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Re: ot2m wx lacrosse 2350/2355 and ultimeter 100/2100

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  • Rudolf Benner
    This is all very confusing for someone just starting out. The bottom line, which is the best-bang-for-the-buck weather system. ... and ... an ... nail ... can
    Message 1 of 32 , Dec 4, 2008
    • 0 Attachment
      This is all very confusing for someone just starting out. The bottom
      line, which is the best-bang-for-the-buck weather system.

      --- In tracker2@yahoogroups.com, Scott Miller <scott@...> wrote:
      >
      > > read the ultimeter
      > > 2100 is the best and is working bt do i need the humidity sensor?
      and
      > > how is the wiring config
      >
      > It will work without the humidity sensor, it just seems to report
      an
      > incorrect value sometimes if it's missing. I haven't been able to
      nail
      > down that bug yet.
      >
      > > from the ultimeter to ot2m??and how is the config in the ot2m??
      can i use
      > > the config i have on
      > > lacrosse and how do i get the ot2m to TX,..?.. with the lacrosse
      and the
      > > config i made some times
      > > it did work and somt times not
      >
      >
      > The LaCrosse interface seems to be just plain unreliable. It can
      take
      > many retries to get all of the required information. If something
      has
      > changed with the timing in the new models, it wouldn't surprise me
      if it
      > doesn't read reliably.
      >
      > The Ultimeter stations, on the other hand, are very reliable. You
      just
      > need to set the port mode to AUTO and set the baud rate and it
      should work.
      >
      > Davis Vantage Pro support is working now, and will be in the next
      T2
      > firmware release.
      >
      > Scott
      >
    • Stephan mn tellaroli
      Hei se vedl http://spaces.live.com/spacesapi.aspx?wx_action=create&wx_url=/friends.aspx&mkt=en-us
      Message 32 of 32 , Jan 31, 2009
      • 0 Attachment
        Hei
        se vedl
        stephan

        > To: tracker2@yahoogroups.com
        > From: tom@...
        > Date: Tue, 20 Jan 2009 01:33:50 +0100
        > Subject: Re: [tracker2] ot2m wx lacrosse 2350/2355 and ultimeter 100/2100
        >
        > On Wed, 03 Dec 2008 00:51:23 +0100, Scott Miller <scott@...>
        > wrote:
        >
        > > Both of those Ultimeter models should work, though I've got at least one
        > > report of a problem when the humidity sensor isn't attached.
        > >
        > > How do you have the LaCrosse stations connected?
        > >
        >
        > Scott
        >
        > I've been trying to help Stephan with his LaCrosse problems.
        >
        > As far as I can tell, the LaCrosse violates the RS-232 standard,
        > as there is no connection to pin 5 on DB-9, which is GND.
        >
        > Instead they use pin 4, DTR and pin 7, RTS when connecting to the PC.
        > Those two are both output signals from the PC, and negative when idle.
        >
        > This is probably a devious scheme to save a few cents (eurocents) on the
        > RS-232.
        >
        > When you tested the LaCrosse function, did you have the WS connected
        > without a Y-cable?
        >
        > If the LaCrosse needs a negative voltage to function, it would not work on
        > the Y-cable.
        >
        > Let's hope they use diodes, otherwise there could be a problem with pin 4
        > being +5V/+12V
        > and pin 7 being -10V.
        >
        > BTW I found an error in the Tracker2 manual. It says pin 7 is CTS, and pin
        > 8 is RTS.
        > It's the other way around. The schematic is correct.
        >
        > Tom
        >
        > --
        > Email: tom@... (ttwist@..., lb8x@...)
        > Phone: +47 21688655/90662366, Ham call sign: LB8X Locator: JO49UA
        > Snail: Tom Twist, Kirkeveien 8A, N3970 Langesund, Norway
        >
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