https://blog.csdn.net/daxus/article/details/84348308
https://github.com/whitebatman2/rtl8821CU
I test this in Ubuntu 18.04.1 LTS (Linux 4.15.0-39-generic). The usb wifi adapter is TL-WDN5200H.
Drivers for rtl8811CU and rtl8821CU Wi-Fi chipsets. This repository is based on soruce code found on a CD shipped with a rtl8811CU based card. It's updated to build on newer kernel versions.
DKMS is a system which will automatically recompile and install a kernel module when a new kernel gets installed or updated. To make use of DKMS, install the dkms package, which on Debian (based) systems is done like this:
apt-get install dkms
To make use of the DKMS feature with this project, do the following:
DRV_NAME=rtl8821CU
DRV_VERSION=5.2.5.3
sudo mkdir /usr/src/${DRV_NAME}-${DRV_VERSION}
git archive master | sudo tar -x -C /usr/src/${DRV_NAME}-${DRV_VERSION}
sudo dkms add -m ${DRV_NAME} -v ${DRV_VERSION}
sudo dkms build -m ${DRV_NAME} -v ${DRV_VERSION}
sudo dkms install -m ${DRV_NAME} -v ${DRV_VERSION}
If you later on want to remove it again, do the following:
DRV_NAME=rtl8821CU
DRV_VERSION=5.2.5.3
sudo dkms remove ${DRV_NAME}/${DRV_VERSION} --all
Use following commands in source directory:
make
sudo make install
sudo modprobe 8821cu
To build this driver on Raspberry Pi you need to set correct platform in Makefile. Change
CONFIG_PLATFORM_I386_PC = y
CONFIG_PLATFORM_ARM_RPI = n
CONFIG_PLATFORM_ARM_RPI3 = n
to
CONFIG_PLATFORM_I386_PC = n
CONFIG_PLATFORM_ARM_RPI = y
CONFIG_PLATFORM_ARM_RPI3 = n
For the Raspberry Pi 3 you need to change it to
CONFIG_PLATFORM_I386_PC = n
CONFIG_PLATFORM_ARM_RPI = n
CONFIG_PLATFORM_ARM_RPI3 = y
**NOTE: If the kernel is updated, you should operate make clean firstly.
lsusb
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 0b05:1872 ASUSTek Computer, Inc.
Bus 001 Device 003: ID 046d:c534 Logitech, Inc. Unifying Receiver
Bus 001 Device 006: ID 0bda:1a2b Realtek Semiconductor Corp.
Bus 001 Device 005: ID 24ae:4025
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hu
sudo usb_modeswitch -KW -v 0bda -p 1a2b
Take all parameters from the command line
* usb_modeswitch: handle USB devices with multiple modes
* Version 2.5.2 (C) Josua Dietze 2017
* Based on libusb1/libusbx
! PLEASE REPORT NEW CONFIGURATIONS !
DefaultVendor= 0x0bda
DefaultProduct= 0x1a2b
StandardEject=1
Look for default devices ...
found USB ID 1d6b:0003
found USB ID 1d6b:0002
found USB ID 1d6b:0003
found USB ID 0b05:1872
found USB ID 046d:c534
found USB ID 0bda:1a2b
vendor ID matched
product ID matched
found USB ID 24ae:4025
found USB ID 1d6b:0002
Found devices in default mode (1)
Access device 006 on bus 001
Get the current device configuration ...
Current configuration number is 1
Use interface number 0
with class 8
Use endpoints 0x0b (out) and 0x8a (in)
USB description data (for identification)
-------------------------
Manufacturer: Realtek
Product: DISK
Serial No.: not provided
-------------------------
Sending standard EJECT sequence
Looking for active drivers ...
OK, driver detached
Set up interface 0
Use endpoint 0x0b for message sending ...
Trying to send message 1 to endpoint 0x0b ...
OK, message successfully sent
Read the response to message 1 (CSW) ...
Response successfully read (13 bytes), status 1
Trying to send message 2 to endpoint 0x0b ...
OK, message successfully sent
Read the response to message 2 (CSW) ...
Response successfully read (13 bytes), status 0
Trying to send message 3 to endpoint 0x0b ...
Sending the message returned error -1. Try to continue
Read the response to message 3 (CSW) ...
Device seems to have vanished after reading. Good.
Device is gone, skip any further commands
-> Run lsusb to note any changes. Bye!
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