Problem to install RTL-SDR

[DKS302]

Hi there!

I hey to install The RTL-SDR but it failed.
I add the RTL-SDR in My Hardware and get this in The Protocol (See Picture)
Then I try to install the Software from the Wiki, but it does not work.
My System is a Raspi 1, with the actual Updates and Upgrades abe The last Domoticz.

Someone have a step by step instruction that I can get it to work?
THX Torsten