[talk] RTC on Beaglebone?

Isaac (.ike) Levy ike at blackskyresearch.net
Tue May 21 10:02:50 EDT 2019

Hi All,

FreeBSD or OpenBSD on ARM/embedded question:

I’ve got a timer project, and was wondering if anyone had experience with RTC and BeagleBone boards?

I don’t need a battery-backed RTC, I just need to keep good wall-clock time when the machine is on. (I think the beaglebone SOC has an RTC in there somewhere?)

I’ve found *one* post from someone tinkering with a BeagleBone and RTC on FreeBSD,

Last project I did like this, I used a PcEngines APU, because the on-board RTC/battery works without any fuss. For this project, I need to power this from a battery so a PcEngines board is way too much of a power hog...


Anyone have experience with other hardware/boards?
Thee project I’m doing needs:

- needs to run FreeBSD or OpenBSD
- needs to keep decent wall-clock time
- needs to have wifi (can do cheap/slow/weak USB plug type)
- needs to be powerful enough to run a *very basic* webserver and some light CGI (older beaglebone or rPi is totally punchy enough here)
- needs to have power specs similar to a beaglebone or RaspPi
- needs to have at least a hand full of GPIO pins
- Bonus: one or more i2c headers
- Bonus: hardware GPIO interrupts would be nice

I think a beaglebone is my best bet, but there are so many cool little boards out there (?)...


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