Adding SkyConnect Dongle according to Blog Post or better Youtube
Synology has disabled USB drivers. Additionally one important driver is not available on Synology DSM 7+. Thus we need to enable some USB drivers plus download one driver and enable this on the system. For future DSM updates we need to add a Scheduled Task, so that the drivers will be loaded.
This Tutorial works for DS920+. In case your NAS has another processor, change "geminilake" within the commands to your processors architecture name, as described in https://kb.synology.com/en-global/DSM/tutorial/What_kind_of_CPU_does_my_NAS_have!
1. Download usb drivers from Github
git clone https://github.com/robertklep/dsm7-usb-serial-drivers.git ~/dsm7-usb-serial-drivers
ls /dev/ttyU*
sudo cp ~/dsm7-usb-serial-drivers/modules/geminilake/dsm-7.2/cp210x.ko /lib/modules
sudo chmod 644 /lib/modules/cp210x.ko
sudo chmod +x ~/dsm7-usb-serial-drivers/usb-serial-drivers.sh
sudo sh ~/dsm7-usb-serial-drivers/usb-serial-drivers.sh start
Now it should list your USB Device
ls /dev/ttyU*
Select script to be exectued as root!
cp ~/dsm7-usb-serial-drivers/modules/geminilake/dsm-7.2/cp210x.ko /lib/modules
bash ~/dsm7-usb-serial-drivers/usb-serial-drivers.sh start
For anyone having issues here, remove "/dsm7-usb-serial-drivers" from the commands