"Pio AVR's dont respond even to a poll request - it needs to turn on first, even on a room 2 or 3."

This years' SC-07 and SC-05 use an improved 232 circuit that works the way it should. One command to wake the port (it doesn't turn on the Main Zone - FINALLY) and another command to actually turn on the Zone you need.

Diesel, I swear I have not heard this complaint. One of these days the module will be finished for the SC-07.