OpenWRT Sierra EM7455 drops connection while driving

[Peter Krause]

Hi Nick,
I did try an /etc/init.d/modemmanager restart, and that didn't bring it back.  It had to be a full reboot of the router.  I haven't tried QMI yet with MM, but mbim is supposed to be more fault tolerant, I thought?
I haven't tried to drop the bearer and rebuild it, but I'm worried about downtime, and if someone is streaming, I'm worried that the connection will be reset every tower and break the stream.

      From: Nick <mips171 at icloud.com>
 To: Peter Krause <peter at uringme.com> 
Cc: ModemManager (development) <modemmanager-devel at lists.freedesktop.org>
 Sent: Tuesday, December 18, 2018 4:53 PM
 Subject: Re: OpenWRT Sierra EM7455 drops connection while driving
   
Hey,

I’m only a little familiar with MM so I don’t know if handover works or not, but FWIW I did do some testing with SIM hot swapping and found that the modem objects created by MM have to be destroyed for the new SIM to be used.  I did this by issuing a stop/start to /etc/init.d/modemmanager.  Maybe you can try that and have some luck?  Have you tried the modem in QMI mode?  AT!USBCOMP=1,1,10D does it on an MC7430

Best,
Nick

   
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