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abeyt/AC650M_RTL8821CU_WiFi.txt

Created January 27, 2021 12:56
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  1. abeyt created this gist Jan 27, 2021.
    67 changes: 67 additions & 0 deletions AC650M_RTL8821CU_WiFi.txt
    View file
    Original file line number Diff line number Diff line change
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    #http://124.244.86.40:8080/wordpress/2020/12/13/%E5%9C%A8-raspberry-pi-%E5%AE%89%E8%A3%9D-mercury-usb-wifi-ac650m-%E9%A9%85%E5%8B%95/ (jan2021)
    mkdir -p ~/build
    cd ~/build
    git clone https://github.com/brektrou/rtl8821CU.git

    sudo apt-get install dkms bc vim -y

    sudo apt update -y
    sudo apt upgrade --fix-missing -y && reboot

    cd ~/build/rtl8821CU


    sudo vim Makefile
    CONFIG_PLATFORM_I386_PC = y
    CONFIG_PLATFORM_ARM_RPI = n

    Change to

    CONFIG_PLATFORM_I386_PC = n
    CONFIG_PLATFORM_ARM_RPI = y


    sudo cp -v /lib/modules/$(uname -r)/build/arch/arm/Makefile /lib/modules/$(uname -r)/build/arch/arm/Makefile.$(date +%Y%m%d%H%M)
    sudo sed -i 's/-msoft-float//' /lib/modules/$(uname -r)/build/arch/arm/Makefile
    sudo ln -s /lib/modules/$(uname -r)/build/arch/arm /lib/modules/$(uname -r)/build/arch/armv7l

    sudo ./dkms-install.sh
    sudo usb_modeswitch -KW -v 0bda -p 1a2b
    systemctl start bluetooth.service

    sudo vim /lib/udev/rules.d/40-usb_modeswitch.rules

    Before the following line:

    LABEL="modeswitch_rules_end"

    Insert the following settings

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

    #
    #iw dev
    phy#1
    Interface wlan1
    ifindex 4
    wdev 0x100000001
    addr 54:c9...

    Bus 001 Device 008: ID 0bda:c820 Realtek Semiconductor Corp.
    Device Descriptor:
    bLength 18
    bDescriptorType 1
    bcdUSB 2.00
    bDeviceClass 239 Miscellaneous Device
    bDeviceSubClass 2
    bDeviceProtocol 1 Interface Association
    bMaxPacketSize0 64
    idVendor 0x0bda Realtek Semiconductor Corp.
    idProduct 0xc820
    bcdDevice 2.00
    iManufacturer 1 Realtek
    iProduct 2 802.11ac NIC
    iSerial 3 123456