[Ovmsdev] Simcom 7000G

Mark Webb-Johnson mark at webb-johnson.net
Sun Jul 4 17:19:55 HKT 2021


I have a SIM7000E on my desk, but haven’t played around with it much. I think the SIM7600 is more suitable for what we need (and closest to the SIM5360 it replaces).

I don’t think the CMUXPORT commands work on that module, and not sure if it even has a CMUX. The manual does mention it in one place, but not sure. It mentions compatibility with the SIM800, which does have CMUX.

What version of firmware are you running on the SIM7000?

Regards, Mark.

> On 4 Jul 2021, at 3:46 PM, Derek Caudwell <d.caudwell at gmail.com> wrote:
> Hi all, 
> I've been using Realterm to look at the 7000G's capabilities, and although the documentation only makes indirect reference to supporting uart multiplex mode, it does accept the AT+CMUX=0 command and reports back configuration values when queried with AT+CMUX? Unfortunately that appears to be where its support ends, the device responds with OK to the CMUX command however there is no response to the SABM command to open the control channel. I am sending the following hex in Realterm $F9 $03 $3F $01 $1C $F9.
> Is there anything else worth trying? or that I'm missing in setting up the CMUX?
> Cheers
> Derek
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