rtl8821CU

This is a fork from the whitebatman2/rtl8821CU library. Compilation error FIX on ARM devices -> "gcc: error: -mfloat-abi=soft and -mfloat-abi=hard may not be used together"

Tested in following environments.

Kernal 4.19.62-sunxi, Ubuntu 18.04.3 boinic.
Linux raspberrypi 4.19.97-v7+ armv7l GNU/Linux

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.

Build and install with DKMS

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

Build and install without DKMS

First, makesure the kernel headers are installed RaspberryPi -> sudo apt install raspberrypi-kernel-headers

Use following commands in source directory:

make
sudo make install
sudo modprobe 8821cu

Checking installed driver

If you successfully install the driver, the driver is installed on /lib/modules/<linux version>/kernel/drivers/net/wireless. Check the driver with the ls command:

ls /lib/modules/$(uname -r)/kernel/drivers/net/wireless

Make sure 8821cu.ko file present on that directory