Unable to recognize device USBS

For Developers
1

I'm creating a custom build for my ZBT WE826, but in /dev it won't appear the USBSX, I've tried reading some guides from the OpenWRT wiki and other sites about a possible missing usb module, I've installed all the packages in those guides for usb, but still no luck. I need it to be recognized so I can use a SIM card with my ZBT for 4G. Anyone have an idea of a package I might be missing?
Some of the packages I've tried:
usb-modeswitch, kmod-mii, kmod-usb-net, kmod-usb-wdm, kmod-usb-net-qmi-wwan, uqmi

and the ones from this guide:
https://wiki.openwrt.org/doc/recipes/3gdongle

Thanks

2

Did you see it when pluging it and running dmesg?

try searching for "ZBT WE-826 openwrt" too. I think that the chipset is mt7620.

3

kmod-usb-storage kmod-usb-storage-extras have you tried either of those?and the file format kmod-fs-ext4 kmod-fs-ext3 etc...or is this just some kind of wifi or bluetooth usb?

4

Its a ZBT WE826

I have compiled the system from scratch, selecting all modules and packages one by one, but my modem won't recognize in /dev my SIM card, for what I know it's detected as ttyUSB0 or 1, but it doesn't show up at the /dev. I've tried the approach from this tutorial:

but no luck, I've tried all the usb modules to compile but also no luck, I'll tryout the packages you listed and see if anything is missing, thx

5

Yep its exactly that chipset, but im compiling the kernel from scratch and now I'm looking for any usb module/package that i might have missed, I need my ZBT to recognize the SIM card but it only shows in /dev the cdc-wdm0 device and the serial device ttyS0 and ttyS1, tomorrow I'll post the output of my dmesg | grep USB command.

6

Why you need to recompile all, it is easier to build your own image with precompiled packages instead.

7

That's exactly what I'm doing, from scratch I mean, using the source code with zero packages selected and choosing one by one, because I need to save the maximum amount of space that I can

8

just remove the common ones for ipv6, luci, etc...

In OpenWRT I used:

opkg list-installed | awk '{print $1}' | sed ':M;N;$!bM;s#\n# #g'

to get a list of packages in that way you could see which ones you can remove

Sample for extroot I used on OpenWRT:

make image PROFILE=XXXXXXXX FILES=files/ PACKAGES="kmod-usb-storage block-mount kmod-fs-ext4 -dnsmasq -firewall -kmod-crypto-aes -kmod-crypto-arc4 -kmod-crypto-core -kmod-ipv6 -libiwinfo-lua -liblua -libubus-lua -libuci-lua -lua -luci -luci-app-firewall -luci-base -luci-lib-ip -luci-lib-nixio -luci-mod-admin-full -luci-proto-ipv6 -luci-proto-ppp -luci-theme-bootstrap -rpcd -uhttpd -uhttpd-mod-ubus"

This are my notes about: https://gist.github.com/braian87b/4a9048dcc2e2fd244f7d44b8896b7ccc

9

@Baratao00 Post your dmesg output.

10

So surprisingly my 4g internet worked through the SIM card, I don't understand very well yet, but now the device node I need to focus on it's the cdc-wdmX and not the ttyUSBX anymore, everything seens ok, thanks for your attention and sorry for my noobish doubts xD