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Re: A Request - 1 Wire Network
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Posted by Bill - WEL0043 on Sunday, 23 May 2010, at 12:00 a.m.,
in response to A Request - 1 Wire Network, posted by Bill Cherry
Bill, here are my comments / suggestions.
Once you get beyond a handful number of 1-wire devices on your 1-wire network, the quality of your 1-wire network will substantially affect reliability of being able to read every sensor every time.
In my case I have a lot of sensors, and thus did a number of things to ensure highest quality 1-wire network possible, including:
1.) I used CAT 5 cable exclusively (with no mixing of 5e, 6, etc.).
2.) I studied this document:
pdfserv.maxim-ic.com/en/an/AN148.pdf
"Guidelines for Reliable Long Line 1-Wire Networks"
3.) Noting the above document, I made my 1-wire network 'linear' with little exception (requires a lot more cable).
4.) I used wire nuts for every sensor connection to the cable, to ensure ultra-reliable connections.
5.) I do not have any outdoor cabling (concerned about deterioration, static charge, and grounding challenges)
I had learned with another 1-wire interfacing product how difficult reliability can be. When I installed my WEL, I was thus very careful to do everything above to ensure max reliability. So far remain problem free.
Hope this helps.
Best regards,
Bill
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