Re: Some experiments with the SIMCOM SIM5216E modem on a ARM926 board

[Jean-Christian de Rivaz <jc@eclis.ch>]

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Hi Marcel,

> So lets figure out which one is the NMEA port and which one is the
> QCDM/DIAG port. Use gatchat/test-qcdm --device<tty>  and see which one
> responds. That one is the QCDM port and the other is the NMEA port.

As expected, now that we known the mapping:

$ test-qcdm --device /dev/ttyUSB0
Device: /dev/ttyUSB0
==> Version information
Compiled Date: Nov 25 2010
Compiled Time: 10:41:31
Release Date: Jun 21 2010
Release Time: 01:00:00
Model: KPUBL
MSM version: 1
==> Features response
==> Invalid command response

Others interfaces don't response, as expected.

By the way, I just discover this test-qcdm utility. SIMCOM is currently 
evaluating the possibility to provide to me some additional hardware to 
investigate the AT+CLCC issue as there can't reproduce it on there side. 
As far as understand, this would consist precisely in a software 
connected to the diagnostic port. Did you think that test-qcdm is good 
enough for the task ?

> I bet that interface #4 is actually some form of CDC Ethernet for
> highspeed data transfers. So that you do not have to use PPP. Might
> wanna ask SIM COM about it.

Yes, would be great. I will ask them on that.

Regards,

Jean-Christian