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Links to Maxim/Dallas One Wire Weather Station System and Devices w/ Stamp Reso — Parallax Forums

Links to Maxim/Dallas One Wire Weather Station System and Devices w/ Stamp Reso

Bruce BatesBruce Bates Posts: 3,045
edited 2006-02-15 22:41 in BASIC Stamp
Folks -

Here is a somewhat incomplete list of links to web sites which make reference to, or contain information about the Maxim/Dallas One Wire Weather Station from 1998, the 1-wire and iButton devices which are supported in that system, or·similar weather project systems, and/or Basic Stamp articles regarding those devices, or that system.

Original Maxim/Dallas One Wire Weather Station Project link:
http://www.maxim-ic.com/products/ibutton/weather/

Excellent Sensors Magazine article on the Maxim/Dallas One Wire Weather Station (OWWS). The text and diagrams contained herein are priceless to the understanding of many of the various electro-mechanical sensors employed in the OWWS, as well as gaining an important insight into the system overview:
http://www.sensorsmag.com/articles/0698/wir0698/index.htm

Matt Parnell's Weather Stamp which appears to have been temporarily discontinued with only some suppport documents remaining:
http://www.parnelleng.com/support/weatherstamp/

Link to Texas Weather Instruments, provider of the ORIGINAL one wire weather instruments: http://www.txwx.com/

Link to AAG - Automatizacion Aplicada a Gasolineras a Mexican resource for the one wire weather instruments: http://www.aag.com.mx/indexaag.html

Tim Bitson's One Wire Weather Page for the Basic Stamp, PalmOS, Mac OS X, and TINI: http://homepage.mac.com/tbitson/weather/

An amateur radio club site with various 1-wire weather·information and links:
http://www.slvrc.org/weather/dallas1w.htm

Various 1-wire weather instrument links including a 1-wire barometer link:
http://www.discovercircuits.com/W/weather-instr.htm

Regards,

Bruce Bates

Comments

  • Terry KingTerry King Posts: 12
    edited 2006-02-15 15:59
    Bruce, Thanks for your work on this.

    I have a question about using the 1-wire parts on older BS2 systems that do not have built-in "One-Wire" commands. Can you point to BS2 code that bit-bangs the 1-wire devices??

    I need to do a class soon on temperature measurement and want to use the DS1820. But I have a classroom of BS2 / Homework boards, no BS2sx etc. I want to hide the complexity of the 1-wire protocol at this time (Although I'll show how it works, generally)..

    Any suggestions??

    Thanks!

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    Regards, Terry King ...On The Mediterranean in Carthage, Tunisia, North Africa
    American Cooperative School of Tunis
    terry@terryking.us
  • Bruce BatesBruce Bates Posts: 3,045
    edited 2006-02-15 17:02
    Terry -

    Unfortunately, there is no way to "bit-bang" the 1-wire protocol using a PBASIC Stamp I or Stamp II series. It could probably be done with the more advanced Parallax SX series using the Parallax SX/B Basic Compiler, which allows you to drop into assembler if need be. Fear not however, there is another avenue of approach.

    Maxim/Dallas realizes that not all equipment will be able to interface with this rather unusual, proprietary, 1-wire protocal directly. Thus, they have provided a number of different interface chips to overcome this problem. The list of these chips, which interface they use, and links to the individual chips can be found below.

    The Maxim/Dallas 1-wire interface chip most commonly used with those PBASIC Stamps which do not directly support it, is the DS-2480 RS-232 ==> 1-wire interface. Here are those various interface chips:
    http://para.maxim-ic.com/Default_1WireInterfaceProducts.htm

    Regards,

    Bruce Bates

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  • Terry KingTerry King Posts: 12
    edited 2006-02-15 22:24
    OK, Bruce, I have looked over the DS2480 and the Appnotes. I think I understand how it can relieve
    the timing contraints that the Stamp2 would have. I plan to get some from Digikey...

    Now: IsThere BS2 example code of USING this chip somewhere?? I'd prefer not to reinvent that
    wheel, but I can dig in if necessary...

    Thanks!

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Regards, Terry King ...On The Mediterranean in Carthage, Tunisia, North Africa
    American Cooperative School of Tunis
    terry@terryking.us
  • Bruce BatesBruce Bates Posts: 3,045
    edited 2006-02-15 22:41
    Terry -

    It looks like the BS-2SX may be a better choice of Stamps for use with this interface. Here is the reason I say that, which also gives some hints on its use:
    http://forums.parallax.com/forums/default.aspx?f=5&p=1&m=91925#m95611

    Regards,

    Bruce Bates

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