To preface, I am a complete newbie to OpenWRT and my technical knowledge is fairly low. I have no broadband/WAN internet at home because there is currently no space in the fibre cabinet so I'm trying to set up a temporary solution using my router and 4G stick. I have a Linksys WRT1900ACS and a Huwawei E3372 4G USB dongle which I can at least get internet on my computer with, but I need a wifi network.
I have managed to install OpenWrt 19.07.7 (r11306-c4a6851c72) onto the 1900ACS and I can access the LuCI web interface by connecting an ethernet cable to my MacBook Pro but I can't install the drivers/packages needed to allow the Linksys to use the E3372 as a WAN interface as there is no internet for the router to access OPKG.
I've searched through the Forums and the Wiki and found a few articles. One option was to download the packages to my MacBook and then install them manually, so I checked for the right version and architecture - according to this https://openwrt.org/toh/hwdata/linksys/linksys_wrt1900acs_v1 it should be arm_cortex-a9_vfpv3 so I then found the right section in the repository here https://downloads.openwrt.org/releases/19.07.7/packages/arm_cortex-a9_vfpv3/packages/ and tried to find the right packages to download.
I've looked at lots of posts and articles (e.g. https://openwrt.org/docs/guide-user/network/wan/wwan/3gdongleand https://gist.github.com/nomonkeynomission/8bdade7383fa58d874bb72cc54f84d2c and they all suggest getting various kmod-usb pakages and usb-modeswitch, but I can't see those in the repository above.
The closest thing I could find was the CCID and modemanager packages, so I downloaded those and uploaded it using LuCI, but then I get an error:
Collected errors: * pkg_hash_fetch_best_installation_candidate: Packages for ccid found, but incompatible with the architectures configured * opkg_install_cmd: Cannot install package ccid.
The opkg install command failed with code
So now I'm at a loss. I can't find the packages in the guides, I can't get OPKG to work on the router without internet and I can't get internet without getting the router to recognise and connect to my 4G dongle!
If it helps, here's the status page from LuCI:
|Model| Linksys WRT1900ACS|
|Architecture| ARMv7 Processor rev 1 (v7l)|
|Firmware Version| OpenWrt 19.07.7 r11306-c4a6851c72 / LuCI openwrt-19.07 branch git-21.044.30835-34e0d65|
Any help would be appreciated