Connectivity Eufycam first generation and Eufycam second generation

I have 3 Eufycams from the first generation. What are the possibilities between the first and second generation? For example; can i connect a Eufycam2 to my hub from the first generation? Or can i connect Eufycamera’s from the first generation to the hub of the second generation without losing functionality’s? etc.
If that information is avaiable on the Eufy-site where can i find it?

Is there somebody?