RFLink not working 100%

[crazynight]

Evening Guys and Girls,

Looking for some advice of where to start fault finding some issues I am having with the RFLink.

I started off with a cheap rx & tx with a mega to make my own RFLink all worked ok for the cheap bye-bye standby sockets but it never picked up my Boiler controller or the OWL Power monitor and would only see the Siemens PIR's intermittently (more not)

Assuming it was the cheap rx & tx I ordered a new Aurel RTX MID 5v direct from nodo-shop.nl and installed it this evening however things are not much better, it is now picking up the OWL power monitor but not the Boiler controller or Siemens PIR's (DCACC3).

I have got the Mega connected to the RPi and is powered by the 12v jack.

Any suggestions welcome.