Thanks for that Eloy, I suspected that would be the case. I would be interested to hear your experiences with it when it goes into your 'production' environment. I am planning to measure and control humidity in our pool area, but have several things above that on the priority list, so it won't be for a while yet.
Cheers Mick On 03/02/12 21:34, Eloy Paris wrote: > Hi Mick, > > On 02/03/2012 04:23 PM, Mick Sulley wrote: > >> Does anyone have any experience of the DHT11 temp/humidity sensor? I >> just found it while looking for something else, it sounds very cheap for >> a combined temp and humidity sensor, £2.75 on eBay, but I am not >> convinced that it is compatible with 1-wire and owfs as I don't see any >> address in the description. >> >> There is a description here >> http://www.ladyada.net/learn/sensors/dht.html but my limited technical >> knowledge can't determine if it would work or what else would need to be >> done to get it to work. > I have experience with the DHT11's older brother, the RHT03. Both work > very similarly and as far as I know the only difference is price (one > has better accuracy and temperature and humidity range than the other). > > Without a doubt, these guys do not speak Maxim/Dallas 1-Wire protocol; > it's its own thing. > > I am working on a microcontroller-based 1-Wire slave that uses an RHT03 > as the humidity/temperature sensor and it works great. I have not > deployed one of these yet so I am not sure how well the RHT03 will work > in a production environment (like in my garage, basement, or outside) > but at least in inside tests it is looking pretty good. > > I'd say these cheap sensors are a great option, but you definitely need > to hook them up to a microcontroller (it's not hard at all but it is not > typical PC development). > > Cheers, > > Eloy Paris.- > > P.S. There are Arduino libraries to talk to these sensors so using an > Arduino is an option if hardware development is not desired. The problem > would be getting the Arduino to behave like a Dallas 1-Wire slave, > though there is at least one GPL implementation out there that someone > could use as a starting point. > > ------------------------------------------------------------------------------ > Try before you buy = See our experts in action! > The most comprehensive online learning library for Microsoft developers > is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, > Metro Style Apps, more. Free future releases when you subscribe now! > http://p.sf.net/sfu/learndevnow-dev2 > _______________________________________________ > Owfs-developers mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/owfs-developers ------------------------------------------------------------------------------ Try before you buy = See our experts in action! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-dev2 _______________________________________________ Owfs-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/owfs-developers
