So you are saying that if I create a VIRTUAL 3way switch using 2 US2-40 switches, the M1 will only know if I turn the light on from the load controlling switch? The M1 will not know the light is on if I use the linked switch?Steve said:If you manually control a switch, the M1 should see it fine. A UPB switch will transmit its status locally, but if a switch changes as a result of receiving a link, then you will not see that switched status change. Thats an issue with UPB and the only solution is really to do polling - or, instead of having UPB devices control each other directly via links, have the M1 pick up the link and have the M1 control the device, then it will always know the status.
And it appears the M1 doesn't support polling for UPB, so it there any good workaround? Using the M1 to translate two non-linked devices seems like trouble if you want to do any dimming, right?