[Owfs-developers] unruly temperatures revisited
I noticed that one of my systems (Raspberry Pi B+, Owfs 2.9p8) behaved very well without any anomalous temperature jumps. So I uninstalled the Owfs 2.9p5 running on the misbehaving systems, updated, upgraded and installed Owfs 2.9p8. After this all measurements were ok without any jumps and the problem is resolved. After reversing the procedure (uninstalling Owfs 2.9p8 and reinstalling Owfs 2.9p5 on an otherwise updated and upgraded Pi) the jumps were back. So my conclusion is that there may be some little bug in Owfs 2.9p5. If someone is interested in looking closer at this I still have an SD-disk image to share. H -- Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=157005751iu=/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've had the same when i left the power pin disconnected (ds18b20), now i connect it to ground. Nico Martin Patzak (GMX) wrote: 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 -- 0623391101 -- 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
Well, I guess then it is NOT a software bug then... ;o) It for sure looked like one... Would be interesting to understand why it results in this weird behaviour! Cheers, Martin On 09/14/2014 06:25 PM, Nico Bouthoorn wrote: I've had the same when i left the power pin disconnected (ds18b20), now i connect it to ground. Nico Martin Patzak (GMX) wrote: 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 -- 0623391101 -- 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
Re: [Owfs-developers] unruly temperatures
Hello! Normally I would say one thing, Of course it does, I arranged it., but under the circumstances, there are a lot of reasons why its doing that. Besides it was arranged that way. Seriously? Lots of reasons, look for an open line someplace. - Gregg C Levine gregg.drw...@gmail.com This signature fought the Time Wars, time and again. On Sun, Sep 14, 2014 at 12:48 PM, Martin Patzak (GMX) martin.pat...@gmx.de wrote: Well, I guess then it is NOT a software bug then... ;o) It for sure looked like one... Would be interesting to understand why it results in this weird behaviour! Cheers, Martin On 09/14/2014 06:25 PM, Nico Bouthoorn wrote: I've had the same when i left the power pin disconnected (ds18b20), now i connect it to ground. Nico Martin Patzak (GMX) wrote: 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 mm2 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 -- 0623391101 -- 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 -- 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 - Vol 100, Issue 6
Hakan, I had an episode (on a BBB with I2C connection) where for a couple of weeks the temperature resolution would randomly drop from 12-bit to 1/2 degree C. Looking at the owserver presentation of all of the various bit resolutions, sometimes the lower resolutions were not proper representations of the higher-bit values. I couldn't tell if some values were delayed, or just plain offset, but depending on which resolution happened to get written into my filesystem where my logger reads them, the temperature could appear to jump by 1/2 degree. I verified that the values in the filesystem files were being logged correctly. It would happen for a few minutes or a few hours, and then fix itself. And then without me doing anything at all, it just stopped happening! Looking at your graph, it appears you usually get full resolution gradual changes on either side of your 1/2 degree steps. My graphs were always more like the later part of your blue line - chattering by 1/2 degree where there should have been a smooth transition. I have no clues why this started or stopped... | Loren Amelang | lo...@pacific.net | On Saturday, September 13, 2014 at 10:29 PM, owfs-developers-requ...@lists.sourceforge.net wrote: 1. unruly temperatures (H?kan Elmqvist) -- Message: 1 Date: Fri, 12 Sep 2014 17:18:53 +0200 From: H?kan Elmqvist hak...@smeden.org Subject: [Owfs-developers] unruly temperatures To: OWFS (One-wire file system) discussion and help owfs-developers@lists.sourceforge.net Message-ID: 54130edd.5070...@smeden.org Content-Type: text/plain; charset=iso-8859-1 Suddenly my temperature readings have started to jump up and down about 0.5 degree C at infrequent but random points of time. See: http://smeden.org/jumps.jpg (the green trace is the temperature of my watermaker, the blue sea- and the red outdoor-temperature) I have had this system since 2005 but not seen this behaviour before. Today I am using owfs 2.9p5. The sensors are a mix of old and new ones. Has anyone seen this behaviour? Is there any explanation? -- 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
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
[Owfs-developers] unruly temperatures
Suddenly my temperature readings have started to jump up and down about 0.5 degree C at infrequent but random points of time. See: http://smeden.org/jumps.jpg (the green trace is the temperature of my watermaker, the blue sea- and the red outdoor-temperature) I have had this system since 2005 but not seen this behaviour before. Today I am using owfs 2.9p5. The sensors are a mix of old and new ones. Has anyone seen this behaviour? Is there any explanation? Thanks in advance H -- Håkan Elmqvist Sunnerdahlsv 7 167 62 Bromma Telefon: +46 (8) 80 18 81, +46 (704) 56 74 81, +46 (176) 84 077 epost: hak...@smeden.org Kryptera mera! 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
i think it's like a bad power supply or something like it 2014-09-12 12:18 GMT-03:00 Håkan Elmqvist hak...@smeden.org: Suddenly my temperature readings have started to jump up and down about 0.5 degree C at infrequent but random points of time. See: http://smeden.org/jumps.jpg (the green trace is the temperature of my watermaker, the blue sea- and the red outdoor-temperature) I have had this system since 2005 but not seen this behaviour before. Today I am using owfs 2.9p5. The sensors are a mix of old and new ones. Has anyone seen this behaviour? Is there any explanation? Thanks in advance H -- Håkan Elmqvist Sunnerdahlsv 7 167 62 Bromma Telefon: +46 (8) 80 18 81, +46 (704) 56 74 81, +46 (176) 84 077 epost: hak...@smeden.org Kryptera mera! 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 -- 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
