> I've experienced such problems as well, but it only occurs if the network
> gets too large. E.g. if I connect (even an empty!) cable with 20 meters,
my
> network breaks down completely.

I have 2 x 1-wire networks and I'm about to add a third. 

The longest segment is probably about 80m-100m long with about 25 sensors
and the other is probably 70m and has about 20 sensors. All cabling is CAT5e

I'm using the:

- Link-USB adaptors http://www.ibuttonlink.com/linkusb.aspx

- DS28EA00 based temperature sensors.
http://owfs.org/index.php?page=ds28ea00

I'm powering each sensor board from a 12V DC supply that runs through
another pair in the UTP cable and each sensor board has an on-board 5V
regulator. I chose this combination of adaptor and sensors because they are
supposed to have improved reliability and noise immunity. So far I found it
to be quite reliable.

HTH

Alex 


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