Thomas Paine wrote:
> I am trying to get the hardware assembled for my one-wire network. I
> have a bunch of DS18B20 temperature sensors.
> I'm not clear on wiring the pinouts of the chip to the one-wire bus.
> I use the standard pinouts of cat-5 as I use for networking
> w-g, g, w-o, b, w-b, o, w-br, br.
> The LinkUSB says I should use pins 1, 2, and 4 for communication.
> Looking at the device I would take this as
> brown for ground
> white-brown for power +5 vdc
> white-blue for comms
> Am I reading this backwards? The picture is confusing. It looks like
> it's upside down maybe?
> How else does everyone using the cat-5 wire do their sensors up?
What I did was to string CAT 5e to each room of my house where I thought I might want it. I use parasitic power for the 1-wire so it only needs 1 of the pairs. 1 pair is used for phone and the other 2 pairs for Ethernet. I break the cables out in my garage to a RJ45 patch panel and 66 block for 1 wire and phone. From the 66 block I cable over to a 1 wire hub.
The other end is broken out to 2 RJ45s and 1 RJ11 in a a low voltage box. I am able to have miles of wire running everywhere and still have a very clean professional look. It might not be a great idea mixing a phone line in the same CAT 5 but it seems to work fine for me.