HI Mark, So here: http://elinux.org/EBC_Exercise_31_Dallas_1-Wire#Reading_the_DS12B20
Shouldn't The *t=24437* is the temperature in C times 1000. Warm up the probe and see > what happens to the temp. > > Be: The *t=24437* is the temperature in C times .001. Warm up the probe and see > what happens to the temp. > ? I do like your courses though. Really easy for someone like me , who has yet had experience with one-wire devices. On Wed, Oct 26, 2016 at 7:23 AM, Mark A. Yoder <mark.a.yo...@gmail.com> wrote: > I've just posted[1] updated instructions on how to use Dallas 1-wire > devices on the Bone. I'm running: > bone$ *uname -a* > Linux yoder-debian-bone 4.4.21-ti-r47 #1 SMP Fri Sep 23 22:23:02 UTC 2016 > armv7l GNU/Linux > bone$ *cat /ID.txt* > BeagleBoard.org Debian Image 2016-08-28 > > The instructions show how to deconfigure P9_12 so the 1-wire driver can > run on it. > > --Mark > > [1] http://elinux.org/EBC_Exercise_31_Dallas_1-Wire > > On Sunday, January 19, 2014 at 8:42:49 PM UTC-5, godsf...@gmail.com wrote: >> >> Can you post a photo of how you have them wired please? >> >> On Wednesday, December 4, 2013 8:51:26 AM UTC-5, Doug Edey wrote: >>> >>> I've got 3 DS18B20 sensors on my bus at the moment, providing you've got >>> the sensors running in non-parasitic mode, I think you'll be fine. >>> >>> On Tuesday, December 3, 2013 8:13:31 PM UTC-5, lorena...@gmail.com >>> wrote: >>>> >>>> Thinking of replacing the dedicated microcontroller that runs my house >>>> with a BBB. Being able to read the existing 1-Wire network will be >>>> critical. Currently have 12 18B20 sensors on one bus, need more. Can the >>>> kernel module described here actually address and read multiple sensors on >>>> the same bus? Can it search and retrieve addresses from unknown sensors? >>>> >>>> I see people selling 8-port capes, as if maybe this is a simple one >>>> device per bus routine... Wouldn't help me! >>>> >>>> As for the "considerations" of long buses, yes there was a learning >>>> curve. I have both active pull-up and active pull-down, with careful >>>> source-end termination. All cable is CAT-5, and all sensors are within 1m >>>> of a single linear topology installation. In several cases the bus goes out >>>> one pair of the CAT-5 to a distant sensor and comes back on another pair of >>>> the same cable to continue to the next destination. Branching.in a star >>>> fashion is death to 1-Wire. My current system works, reliably controlling >>>> serious solar hot water and outdoor wood boiler operation that could blow >>>> off expensive antifreeze fluid (a huge hassle to recharge) if anything >>>> overheated. >>>> >>>> Great long-bus reference: >>>> http://www.1wire.org/Files/Articles/1-Wire-Design%20Guide%20v1.0.pdf >>>> >>> -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to beagleboard+unsubscr...@googlegroups.com. > To view this discussion on the web visit https://groups.google.com/d/ > msgid/beagleboard/6a937fdb-7316-48b0-8b84-543757958c8c%40googlegroups.com > <https://groups.google.com/d/msgid/beagleboard/6a937fdb-7316-48b0-8b84-543757958c8c%40googlegroups.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CALHSORoZHnv1PArG9zyCfV36esCb8T_%2BtJ-1zy7amx8TMOQocA%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
