On Fri, Mar 29, 2013 at 08:39:26PM -0400, Jim Duda wrote: > On 03/28/2013 11:17 PM, Guy COLIN wrote: > > Hi, > > > > I would suggest to go step by step to discriminate the faulty equipment: > > Disconnect everything just keep the 6 channel hub connected to the serial > > link, > > have it running for some time you should see only the master on the owfs > > tree > > and if you still have the short circuit it's the faulty. > > But most probably it won't. > > Yes, I pretty much did what you described. All of my one-wire stuff goes > through a set of punch down blocks to get to Cat5 wiring to the rooms. > I found 1 flaky run which needed a repunch. > > By measuring voltages, I found one device that was just acting bizarre, > so, I swapped it out. I couldn't get a solid voltage reading. After > swapping out with a new DS18S20, I got a solid 5V reading. > > I don't have a scope. I'm just using a DVM across DQ/GND. I assume this > is the proper measuring technique. > > On all of the temperature devices which hang off of the main/aux ports, > I measure a good solid 5V.
This may not be a direct answer to your question, but I had been looking at this: http://www.hobby-boards.com/store/products/1%252dWire-Sniffer.html This might help you see what the signal looks like and whether it's marginal or half garbled down your line. Marc -- "A mouse is a device used to point at the xterm you want to type in" - A.S.R. Microsoft is to operating systems .... .... what McDonalds is to gourmet cooking Home page: http://marc.merlins.org/ ------------------------------------------------------------------------------ Own the Future-Intel(R) Level Up Game Demo Contest 2013 Rise to greatness in Intel's independent game demo contest. Compete for recognition, cash, and the chance to get your game on Steam. $5K grand prize plus 10 genre and skill prizes. Submit your demo by 6/6/13. http://altfarm.mediaplex.com/ad/ck/12124-176961-30367-2 _______________________________________________ Owfs-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/owfs-developers
