Realtek RTL8811GU USB wifi adapter driver for Raspberry OS

References

I synthesize knowledge from the following sources to build driver of RTL8811GU chipset for Raspberry OS:

• https://github.com/McMCCRU/rtl8188gu
• https://github.com/morrownr/8821cu
• https://github.com/brektrou/rtl8821CU

Installation Steps

1. Update the system

   sudo apt update
   

2. Install the required packages

   sudo apt install -y raspberrypi-kernel-headers bc build-essential dkms git
   

3. Clone the source code

   mkdir ~/build
   cd build
   git clone https://github.com/McMCCRU/rtl8188gu
   git clone https://github.com/morrownr/8821cu
   

4. Update the code to build for Raspberry Pi OS

• For 32bit

  cp 8821cu/raspi32.sh rtl8188gu/
  cd rtl8188gu
  ./raspi32.sh
  

• For 64bit

  cp 8821cu/raspi64.sh rtl8188gu/
  cd rtl8188gu
  ./raspi64.sh
  

5. Build driver

   make -j4
   

6. Installing

   sudo make install
   sudo systemctl start bluetooth.service
   

7. If your device is a "multi-state" USB WiFi adapters, try to change USB mode to Wifi adapter

   sudo usb_modeswitch -KW -v 0bda -p 1a2b
   

   Alaways switch USB mode at startup
   • Edit usb_modeswitch rules: sudo nano /lib/udev/rules.d/40-usb_modeswitch.rules
   • Append before the end line LABEL="modeswitch_rules_end" the following:

     # Realtek 8211GU Wifi
     ATTR{idVendor}=="0bda", ATTR{idProduct}=="1a2b", RUN+="/usr/sbin/usb_modeswitch -K -v 0bda -p 1a2b"