Model : RUT850 101180
Batch : C002
HW : 050S
Serial :
Issue : Firmware upgrade from : RUT850_R_00.01.03.4_WEBUI.bin to RUT850_R_00.01.04_WEBUI.bin
Resultant issues
1) can not downgrade back to RUT850_R_00.01.03.4_WEBUI.bin
2) Loss of communication with LTE/4G modem inside
Required actions : Method to restore the RUT850 to working order
Faults reports
1) Webpage panel for Modem crashes
Web page url : http://192.168.1.1/cgi-bin/luci/;stok=99a26e69c627ba188855ee2f74fcbb5a/admin/network/mobile
/usr/lib/lua/luci/dispatcher.lua:525: Failed to execute function dispatcher target for entry '/admin/network/mobile'.
The called action terminated with an exception:
/usr/lib/lua/luci/dispatcher.lua:525: Failed to execute cbi dispatcher target for entry '/admin/network/mobile/general'.
The called action terminated with an exception:
...b/lua/luci/model/cbi/admin_network/ifaces_mobile.lua:11: attempt to concatenate a nil value
stack traceback:
[C]: in function 'assert'
/usr/lib/lua/luci/dispatcher.lua:525: in function 'dispatch'
/usr/lib/lua/luci/dispatcher.lua:270: in function </usr/lib/lua/luci/dispatcher.lua:269>
2) when logged in via cli no comms possible with modem
> > root@Teltonika-RUT850:~# /etc/init.d/modem stop
> > modem: stopping generic 3G modem...
> > modem: dirty modem reset or shutdown
> > Command failed: Not found
> > modem: removing USB driver
> > modem: done
> > root@Teltonika-RUT850:~# /etc/init.d/modem start
> > modem: starting generic 3G modem
> > modem: inserting USB driver
> > root@Teltonika-RUT850:~# modem: stopping generic 3G modem...
> > modem: dirty modem reset or shutdown
> > Command failed: Not found
> > modem: removing USB driver
> > modem: done
> > modem: starting generic 3G modem
> > modem: inserting USB driver
> > modem: stopping generic 3G modem...
> > modem: dirty modem reset or shutdown
> > Command failed: Not found
> > modem: removing USB driver
> > modem: done
> > modem: starting generic 3G modem
> > modem: inserting USB driver
> > modem: stopping generic 3G modem...
> > modem: dirty modem reset or shutdown
> > Command failed: Not found
> > modem: removing USB driver
> > modem: done
> > modem: starting generic 3G modem
> > modem: inserting USB driver
> > sh: you need to specify whom to kill
> > client_loop: send disconnect: Broken pipe
