Hello, I'm back. I have been testing for 18 days now. And IT IS OK! Well let's be careful up to now it is ok. So my problem was these bad connections. During 18 days my script was reading every 10 seconds the 8 Onewire devices on the buses. My counter reports approximately 114000 checks x8 devices So far I have only 65 "out of range" errors :-) But still 3 owread "ServerRead: Data error" :-( Anyway this is an error rate of 0.007% . So I can live with that.
My conclusions are: -1 as suggested by others I'm going to write an "error tolerant" script. In case of error I'll use the previous value. Because my goal is just to have no "holes" or wrong values in my graph. And I log every 5 minutes only. -2 I still hesitate to totaly give up with "owfs /mnt/1wire fuse file system" and use owread instead. I think I'll do it for the reading values (temperatures, humidities) but I'll keep fuse file system for the writings (PIO). Just because my current scripts use it. -3 I'll stick with 2.8p15. Except if there are obvious good reasons to update 3.1 As said previously my system is full read only and I want it to be a black box running 24/7 and never update anything. It is doing the job. Side note about the "out of range" errors temperature = 85°C I did some tests on an arduino connected to a DS18B20 and the official arduino 1wire software available here: http://playground.arduino.cc/Learning/OneWire This program requests a temp conversion to the 1wire sensor, waits 750ms, reads the result in the scratchpad. I noticed that if I reduced the 750ms to a lower value at some point I read 85°C. Exactly on testing on the breadboard at 591ms I get a good value at 590ms I get 85°C. Of course anything lower than 590ms will give 85°C. So what about if sometimes a temp sensor on the 1wire bus takes a little more time than usual? More than owserver is waiting? Is this possible? In this case we'll read 85°C... No? Is it correct? Best regards -- Guy ------------------------------------------------------------------------------ Attend Shape: An AT&T Tech Expo July 15-16. Meet us at AT&T Park in San Francisco, CA to explore cutting-edge tech and listen to tech luminaries present their vision of the future. This family event has something for everyone, including kids. Get more information and register today. http://sdm.link/attshape _______________________________________________ Owfs-developers mailing list Owfs-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/owfs-developers
