I'm new to the forum and please forgive for my non mother-tongue english (I'm writing from Italy)...
I'm trying to setup a Unielec U7621 board with an LTE module, and asking your suggestions for a problem I have using latest snapshot build (both downloaded and/or compiled by myself). I'm using latest snapshot because I need the latest patches for the LTE module below.
Everything is working out-of-the box (following instructions found on: https://openwrt.org/docs/guide-user/network/wan/wwan/3gdongle) if I put in an Huawei ME909u-521 mPCI module temporary removed from a laptop.
The ME909 is obsolete (and expensive), so I've acquired a SIMCOM SIM7600E-H module, and installed on the board following the documentation page:
https://openwrt.org/docs/guide-user/network/wan/wwan/ltedongle for setting up a QMI interface.
The SIM7600 was very promising: GPS, LTE, cheap, but...
The module is recognized by lsusb, and the proper interfaces are shown in /dev (including /dev/cdc-wdm0).
I'm able to correctly send AT commands via minicom on /dev/ttyUSB2 interface.
By means of luci I did the configuration, creating a new MWAN interface, but was unable to let the LTE connection run.
In detail, the uqmi command seems to be "stucked" in either automatic and manual invocation (after killing all the pending processes).
When from the console I try to send uqmi commands (e.g. uqmi -d /dev/cdc-wdm0 --get-data-status) the command hangs-up until I hit ^C, with no useful results (always ""Failed to connect to service").
I've tried to search for information but, apart from the qmi_wwan.c patches (alredy incorporated in the latest snapshot build) I found very little useful.
Is there someone able to correctly configure this SIMCOM 7600E-H module? Can you give me hints to point in the right direction?
Thanks in advance for your support,