How to install drivers for Wifi USB Stick and Onboard Camera

Installing and Using OpenWrt
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  1. I have two systems: on two RPI 3B+ sd cards . I am getting errors
Linux OpenWrt 4.14.180 #0 SMP Sat May 16 18:32:20 2020 aarch64 GNU/Linux
Linux OpenWrt 5.4.87 #0 SMP Thu Jan 14 13:06:00 2021 aarch64 GNU/Linux

But No USB Stick for wifi 802.11ac is detected. I cannot do make as per

git clone https://github.com/lwfinger/rtw88.git
cd rtw88
make

make -C /lib/modules/5.4.87/build M=/root/rtw88 modules
make[1]: *** /lib/modules/5.4.87/build: No such file or directory.  Stop.
make: *** [Makefile:79: all] Error 2

I have the following output:

       0bda:b812 Realtek Semiconductor Corp. 
Fri Jan 15 06:51:09 2021 kern.info kernel: [  297.032612] usb 1-1.3: new high-speed USB device number 7 using dwc_otg
Fri Jan 15 06:51:09 2021 kern.info kernel: [  297.163794] usb 1-1.3: New USB device found, idVendor=0bda, idProduct=b812
Fri Jan 15 06:51:09 2021 kern.info kernel: [  297.172381] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Fri Jan 15 06:51:09 2021 kern.info kernel: [  297.181427] usb 1-1.3: Product: 802.11ac NIC
Fri Jan 15 06:51:09 2021 kern.info kernel: [  297.187386] usb 1-1.3: Manufacturer: Realtek
Fri Jan 15 06:51:09 2021 kern.info kernel: [  297.193312] usb 1-1.3: SerialNumber: 123456

No video detected. Camera is installed on RPI 3B+ camera port.

root@OpenWrt:~# v4l2-ctl --list-devices
Cannot open device /dev/video0, exiting.

I am new to OpenWrt. I installed the OS Linux OpenWrt 4.14.180 from source downloaded image. Second Image I build on Debian (Ubuntu 18.04) Desktop.
I really need to get the USB Wifi Working on 802.11AC and the camera working.

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If you downloaded an image, you didn't build it from source, so which one is it?

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It is Linux OpenWrt 4.14.180 #0 SMP Sat May 16 18:32:20 2020 aarch64 GNU/Linu

Both Onboard Camera(Attached with the camera port RPI 3B+) and Wifi USB Stick
0bda:b812 Realtek Semiconductor Corp not working. I am getting same kind of error-build failed.
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For the camera you probably need kmod-video-core and kmod-camera-bcm2835.

The builtin wifi, such as it is, does support 5 GHz and ac.

Though it is technically possible on larger systems like the Pi, C compiling in place on the target really isn't commonly done on OpenWrt. The best 80211ac USB chip for OpenWrt is the MT7612U. It has a driver in mainline Linux which is already ported.

1 Like
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Hello, Thank you for your replies. Heres what I did to solve the camera issue.
1.Download and install: openwrt-19.07.5-brcm2708-bcm2710-rpi-3-ext4-factory
2. After login and update and installation of kmod-video-core and kmod-camera-bcm2835 I was getting the same issue:
ls /dev/video*
ls: /dev/video*: No such file or directory
bcm2835-v4l2: error -1 while loading driver
root@OpenWrt:~# v4l2-ctl --list-devices
Cannot open device /dev/video0, exiting.
2. So, copied these files from Already Installed Raspbian-OS in another PI:
start-x.elf and fixup-x.dat and renamed them as start.elf and fixup.dat resp.
3. in openwrt: cd to boot : backup:
mv fixup.dat fixup.dat_back
mv start.elf start.elf_backup
4. Copied the files start.elf and fixup.dat from Raspbian to OPenwrt
5.Rebbot OPenwrt
6.root@OpenWrt:~# modprobe bcm2835-v4l2
bcm2835-v4l2 is already loaded
root@OpenWrt:~# v4l2-ctl --list-devices
mmal service 16.1 (platform:bcm2835-v4l2):
/dev/video0
7.All the apps for camera are working now
Reference:


I need to work on USB stick now. Thanks

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Hi @mk24 - so does a MT7612U adapter work plug and play? Or anything to install in OpenWRT via opkg?

I am on 21.03

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