Setting up a Quectel RM520GL-N on a Banana Pi R4-Pro

[Philip Prindeville]

Hi,

I brought up the default image burned into my BPi-R4 Pro (which seems to be missing a bunch of modules to support modemmanager, as well as modemmanager itself).  I installed these per:

https://openwrt.org/docs/guide-user/network/wan/wwan/modemmanager

But can't figure out how to populate the new 'interface' section in /etc/config/network per the instructions.  Like the 'device' specifically.  Or 'lowpower'.

Also that page doesn't mention anything about ECM modems.

I'm using T-Mobile 5G Home Internet in the US.

root at OpenWrt:~# lsusb
Bus 001 Device 001: ID 1d6b:0002 Linux 6.6.93 xhci-hcd xHCI Host Controller
Bus 001 Device 002: ID 1a86:8091  USB HUB
Bus 002 Device 001: ID 1d6b:0003 Linux 6.6.93 xhci-hcd xHCI Host Controller
Bus 003 Device 001: ID 1d6b:0002 Linux 6.6.93 xhci-hcd xHCI Host Controller
Bus 003 Device 002: ID 2109:2822 VIA Labs, Inc.          USB2.0 Hub             
Bus 004 Device 001: ID 1d6b:0003 Linux 6.6.93 xhci-hcd xHCI Host Controller
Bus 004 Device 002: ID 2109:0822 VIA Labs, Inc.          USB3.1 Hub             
Bus 004 Device 003: ID 2c7c:0801 Quectel RM520N-GL
root at OpenWrt:~# lspci
root at OpenWrt:~# 

Some of the documentation says to use the ECM mode drivers, as well.

Any help appreciated.  My current network connection is going away in a few days and I need to get this working.

Thanks