Paul Alfille <paul.alfi...@gmail.com> probably said: >Wonderful. > >The humidity sensor as first published in "Sensors" magazine by Dan >Awtrey used the HIH-3600 sensor and the VDD and VAD pins of the >DS2438. > >See http://www.elin.ru/files/pdf/1-Wire/humsensor.pdf -- it's nicely written. > >In my naivety I created a humidity file off the main DS2438 directory >calculating humidity using this circuit. It confused people who had a >DS2438 not set up for humdity (I think they hoped to get humidity for >free) but worked with all the extant humidity sensors. > >Once Honeywell upgraded to the HIH-4000 and others used the HTM1735 I >had a bit of a problem. For backwards compatibility the main humidity >stayed calculated assuming the HIH3600, but to be accurate you need to >know your sensor design and use the correct humidity reading: > >HIH3600/humidity >HIH4000/humidity
Ah. I wasn't aware of this, good timing though since I'm just messing with a MultiSensor MS-TH which the docs tell me is HIH4000 based. The problem is that some experimentation with the ow python module (the one shipped with owfs) is I can't find a way to get at HIH4000/humidity. I can read sensor.humidity ok, and HIH4000 is listed in sensor.entryList() but trying to use it as an attribute with sensor.HIH4000.humidity just gives me: AttributeError: HIH4000 Any other seperator between the two that I've tried gives the same or the while string as an error. I could presumably do the maths to adjust the HIH-36xx calculation to the HIH-4000 calculation but that seems a bit silly when it's built in. I also can't get at MultiSensor/type, etc. Anyone know how to get at these sub-attributes in owpython? Ta, P. >HTM1735/humidity >and now >DATANAB/humidity > >Because the DATANAB identifies itself, I can have the main humidity >point to DATANAB/humidity if it's a DATANAB design, and >HIH3600/humidity otherwise. > >Can you tell me if you have > >DATANAB/reset >DATANAB/humidity > >displayed in your directory? > >Paul Alfille > > >On Tue, Jun 21, 2011 at 1:57 PM, Matthias Lemke <m...@box.li> wrote: >> >> >> Paul Alfille schrieb: >>> A minor release, mainly to get the Datanab humidity support out there. >>> >>> New release 2.8p10 >>> >>> 1. Support for the DataNAB humidity sensor. >>> 2. Don't cache empty directories >>> >>> The DATNAB humidity sensor uses the familiar HIH-4000 sensor and the >>> DS2438 like the other humidity sensors, but measures sensor voltage >>> with the current sensing pins rather than the VAD pins. >> >> the Datanab probe works like a charme. >> the correct value for humidity is in ./humidity >> HIH3600/humidity >> HIH4000/humidity >> HTM1735/humidity >> have different values.... right? >> >> mercy >> >> math >> >> ------------------------------------------------------------------------------ >> EditLive Enterprise is the world's most technically advanced content >> authoring tool. Experience the power of Track Changes, Inline Image >> Editing and ensure content is compliant with Accessibility Checking. >> http://p.sf.net/sfu/ephox-dev2dev >> _______________________________________________ >> Owfs-developers mailing list >> Owfs-developers@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/owfs-developers >> > >------------------------------------------------------------------------------ >EditLive Enterprise is the world's most technically advanced content >authoring tool. Experience the power of Track Changes, Inline Image >Editing and ensure content is compliant with Accessibility Checking. >http://p.sf.net/sfu/ephox-dev2dev >_______________________________________________ >Owfs-developers mailing list >Owfs-developers@lists.sourceforge.net >https://lists.sourceforge.net/lists/listinfo/owfs-developers -- pir ------------------------------------------------------------------------------ EditLive Enterprise is the world's most technically advanced content authoring tool. Experience the power of Track Changes, Inline Image Editing and ensure content is compliant with Accessibility Checking. http://p.sf.net/sfu/ephox-dev2dev _______________________________________________ Owfs-developers mailing list Owfs-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/owfs-developers
