200v4/atc/fib-fm350_gl

Fibocom FM350-GL modem

Package dependencies:

kmod-usb-serial-option
kmod-usb-net-rndis
comgt

To be used with luci-proto-atc

USB hotplug script add Option driver. You can edit /etc/hotplug.d/usb/50-fm350_driver to use Generic driver.

AT command base script. Handles network disconnections if your service provider use NITZ. The FM350-GL modem has a limitied support for AT command and the only trigger for reconnection is the indication of received NITZ information, +CTZV.
Support dual stack and received SMS will be stored in /tmp/sms/rx folder and the full path is sent to /usr/bin/atc_rx_sms.sh <full path>. atc_rx_sms.sh is not included in the package.

Download and install with:

wget https://github.com/mrhaav/openwrt/raw/master/atc/fib-fm350_gl/atc-fib-fm350_gl_2024-04-26-0.2_all.ipk
opkg install atc-fib-fm350_gl_2024-04-26-0.2_all.ipk

In AT+GTUSBMODE=40 (0e8d:7126) then the AT-command port is USB interface 4 and in AT+GTUSBMODE=41 (0e8d:7127) the AT-command port is USB interface 6. If you don´t have any other seial USB interfaces connected it will be /dev/ttyUSB2 and /dev/ttyUSB4.

If the script doesn´t work, check in syslog. If it stops at offline -> registered - ..... then your service provider doesn´t use NITZ and disconnections can´t be detected. You can use atc-fib-fm350_gl_2024-04-24-0.2_all.ipk instead, but you have to check network connectivity by your self.

If you have problems with modem crashes this hotplug script may help to re-start the interface.

/etc/hotplug.d/usb/60-fm350_crash

if ([ "$PRODUCT" = 'e8d/7126/1' ] || [ "$PRODUCT" = 'e8d/7127/1' ]) && [ "${DEVICENAME: -3}" = '1.6' ] && [ "$ACTION" = 'bind' ] && [ -f /tmp/fm350.status ] && [ $(cat /tmp/fm350.status) != 'boot' ]
then
    logger -t fm350-gl 'Modem has crashed'
    echo $((1+$(cat /tmp/fm350.status))) > /tmp/fm350.status
    wanIface=$(uci show network | grep "proto='atc'" | awk -F '.' '{print $2}')
    ifup $wanIface
fi

Source code at: https://github.com/mrhaav/openwrt-packages/tree/main/atc-fib-fm350_gl