Thanks Jan for your support and the interest you are showing on my problem.
You pointed out the hardware and I agree. It's possible. But when you said: "Any devices can go missing if the bus is jumbled" I thought: how is that possible because I have separate buses. If it's short on one bus it cannot impact the others. But it was the starting point to think: what do the buses have in common? And the answer is: the ground. So what about if the ground connection is lost? No reference, it's floating. I checked my board and found that I have the ground going to the bus master and to all 1wire buses that was a not so good connection. You can see it in the photo I posted yesterday (posted here again for conveniance) http://gcolin.hd.free.fr/SystemDescriptionGujan/1Wire%20Chaudiere%20Gujan/RP I.jpg On the top left, blue screw connector is the 5V power supply, powering the Pi. 2 wires 5V and GND. On the side of this blue connector there is a black connector where 2 wires are connected. These 2 wires are 5V going to DS2482-800 bus master and GND for bus master + 1wire buses. These are only copper wires inserted in the black connector. BAD. Not very good. I did it in November 2013. I checked with a voltmeter and couldn't bring any evidence of poor connection. I pull back the wires and they were showing some oxidation. I don't know why I did these bad connections. Usualy I'm careful about such things. Because with time it can only become problem. Anyway today I've soldered it. ... Let's wait and see... So I haven't update to 3.1 I have downloaded the packages and I am ready but I don't want to change 2 things at once. Let see first what's coming from this connection re-made. Slowly, slowly, step by step. We want to find the culprit. Yes this is a Raspberry Pi 1 Model B Rev2 512MB It has always been upgraded to latest Raspbian until August last year. Jessie was not yet issued it's Wheezy. At this date I made the system fully read-only. Since then I don't want to do any upgrade. I want it to be a black box doing always same job, 24/7 and never change anything. I did this to avoid SD corruption (I had it after running 2 (3?) years) and to handle power off/on. RPI firmware is usually released with the upgrade (even if we can get the latest with rpi-update). I have always maintained my system with apt-get update apt-get upgrade So my firmware (including i2c) is from August last year. I'll keep posting here..... Thanks again and best regards -- Guy ------------------------------------------------------------------------------ What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic patterns at an interface-level. Reveals which users, apps, and protocols are consuming the most bandwidth. Provides multi-vendor support for NetFlow, J-Flow, sFlow and other flows. Make informed decisions using capacity planning reports. https://ad.doubleclick.net/ddm/clk/305295220;132659582;e _______________________________________________ Owfs-developers mailing list Owfs-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/owfs-developers
