PaulS:
Every block of data that you send needs to have something in it to define if it is camera data or not. The app that receives the data needs to parse the block of data to decide what to do with the data.
Hello Paul,
thx for your hint! Huch, this seems to be complicated! :-[
I'll try it and 'll give feedback about progress. But possible it'll take some time! 
Greetings!