Mmm thats true. And the noise from the second receiver will interrupt the signal from the first receiver, therefor it wont work.

Ok, I made some test now that didn't work. But it is the diode that makes trouble. Too bad I don't have a BAT85 to test with, just 1N4148.
I connected one receiver directly to the Mega, it works. I connect the receiver via an 1N4148, doesn't work. Hmm.

No it wont, but does it care?

Why not? To connect two outputs to one input like this aint nothing new.

Thinking about an idea... What about connecting two receivers at the same time, to the same input? One for 433MHz and one for 868MHz. Of course you cant just connect them, I was thinking of using diodes. Something like a 1N4148 or BAT85 on each receiver output and to the Mega's input pin. I know the...

For sending the code has to be altered so you can select which transmitter to use. But for receiving it would be possible to use the code as it is. I'm thinking of connecting the data pins of two receivers to one Mega pin through Schottky diodes. They have a low voltage drop and acts as an or-gate w...