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[marineau]

That is what occurs when two differents signals RF X10 are received by your W800RF32A(or V572) at the same time ?

Exemple:
I press on my PalmPad to B1 ON at 12:01:55
My wife press on same time on his PalmPad to B2 OFF at 12:01:55

Does any command will be lost ?

[Brian H]

Both maybe scrambled; as two RF signals to ANY RF receiver; WGL or X10 can be a problem. Polite most times is if the unit will hold a transmission if another powerline signal is seen.

[vhoang]

Yes. it can get lost.

see thread: http://www.x10community.com/forums/index.php?topic=10680.msg62408#msg62408

The V572 does the decoding itself, when two streams are received, it will not register.

With the W800, you get the raw RF data so you can programmatically decide if a segment of a collided x10 stream is a valid X10 message using standard x10 bit validation.   

Because the rf remotes send complete X10 signal many many times per button push you only need 1 (validated X10) to react to.

Most program require x3 repeats before calling it a good X10 message.   And in a dual signal situation, it will always fail.  In my test you can get good enough validation with just 1 message, and be able to handle limited cross remote signals.   Repeat validation is possible if you feed the input into a array buffer of similar messages and split the collided stream into individual streams of repeated messages.