In the garden I have two Watermark 200SS with the HB soil-moisture board; after some calibration work I'm very happy with them for >2yrs now (leaving them in the soil during winter - IMHO a big feature!)
Regarding flower-pots I experimented around (quite a while ago); Havent taken the Watermark much into account as I found them too expensive, big and unhandy for this case monitoring dozens of pots. So I ended in capacitance level sensors measuring the water level on the bottom (not the soil-moisture!) being very easy to build (a teflon-isolated cable i.e.) and precise either - though needs calibration for every single pot! Ended 2010 suspending this till now as I wanted to get it wireless and battery-powered, but from my foundings back then I'd consider it the cheapest and most realistic, accurate way, a uC can measure the capacity of a (simple cable!) rather easy (maybe BAE091x now?) Implementing a simple calibration is the harder part, getting this onto owfs maybe the simpler one. If you google for "capacitance level sensors" there are quite some DIY-projects out there, it works really good, just needs some work ;) Michael P.S.: If you find something I'd be interested ;) ------------------------------------------------------------------------------ This SF email is sponsosred by: Try Windows Azure free for 90 days Click Here http://p.sf.net/sfu/sfd2d-msazure _______________________________________________ Owfs-developers mailing list Owfs-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/owfs-developers
