[TriEmbed] Raspberry Pi & remote temp sensor

[Rodney Radford]

Here is a good technical writeup of the issues and implications of medium
and long range 1-wire sensor networks.   From my review of what is posted,
10-15' should not be a problem.

http://www.maximintegrated.com/app-notes/index.mvp/id/148

I can also state that I have run 1-wire systems much farther than that, and
it worked, but never investigated whether this was just by luck on my part
or whether it is supported.

They show a simple RC filter for distances of 10-100 meters - well beyond
what you are doing, so I think you will be fine.  Especially since this
will be out on a trail and away from any major/noticeable electrical noise
producers.



On Fri, May 2, 2014 at 4:06 PM, Grawburg <grawburg at myglnc.com> wrote:

> I have an RPi set up with two DS18B20 temperature sensors - one is fixed
> on a breadboard and one is the waterproof unit with about a meter
> extension (got from AdaFruit).  Works fine as is. I do not need a
> waterproof sensor but would like to put the sensor 10 to 15 feet away from
> the RPi: we are measuring the temperature at different points in a room.
>  What's the reasonable limit for extending the sensor away from the Pi?
>
>
> Thanks,
> Brian Grawburg
>
> --
> I will no longer use Mozilla/Firefox. I now use Opera Web Browser.
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