[Ublox]: UBlox L-210 will not work using ACM interface

[Engel, Mike]

Hi Aleksander,

No this is with our own hardware but other modems work fine. The UBlox modem only works when I use the USBNET driver instead of the serial port. 

Anyway many thanks for your help. If I get some more information I will try to update the thread. 

Best regards,
--
Mike Engel

-----Original Message-----
From: Aleksander Morgado [mailto:aleksander at aleksander.es] 
Sent: Tuesday, March 21, 2017 10:09
To: Engel, Mike
Cc: modemmanager-devel at lists.freedesktop.org
Subject: Re: [Ublox]: UBlox L-210 will not work using ACM interface

On Mon, Mar 20, 2017 at 4:46 PM, Engel, Mike <Mike.Engel at digi.com> wrote:
> I have used the MM 1.7.0 that includes the UBlox plugin and the error that I saw with the previous version persist. It seems that the SIM is not detected.
>
> When I change the USB profile from (3 ("NETWORK, 1 
> CDC-ACM"),("RNDIS"),()) default. When I change that to (2 ("NETWORK, 3 
> CDC-ACM"),("ECM"),()) with the command
> At+uusbconf=2
>
> The modem will be detected as ETHX and I can use it correctly using the same SIM card.
>
> Could it be that the profile 3 only has one AT port ttyACM0 and the ModemManager might require more than one serial port?

Nope, no, it has nothing to do with that. The modem is actually telling us that there is no SIM detected when we ask, we don't do much
more:

ModemManager[832]: <debug> [1490023896.705621] [../../git/src/mm-port-serial-at.c:459] debug_log(): (ttyACM0): --> 'AT+CP IN?<CR>'
ModemManager[832]: <debug> [1490023896.726605] [../../git/src/mm-port-serial-at.c:459] debug_log(): (ttyACM0): <-- '<CR><
LF>+CME ERROR: 10<CR><LF>'
ModemManager[832]: <debug> [1490023896.727072] [../../git/src/mm-serial-parsers.c:364] mm_serial_parser_v1_parse():
Got f
ailure code 10: SIM not inserted

I have tested the plugin in both those modes in the past with the L210 I have and never experienced that thing, so no idea... Are you using the u-blox devkit for testing?

--
Aleksander
https://aleksander.es