Re: [Owfs-developers] unruly temperatures
Thanks, but I can hardly believe that the behaviour is caused by the power supply, a DS9490R USB to 1-Wire/iButton Adapter. The transitions in the different channels don't seem to be synchronous nor correlated. H Roberto Spadim skrev 2014-09-12 17:55: i think it's like a bad power supply or something like it - Roberto Spadim SPAEmpresarial Eng. Automação e Controle http://smeden.org/krypta/kryptera.html -- Want excitement? Manually upgrade your production database. When you want reliability, choose Perforce Perforce version control. Predictably reliable. http://pubads.g.doubleclick.net/gampad/clk?id=157508191iu=/4140/ostg.clktrk___ Owfs-developers mailing list Owfs-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/owfs-developers
Re: [Owfs-developers] unruly temperatures
Whats cable distance? Does it use parasite power? Em sábado, 13 de setembro de 2014, Håkan Elmqvist hak...@smeden.org escreveu: Thanks, but I can hardly believe that the behaviour is caused by the power supply, a DS9490R USB to 1-Wire/iButton Adapter. The transitions in the different channels don't seem to be synchronous nor correlated. H Roberto Spadim skrev 2014-09-12 17:55: i think it's like a bad power supply or something like it - Roberto Spadim SPAEmpresarial Eng. Automação e Controle http://smeden.org/krypta/kryptera.html -- Roberto Spadim SPAEmpresarial Eng. Automação e Controle -- Want excitement? Manually upgrade your production database. When you want reliability, choose Perforce Perforce version control. Predictably reliable. http://pubads.g.doubleclick.net/gampad/clk?id=157508191iu=/4140/ostg.clktrk___ Owfs-developers mailing list Owfs-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/owfs-developers
Re: [Owfs-developers] unruly temperatures
The installation is on a remote island and I can't physically access it for now. The server since about two months is a Raspberry Pi B+ connected to a wired network. For reliability reasons I have two DS9490s connected with a USB-hub powered by a 2 A supply. The Pi uses a separate 1 A supply. I use 0,5 mm^2 twisted pair telephone wires and soldered connections. The most important sensor, green trace, is connected with a 1,5 m cable to one of the adapters. The other two are connected to the other adapter with 3 and 10 m cables. The sensors use parasitic power. H Roberto Spadim skrev 2014-09-13 13:54: Whats cable distance? Does it use parasite power? -- Want excitement? Manually upgrade your production database. When you want reliability, choose Perforce Perforce version control. Predictably reliable. http://pubads.g.doubleclick.net/gampad/clk?id=157508191iu=/4140/ostg.clktrk___ Owfs-developers mailing list Owfs-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/owfs-developers
Re: [Owfs-developers] unruly temperatures
I would check, if the raw data, read from the owfs show that effect or if it gets introduced later. In any case it looks like a software bug to me - I could be wrong, but I don't think so ;o) Think about what changes you made since your last running system without the effect. Martin On 09/13/2014 02:34 PM, Håkan Elmqvist wrote: The installation is on a remote island and I can't physically access it for now. The server since about two months is a Raspberry Pi B+ connected to a wired network. For reliability reasons I have two DS9490s connected with a USB-hub powered by a 2 A supply. The Pi uses a separate 1 A supply. I use 0,5 mm^2 twisted pair telephone wires and soldered connections. The most important sensor, green trace, is connected with a 1,5 m cable to one of the adapters. The other two are connected to the other adapter with 3 and 10 m cables. The sensors use parasitic power. H Roberto Spadim skrev 2014-09-13 13:54: Whats cable distance? Does it use parasite power? -- Want excitement? Manually upgrade your production database. When you want reliability, choose Perforce Perforce version control. Predictably reliable. http://pubads.g.doubleclick.net/gampad/clk?id=157508191iu=/4140/ostg.clktrk ___ Owfs-developers mailing list Owfs-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/owfs-developers -- Want excitement? Manually upgrade your production database. When you want reliability, choose Perforce Perforce version control. Predictably reliable. http://pubads.g.doubleclick.net/gampad/clk?id=157508191iu=/4140/ostg.clktrk___ Owfs-developers mailing list Owfs-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/owfs-developers
