rtl8821cu WiFi Bluetooth USB 0bda:c820

Fairly new to Linux and this is the first time really I have worked on installing drivers. Ubuntu has always been a server and never really used it as desktop. I am building an openHAB server, and thus the need for wifi and bluetooth. I was not thinking and ordered this "Blueshadow USB WiFi Bluetooth 4.2 Adapter 600Mbps - Dual Band Wireless Network External Receiver, Mini WiFi Dongle for PC/Laptop/Desktop, for All Windows 10 8.1 8 7 XP Vista (600M)"

https://www.amazon.com/gp/product/B08GSBG17K/ref=ppx_yo_dt_b_asin_title_o05_s00?ie=UTF8&psc=1

Ubuntu 18.04

uname -r
4.15.0-128-generic

lsusb
Bus 002 Device 003: ID 0bda:c820 Realtek Semiconductor Corp. 

https://github.com/andydvsn/rtl8821cu_wlan - Installed - wireless works.

https://github.com/andydvsn/rtl8821cu_bt - I cannot get the Bluetooth driver to install

seemed simple enough

git clone https://github.com/andydvsn/rtl8821cu_bt.git
Cloning into 'rtl8821cu_bt'...
remote: Enumerating objects: 44, done.
remote: Total 44 (delta 0), reused 0 (delta 0), pack-reused 44
Unpacking objects: 100% (44/44), done.
[16:58:49] root@linux1:~# cd rtl8821cu_bt
[16:59:00] root@linux1:~/rtl8821cu_bt# make
make -C 8821CU -s
Copy 8821CU firmware to /lib/firmware/rtl8821cu_fw
Copy 8821CU config to /lib/firmware/rtl8821cu_config
make -C ./bluetooth_usb_driver
make[1]: Entering directory '/root/rtl8821cu_bt/bluetooth_usb_driver'
make -C /lib/modules/4.15.0-128-generic/build M=/root/rtl8821cu_bt/bluetooth_usb_driver modules
make[2]: Entering directory '/usr/src/linux-headers-4.15.0-128-generic'
  CC [M]  /root/rtl8821cu_bt/bluetooth_usb_driver/rtk_coex.o
/root/rtl8821cu_bt/bluetooth_usb_driver/rtk_coex.c: In function ‘rtk_check_setup_timer’:
/root/rtl8821cu_bt/bluetooth_usb_driver/rtk_coex.c:544:3: error: implicit declaration of function ‘setup_timer’; did you mean ‘sk_stop_timer’? [-Werror=implicit-function-declaration]
   setup_timer(&(btrtl_coex.a2dp_count_timer),
   ^~~~~~~~~~~
   sk_stop_timer
/root/rtl8821cu_bt/bluetooth_usb_driver/rtk_coex.c: In function ‘rtk_btcoex_open’:
/root/rtl8821cu_bt/bluetooth_usb_driver/rtk_coex.c:2532:2: error: implicit declaration of function ‘init_timer’; did you mean ‘init_timers’? [-Werror=implicit-function-declaration]
  init_timer(&btrtl_coex.polling_timer);
  ^~~~~~~~~~
  init_timers
cc1: some warnings being treated as errors
scripts/Makefile.build:330: recipe for target '/root/rtl8821cu_bt/bluetooth_usb_driver/rtk_coex.o' failed
make[3]: *** [/root/rtl8821cu_bt/bluetooth_usb_driver/rtk_coex.o] Error 1
Makefile:1587: recipe for target '_module_/root/rtl8821cu_bt/bluetooth_usb_driver' failed
make[2]: *** [_module_/root/rtl8821cu_bt/bluetooth_usb_driver] Error 2
make[2]: Leaving directory '/usr/src/linux-headers-4.15.0-128-generic'
Makefile:10: recipe for target 'all' failed
make[1]: *** [all] Error 2
make[1]: Leaving directory '/root/rtl8821cu_bt/bluetooth_usb_driver'
Makefile:10: recipe for target 'install' failed
make: *** [install] Error 2
[16:59:06] root@linux1:~/rtl8821cu_bt# 

I have tried to delete and start over, thank you for reading and any would help would be greatly appreciated.

Edit-1 - removed [github.com/andydvsn/rtl8821cu_wlan] and using github.com/brektrou/rtl8821CU.git

wlan is working, but bluetooth is still not seeing the adapter.

ls /lib/modules/$(uname -r)/kernel/drivers/net/wireless/realtek/rtl8821cu
8821cu.ko



    >     T:  Bus=02 Lev=02 Prnt=02 Port=02 Cnt=01 Dev#=  5 Spd=480 MxCh= 0
    >     D:  Ver= 2.00 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs=  1
    >     P:  Vendor=0bda ProdID=c820 Rev=02.00
    >     S:  Manufacturer=Realtek
    >     S:  Product=802.11ac NIC
    >     S:  SerialNumber=123456
    >     C:  #Ifs= 3 Cfg#= 1 Atr=a0 MxPwr=500mA
    >     I:  If#= 0 Alt= 0 #EPs= 3 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
    >     I:  If#= 1 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
    >     I:  If#= 2 Alt= 0 #EPs= 5 Cls=ff(vend.) Sub=ff Prot=ff Driver=rtl8821cu

I have bought a ACEPC T11 8/128Gb. I have installed Ubuntu 20.04 and everything worked fine but Wi-Fi. I found that the chipset is RTL8821CU even if it is somehow shown as Broadcom. I tried many fixes with no results. Finally I fixed the issue.

I fixed the issue with:

1. git clone https://github.com/brektrou/rtl8821cu.git
2. cd rtl8821cu
3. sudo ./dkms-install.sh
4. Reboot