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Thread: Dallas 1-Wire weather instruments

  1. #1
    Join Date
    Apr 2003
    Hamilton, Ohio

    Default Dallas 1-Wire weather instruments

    Does anybody have experience with the Dallas 1-Wire weather sensors? I'm looking at the temperature/humidty & barometer sensors and possibly the lightning detector. I already have a Peet Bros. Ultimeter 100 with the raing guage and I love it but I want to add sensors in a cost effective way. I believe my software will allow this.

    Here's the website. Not sure about the company selling these either but I'll take a chance... I like the prices!

    I'm under the impression you have build the boards. I've soldered some wires together but that's about the extent of my soldering experience to date. I can get help though. Am I correct in my thinking and how difficult is it to put these together? I'm aware I'll have to buy the USB adapter and probably a hub. I have lots of CAT5 cable.

    If I don't purchase these 1-Wire sensors, I'll be upgrading to the Ultimeter 2100 at the Dayton Hamvention in May.

    Thoughts? Opinions? Suggestions?


    Dale KC8HQS

  2. #2


    Dale -

    I already have a Peet Bros. Ultimeter 100 with the raing guage and I love it but I want to add sensors in a cost effective way. I believe my software will allow this.
    Do NOT make the assumption that the 1-Wire sensors will interface with your Davis WX system.

    The 1-WireŽ WX station instruments you are inquirying about originated in mid-1990s as a developer/experimenter offering by Dallas Semiconductor - now part of MAXIM INTEGRATED.

    1-WireŽ Training Courses (Adobe Flash required)

    Will Beals, N0XGA and Russ Chadwick, KB0TVJ , with expert consulting from the late Dr. R. John Morgan (sk, 1999), developed the T-238 APRS/WX station kit to use these Dallas 1-WireŽ WX sensors.

    The original T-238 kit was awarded second prize in Circuit Cellar Magazine's - Design99 Contest and
    was featured in the May 2000 issue of Circuit Cellar Magazine.
    The T238+ was a follow-on offering based on the original design.
    TAPR offered these T-238 kits to radio amateurs for several years.
    T-238 Plus kit

    AAG Electronica LLC based in Laredo, TX assumed production (Mexico and Texas) of the actual Dallas/MAXIM 1-WireŽ WX instruments and sensors, once the initial Dallas special production of the 1-WireŽ instruments ceased.

    AAG Electronica LLC
    17409 College Port Dr.
    Laredo, Texas. 78045
    United States

    HOBBY BOARDS -- I know nothing about this company.
    I do NOT purchase products from blind companies (no mailing/shipping address).
    This tells you that web page is hosted in Houston, TX, BUT no ownership info.

    KNOW what 1-WireŽ WX instruments and sensors you are buying !!!
    AAG Electronica LLC makes WX instruments in 3 varieties (RJ11, RJ12, RJ45),
    as shown on their web page. Their newest offering supports RS-485.

    How to Build a 1-WireŽ Evaluation Kit
    By: C. Michael Haight
    May 14, 2012
    Abstract: The 1-Wire product family includes numerous devices that can be easily evaluated using a WindowsŽ-based PC with a USB port and free demo software from Maxim's website. This tutorial describes parts that can be used for the hardware and explains how to download the software.
    Last edited by W9GB; 12-21-2012 at 09:05 PM.
    Nullius in verba

  3. #3


    All weather stations use some type of communication method (wire or wireless) between the remote (outdoor) sensors and the indoor WX station console (user interface).

    Micro-controller Communication interfaces(RS-232, RS-485, 1-Wire, I2C, SPI, etc.) are standardized by companies (de facto) or standards bodies (IEEE, EIA/TIA).

    Dallas/MAXIM 1-Wire

    Phillips I˛C ("eye-squared cee" or "eye-two-cee") Inter-Integrated Circuit; generically referred as two-wire interface.˛C

    Motorola Serial Peripheral Interface Bus or SPI (pronounced as either "ess-pee-eye" or "spy") bus

    BUS PIRATE is a useful tool for the hobbyist and experimenters -- parts to projects.

    EEPROM chips are often used with the three most popular:
    DS2431 (1-Wire), 24AA- (I2C), and 25AA- (SPI).
    Last edited by W9GB; 12-22-2012 at 09:09 PM.
    Nullius in verba

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