BrosTrend USB wifi dongle, supported ? rtl88x2bu

Installing and Using OpenWrt
1

Hello!

I was searching for a wifi dongle that seems supported by linux. Thus I found the BrosTrend AC1200 usb dongle (model AC3L).

It looks like it should run with the rtl8812au driver, so I installed the kmod-rtl8812au-ct package via opkg.

After inserting the dongle, dmesg shows me the following:

[  443.527071] usb 1-1.3: new high-speed USB device number 5 using dwc_otg
[  443.636240] usb 1-1.3: New USB device found, idVendor=0bda, idProduct=b812, bcdDevice= 2.10
[  443.648980] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  443.658365] usb 1-1.3: Product: 802.11ac NIC
[  443.664087] usb 1-1.3: Manufacturer: Realtek
[  443.669786] usb 1-1.3: SerialNumber: 123456

Doesn't that mean that the dongle is correctly detected? I am running OpenWrt 21.02.

Any hints what needs to be done to get that thing working?

Best regards

Claudio

2

Try to install kmod-rtl8812au-ct, and reconnect the adapter.

What's the use case ?

3

I did install that but I don't see the adapter under Network -> Wireless

Use case: The wifi dongle will be used in client mode, the openwrt router in question will connect itself to an existing wlan.

4

It won't pop up there, automagically.

You have to create a new interface.

5

ah ok. If I do so, via luci web interface, I don't see a new device that I could use to setup the new interface...

or how should I add the new interface?

on another router with anoter wifi dongle I have the settings in /etc/config/wireless

config wifi-device 'radio0'
	option type 'mac80211'
	option channel '11'
	option hwmode '11g'
	option path 'platform/soc/3f980000.usb/usb1/1-1/1-1.4/1-1.4:1.0'

but how could I find out the option path parameter?

6

(19.07 screenshot)

image
?

7

agree for step one, then:

device
device1152×400 16.7 KB

in the Device drop down, I don't have a new device for the wifi dongle...

8

then it's still not detected by the OS, incorrect kmod perhaps.

what does lsusb say about it ?

9

lsusb says:

Bus 001 Device 004: ID 7392:7811
Bus 001 Device 003: ID 0424:ec00  
Bus 001 Device 005: ID 0bda:b812 Realtek 802.11ac NIC
Bus 001 Device 002: ID 0424:9514  
Bus 001 Device 001: ID 1d6b:0002 ...

seems to be there

10

That just shows the device has been enumerated on the USB bus, it doesn't mean there is a driver attached. There should be additional log messages from the driver after the initial enumeration.

11 
rtl88x2bu

(good luck with that)

1 Like
12

I downloaded the driver for debian:

https://deb.trendtechcn.com/rtl8812au-dkms.deb

and it looks like the source code is included. Is there a way to cross compile it for openwrt?

13

this might be useful About rtl8812bu driver (Cannot find on package database) - #24 by _jason

search the forum for rtl88x2bu

if I were you, I'd just return it, and get something MT-based, risk/chance if it working is a lot higher

14

you are absolutely right, I already packed it for return... It's just too much hassle

1 Like
15

good call :slight_smile:

16

I got this from Amazon a while back - https://www.amazon.com/dp/B08F9QPDMC , it's on the github list of devices, posted earlier.

Installed kmod-mt76x2u, which pulled a lot of dependencies, and I was good to go.

No problem setting up an AP, and connecting to it.
Didn't do any deeper tests though, saw it come up, and I was able to connect.

Used openwrt 21.02.1.

17

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