Librem 5 BroadMobi modem reports wrong (?) manufacturer/model info -- bug in firmware? Where to find documentation for the modem?

Hardware Librem 5
12

It’s not all bad, there are some things that do work on both. I tried a bunch of AT commands found here https://wiki.pine64.org/images/2/2e/Quectel_EC25EC21_AT_Commands_Manual_V1.2.pdf and found that the following seem to work in the same way on Librem 5 and PinePhone:

purism@librem5:~$ sudo mmcli -m any --command="AT+GMI"
response: 'BroadMobi'
purism@librem5:~$ sudo mmcli -m any --command="AT+GMM"
response: 'BM818-E1'
purism@librem5:~$ sudo mmcli -m any --command="AT+GMR"
response: 'M1.0.0_E1.0.0.0_A1.0.0'

mobian@pinephone:~$ sudo mmcli -m any --command="AT+GMI"
response: 'Quectel'
mobian@pinephone:~$ sudo mmcli -m any --command="AT+GMM"
response: 'EG25'
mobian@pinephone:~$ sudo mmcli -m any --command="AT+GMR"
response: 'EG25GGBR07A08M2G'

AT+CPAS – Mobile Equipment Activity Status: gives 0 when idle and 4 when a call is ongoing

AT+GSN – Request International Mobile Equipment Identity (IMEI)

AT+CIMI – Request International Mobile Subscriber Identity (IMSI)

AT+CPIN? – check if PIN code has been entered OK, says “READY” if so

AT+COPS? – check current mode and currently selected operator:

purism@librem5:~$ sudo mmcli -m any --command="AT+COPS?"
response: '+COPS: 0,0,"Tele2",7'

mobian@pinephone:~$ sudo mmcli -m any --command="AT+COPS?"
response: '+COPS: 0,0,"Tele2 Comviq",7'

AT+CSQ – Signal Quality Report

AT+CLCC – List Current Calls of ME

AT+CMGF – check or set SMS Message Format, text mode or PDU mode

AT+CSCA? – Service Center Address

AT+CMGL=4 – list all SMS messages (to see them this way, chatty needs to be stopped because otherwise chatty will take care of the SMS messages and delete them from the modem)

AT+CGATT – Attachment or Detachment of PS

AT+CGDCONT? – Define PDP Context

purism@librem5:~$ sudo mmcli -m any --command="AT+CGDCONT?"
response: '+CGDCONT: 1,"IPV4V6","","0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0",0,0,0,0
+CGDCONT: 2,"IPV4V6","data.tre.se","0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0",0,0,0,0
+CGDCONT: 3,"IPV4V6","4g.tele2.se","0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0",0,0,0,0'

mobian@pinephone:~$ sudo mmcli -m any --command="AT+CGDCONT?"
response: '+CGDCONT: 1,"IP","wholesale","0.0.0.0",0,0,0,0
+CGDCONT: 2,"IPV4V6","ims","0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0",0,0,0,0
+CGDCONT: 3,"IPV4V6","","0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0",0,0,0,1'

AT+CGPADDR – Show PDP Address

AT+CCLK? – queries the real time clock (RTC) of the module

purism@librem5:~$ sudo mmcli -m any --command="AT+CCLK?"
response: '+CCLK: "21/02/07,00:57:47+04"'

mobian@pinephone:~$ sudo mmcli -m any --command="AT+CCLK?"
response: '+CCLK: "21/02/07,00:57:48+04"'

No idea why the timezone is “+04” but that’s what it says, on both of them.

Anyway my point was to show that there are quite a lot of commands that actually do work on both. (But far from all of them, my impression is that if you take some random AT command that works on the PinePhone then there is less than a 50/50 chance that it will work on the Librem 5.)

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