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71 lines
2.0 KiB
Markdown
71 lines
2.0 KiB
Markdown
# Realtek RTL8811CU/RTL8821CU version 5.4.1 USB wifi adapter driver for Linux 4.20.x
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Before build this driver make sure `make`, `gcc`, `linux-header` and `git` have been installed.
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## First, clone this repository
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```
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git clone https://github.com/brektrou/rtl8821CU.git
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```
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## Build and install with DKMS
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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.
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### Debian/Ubuntu:
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sudo apt-get install dkms
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### Arch Linux/Manjaro:
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sudo pacman -S dkms
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To make use of the DKMS feature with this project, do the following:
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DRV_NAME=rtl8821CU
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DRV_VERSION=5.4.1
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sudo cp -r ${DRV_NAME} /usr/src/${DRV_NAME}-${DRV_VERSION}
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sudo chown -hRv root:root /usr/src/${DRV_NAME}-${DRV_VERSION}
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sudo dkms add -m ${DRV_NAME} -v ${DRV_VERSION}
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sudo dkms build -m ${DRV_NAME} -v ${DRV_VERSION}
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sudo dkms install -m ${DRV_NAME} -v ${DRV_VERSION}
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If you later on want to remove it again, do the following:
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DRV_NAME=rtl8821CU
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DRV_VERSION=5.4.1
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sudo dkms remove ${DRV_NAME}/${DRV_VERSION} --all
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## Build and install without DKMS
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Use following commands:
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```
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cd rtl8821CU
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make
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sudo make install
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```
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## Checking installed driver
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If you successfully install the driver, the driver is installed on `/lib/modules/<linux version>/kernel/drivers/net/wireless/realtek/rtl8821cu`. Check the driver with the `ls` command:
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```
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ls /lib/modules/$(uname -r)/kernel/drivers/net/wireless/realtek/rtl8821cu
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```
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Make sure `8821cu.ko` file present on that directory
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## Raspberry Pi
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To build this driver on Raspberry Pi you need to set correct platform in Makefile.
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Change
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```
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CONFIG_PLATFORM_I386_PC = y
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CONFIG_PLATFORM_ARM_RPI = n
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CONFIG_PLATFORM_ARM_RPI3 = n
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```
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to
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```
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CONFIG_PLATFORM_I386_PC = n
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CONFIG_PLATFORM_ARM_RPI = y
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CONFIG_PLATFORM_ARM_RPI3 = n
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```
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For the Raspberry Pi 3 you need to change it to
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```
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CONFIG_PLATFORM_I386_PC = n
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CONFIG_PLATFORM_ARM_RPI = n
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CONFIG_PLATFORM_ARM_RPI3 = y
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```
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