Page 1 of 1
Creating a 1-wire bus
Posted: Thu Feb 23, 2012 11:43 pm
by vanisher
What is the best method to create a one-wire bus with at least 14 DS18B20's with a Jeenode.
I want to measure the ingoing and outgoing temperature of the floorheating tubes.
What cable to use? Any best practices with connectors or something?
Soldering can be done but is not very flexible i'll guess.
Re: Creating a 1-wire bus
Posted: Thu Feb 23, 2012 11:56 pm
by Digit
The legs of a DS1820 fit nicely into RC servo connectors (Robbe brand, in my case):
http://blog.hekkers.net/2010/06/08/new-sensor-shipment/
Re: Creating a 1-wire bus
Posted: Fri Feb 24, 2012 10:52 pm
by Stevexyz
http://www.1wire.org/media/A_Guide_to_t ... _Draft.zip
This is not an official standard by Dallas or Maxim, it's a proposed one and it works perfectly for me. I use the 6-pin RJ-12 connections and colours so I don't get it confused with Ethernet
but otherwise RJ-45 might well be better.
The Maxim site has some application notes about building a 1-wire bus, how to avoid reflections, that sort of thing.
Cheers, Steve
Re: Creating a 1-wire bus with HA7Net
Posted: Sun Feb 26, 2012 10:08 pm
by Verkenner
Posted: Tue Feb 28, 2012 10:09 pm
by gvdham
That's a Nice solution, but is there a low cost solution that works with domotiga?
Re: Creating a 1-wire bus
Posted: Tue Feb 05, 2013 12:54 am
by hellbringer
Do they need to be programmable? I dont know if these are programmable, but if you need just temperature, I use a kit:
"PCsensor 1 wire miniLAN thermometer, 4 channels thermeter (1 W_D4)" from eBay ->
link there is also a 8 sensor version:
link
There is also a version that check humidity but I dont know if that is compatible, they use the same connectors but a different donge (I got the 'USB9097')
The seller is "chenmerhk" /website:
http://pcsensor.com/
They use a standard 3,5" audio cable (with the standard audio 'jack' plugs) that you can get at any hardware or audio store.
I run Domotiga on a Raspberry Pi and interface them using digitemp (digitemp_DS9097U), simple, clean, cheap, no soldering required.