I just ordered the OOK plug and I am a bit disappointed with the reception.
I have hooked it up to 3.3V, so i have not tried 5V yet. I have attached a 17cm antenna.
My KAKU switch can receive easily through 2 concrete floors. The OOK plug doesn't receiver through 1 concrete floor. Even 2 walls (gipsblokken) results are unreliable. The outdoor Oregon sensor is also not noticed...
I enabled the activity LED and I see there is continuous pulse activity.
I have read a post in the Nodo forum about china receivers having noise levels above the TTL level causing the arduino to be constantly busy checking rubbish. http://code.google.com/p/arduino-nodo/issues/detail?id=82
Has there been a comparison of the OOK plug receiver with the aurel receiver from conrad?
I will try 5V next. Hopefully this is the solution.