[TriEmbed] Raspberry Pi & remote temp sensor

[Mark Sidell]

I'm new to this list, so I hope the following isn't too off-topic...

I'm using various 1-wire sensors and controllers for home automation. I've
had good luck with products from Hobby Boards, https://www.hobby-boards.com,
using cat5 to connect everything. With cat5, distance has not been an
issue. One way to connect a 1-wire network to an RPi might be to use the
Hobby Boards USB adapter and 4-channel hub. This is how I connect my
network to a generic PC running linux. On the PC, I run the FUSE file
system and OWFS, which make the 1-wire devices appear as regular files.

Mark


On Mon, May 5, 2014 at 1:02 PM, Rodney Radford <ncgadgetry at gmail.com> wrote:

> 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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>
>
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