My apologies; this message got buried.... If I recall correctly, we tried setting the alarm thresholds on the 18B20's, then execute a syncronous convert, and all the temp sensors show up in alarm, even though their temperature hasn't changed. We tried to continue, in case it was just a temporary error, but it is not; every conversion results in all temperature sensors being in alarm mode.
One of our students worked with this in more detail, I can get more info from him. We were also hoping to build a "One-wire protocol debugger" this summer and use it to address the alarming on both the 18B20 and the 2450 (which has other alarming problems). Thanks! --Jim On Mon, Apr 28, 2008 at 1:21 PM, Paul Alfille <[EMAIL PROTECTED]> wrote: > On Mon, Apr 28, 2008 at 1:10 PM, Jim Kusznir <[EMAIL PROTECTED]> wrote: >> >> And currently the temperature alarming is very, very broke. > > > This is the first report on this problem. Can you tell me more? > > Looking through the data sheet > (http://datasheets.maxim-ic.com/en/ds/DS18B20.pdf) the alarm > should be set whenever the temperature is out of range. No explicit alarm > activation or clearing is given. > So either owfs isn't setting the Temperature limits correctly, or it isn't > searching the alarm register correctly. > > I'll try some tests, but if you have more information that would be helpful. > > Thanks, > > Paul Alfille > > ------------------------------------------------------------------------- > This SF.net email is sponsored by the 2008 JavaOne(SM) Conference > Don't miss this year's exciting event. There's still time to save $100. > Use priority code J8TL2D2. > http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone > _______________________________________________ > Owfs-developers mailing list > Owfs-developers@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/owfs-developers > > ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Owfs-developers mailing list Owfs-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/owfs-developers
