hi, On Mi, 2016-12-28 at 16:40 +0000, roger peppe wrote: > Hi, > > Not sure if this is the right place to ask this question - apologies > if not. > > I need a hardware RTC on my Raspberry Pi model B and I have > acquired one of these https://www.abelectronics.co.uk/p/52/RTC-Pi-Plu > s > > I'm running a reasonably recent version of Ubuntu Core with snappy > version 2.18.1. > > What's the best way of adding this to my Pi so that it gets the time > on bootstrap and keeps it in sync? The instructions I've found rely > on changing configuration files that are on the read-only filesystem, > such as /etc/init.d/hwclock.sh. I'd be happy to make a new snap > to do this if that's what's needed. > > Thanks for any pointers, >
i2c is enabled by default, you will likely have to edit
/boot/uboot/config.txt to additionally enable the i2c-rtc and ds1307
device trees, like:
dtoverlay=i2c-rtc,ds1307
on reboot i would expect the rtc-ds1307 module to be loaded
automatically and the hwclock boot job to set/get the hwclock time...
if you run into any issues with this, please make sure to file the
respective bugs.
i dont think anyone of us has yet used a battery driven rtc module to
actually verify it works, so your feedback will be very appreciated ...
ciao
oli
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