This looks like a much better solution given that this module is powered from 3v3.
Regards, John > On Jul 26, 2017, at 4:17 PM, Greg <soapy-sm...@comcast.net> wrote: > > Here is what I used: > > https://www.seeedstudio.com/Grove-High-Precision-RTC-p-2741.html > > I'm using the Greens so it conveniently plugs in to the Grove connector. The > lithium coin cell was not available at the local stores and I had to order > via Amazon. > This device uses 3.3V battery and it is plug-n-play with regards to the > hardware. The Beagleboard distributions include a driver for it. > > In addition to confusion with logic voltages, the Linux ecosystem for RTCs is > pretty confusing as well. The man pages have outdated or insufficient > information. > It was possible to get the RTC to work without touching the Device Tree. > > I've got the RTC to work and it is timing my irrigation control system > reasonably well. I'm still not confident with what I am doing with the > hwclock command. > I've documented what I did in the PDF file page 26: > > https://github.com/Greg-R/irrigate-control/tree/master/doc/latex > > Good luck with the RTC and please share you results here! > > Regards, > Greg > > > > -- > For more options, visit http://beagleboard.org/discuss > <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 > <mailto:beagleboard+unsubscr...@googlegroups.com>. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/95bd10e9-2888-4a21-baa0-d2df2536cc8f%40googlegroups.com > > <https://groups.google.com/d/msgid/beagleboard/95bd10e9-2888-4a21-baa0-d2df2536cc8f%40googlegroups.com?utm_medium=email&utm_source=footer>. > For more options, visit https://groups.google.com/d/optout > <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/C89CE6F5-D715-40D4-87DD-408F401A4A8A%40gmail.com. For more options, visit https://groups.google.com/d/optout.
