Davis Weather Wizard - Hacking the Serial Port - Pt.2.5

Hummm... This is getting interesting.  I got curious why when I measured these signals sometimes P2 would be +5V others it would toggle to 0V ( or darn near)   I have now stumbled onto a pattern:

Weather Link connector {Wire colors match w/ signals 3/12}




 

So here is the deal....When I cycle P2 ( GREEN wire)  4x  then P1( YELLOW wire) toggles to voltage level 0V ( could be logic "1" I don't know yet) on the fifth cycle it returns to +5 V.  The pattern is very repeatable, I still don't know what this means yet or if it is even significant.  ...Just sayin'

UPDATE: The signals now match the wire colors to avoid confusion 3/12/12