I put the new AAG anemometer up today and in the process I moved 1-wire lightning detector to the same location.
The way I connected it all up was as follows:
Anemometer with RJ11 into cat5 cable to an RJ45 into the lightning detector.
Lightning detector with RJ45 into cat5 cable to RJ11 into the 1-wire USB adaptor at the PC.
Set like this I get no readings at all from anything and in the Dallas setup in WD it says “No wind instrument detected”.
I tried putting the lightning detector at the end of the line so that it fed through the anemometer to the PC and got the same thing. But if I by-pass the lightning detector and link the anemometer direct to the PC (via the 2 lengths of Cat5 cable) then it works fine.
So it seems that the cables are fine, the anemometer is fine but there is something wrong with the lightning detector that blocks all the signals once it’s put on the 1-wire system.
Anyone got any ideas or had this experience?
Oh, and the lightning detector was hard wired using the screw clamps before I moved it and it worked fine.
BTY, the new anemomter has a much faster update than the old WS2300 one the it replaced, updates about once every 2 seconds!! 
I just wish I could get the lightning detector working again. :?
I emailed Eric at Hobby Boards and he thinks it could be down to the cables not being wired correctly.
I had the cables made with RJ45s on one end and RJ11/RJ12 on the other. I thought that only the centre two wires were used so I had all the of them wire “Point to Point”. But now Eric has pointed me in the direction of the wiring diagram on his site then the there may be a problem with the way I’ve had the RJ11’s done. #-o
Still, it’s not a hard job to re-do the plugs, I just need a crimping tool and a couple of plugs.
Ebay here I come!!
OK, I sorted the cables today and made the RJ11’s so that they only have the central two pins wired, no other wires from the cat5 cable are connected.
The anemometer works on it’s own, so does the lightning detector but no matter which way I wire them up, with both on the circuit I get no signals detected at the PC! 
I tried using the screw connectors on the lightning detector, that was OK but as soon as I connected the anemometer into one of the RJ45 connector then it stopped sending data.
I connected the anemometer to the PC then used a lead into the screw terminals on the lighting detector, nothing.
I think it’s time to buy a crimping tool and go over the cables again and use the 4-wire RJ11 connection that Eric has on his site. Trouble is, the cat5 cable I have is a different type to the one he describes. But I’ll work it out in the end…I hope! 
If anyone has this type of problem with the 1-wire setup then let me know how you got over it. :thumbright:
Oh, and I had a good clean up of the PC today and fitted an extra 1Gb RAM chip (making 2Gb of RAM in total) and WOW is this thing fast now!!!
Right, I finally got it all working again.
The problem was the long Cat5 lead to the lightning detector. When I had it made up the guy put the wires into the RJ45 upside down. #-o
I put a new connector on the end, the same way round as is on Eric’s site and it’s all working.
I still get thunder from the PC every time I switch a light on in the house, but I can live with that for now.