Yes that is effectively what I do. My system controls my solar heating so it is important that it keeps going, so I have been looking at ways to make it more fault tolerant. One thing I am working on it to double up on the important sensors, DS18X20's are only about £1 each so it doesn't cost much, I am also running them on a separate CAT5 backbone for them where possible, isn't hindsight wonderful:) I then have the option to use the average, discard 85's, alarm if the difference is greater than whatever.
I will be moving it to a Raspberry Pi shortly and I am considering having the second set of sensors on a second Pi with cross monitoring to see if the other one is still up, compare values etc. The problem with this line of thought is how far to take it. To be effective the Pi's need to be powered from different fuses in the main distribution board, or run from a UPS. But then in the end it all drives valves and pumps via I/O modules, which cannot be duplicated. Nothing is perfect is it:) On 14/07/13 04:10, Daniel MacKay wrote: > Wow Jerry, what a comprehensive and coherent answer. Thank you so much. > > I think I'll take your strategy of just discarding all 85.000 values - at the > data collection point I'll turn them into a "U" undef which will propagate up > in the software to a missing value. > > -dan > ------------------------------------------------------------------------------ > See everything from the browser to the database with AppDynamics > Get end-to-end visibility with application monitoring from AppDynamics > Isolate bottlenecks and diagnose root cause in seconds. > Start your free trial of AppDynamics Pro today! > http://pubads.g.doubleclick.net/gampad/clk?id=48808831&iu=/4140/ostg.clktrk > _______________________________________________ > Owfs-developers mailing list > Owfs-developers@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/owfs-developers ------------------------------------------------------------------------------ See everything from the browser to the database with AppDynamics Get end-to-end visibility with application monitoring from AppDynamics Isolate bottlenecks and diagnose root cause in seconds. Start your free trial of AppDynamics Pro today! http://pubads.g.doubleclick.net/gampad/clk?id=48808831&iu=/4140/ostg.clktrk _______________________________________________ Owfs-developers mailing list Owfs-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/owfs-developers
