Mifi: can't force LTE?

jadurrance · 2017-09-03T09:25:22.000Z

Running EC-20 on UK’s 3 through a VPN on v2.261, if any of that matters.

root@GL-MIFI:~# echo -e “AT+QCFG="nwscanmode",3,1” > /dev/ttyUSB2

ash: write error: Resource temporarily unavailable

Any thoughts?

tangxiusi · 2017-09-04T16:30:00.000Z

because the /dev/ttyUSB2 is used for communication, so you need to wrtie it in /dev/ttyUSB3

echo -e “AT+QCFG=\”nwscanmode\”,3,1″ > /dev/ttyUSB3

jadurrance · 2017-09-04T16:33:19.000Z

Hmm, I didn’t pull that out of thin air, that’s directly from the MiFi startup doc. I’ll try your way and report back.

alzhao · 2017-09-04T16:40:12.000Z

The module can use ttyUSB2 or ttyUSB3 for data and another one for control.

So if you use ttyUSB2 for data, then you need to use ttyUSB3 send send AT command.