QUECTEL EC20/EC21. Several drivers supported, which one is better to use?

[José]

Hi Thomas,

thanks for the advice! The EC20 is workign fine. For the EC21, I get
the following error:

'QMI operation failed: Cannot send message: QMI service 'dms' version
'1.1' required, got version '1.0''

I suspect that can be fixed but just upgrading ModemManager or libqmi
(or maybe both). Is that correct?

On Tue, Sep 6, 2016 at 9:51 PM, Thomas Schäfer <tschaefer at t-online.de> wrote:
> Am Dienstag, 6. September 2016, 17:57:45 schrieb José:
>> Hi,
>>
>> I am planning to test ModemManager with QUECTEL EC20 and EC21 cellular
>> modems. These modems support the following drivers:
>> * USB Serial (option.c)
>> * CDC ACM
>> * GobiNet
>> * QMI WWAN
>>
>> What is the best approach for trying to use ModemManager?
>
> QMI WWAN, option.c
>
>
>> Should I
>> enable all drivers?
>
> No.
>
>
>>
>> Could you recommend which one of those to enable? Thanks
>
> https://sigquit.wordpress.com/2014/06/11/qmiwwan-or-gobinet/
>
>
>
> I think this blog is still valid.
>
>
> Thomas