Date: Sun, 3 Jul 2022 12:55:11 -0500 From: Bakul Shah <bakul@iitbombay.org> To: John Kennedy <warlock@phouka.net> Cc: David Cornejo <dave@dogwood.com>, freebsd-arm@freebsd.org Subject: Re: RPI4 + ntpdate + unbound Message-ID: <B25C3F1F-BEAC-44FB-8C37-804ACFD44D7F@iitbombay.org> In-Reply-To: <YsG6/tFzMG74jvT2@phouka1.phouka.net> References: <Yr/DPWc9Y%2Brp0J78@phouka1.phouka.net> <CAFnjQbuLQJJ9Y1wvGPB7kEeAts_WZXTj7T0ZU5o8TP9NvcKUGg@mail.gmail.com> <YsG6/tFzMG74jvT2@phouka1.phouka.net>
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> On Jul 3, 2022, at 10:51 AM, John Kennedy <warlock@phouka.net> wrote: > > On Fri, Jul 01, 2022 at 10:49:33PM -1000, David Cornejo wrote: >> I always hated this about the RPIs - I put a DS3231 on mine and the >> problem disappears. ... > > Yeah. Not sure where Eben would cram it (much less the battery), but > one of these days his form factor needs to expand a bit. But with what > I do with the RPI4 it runs hot, so I've got a good passive case, but > this one hides the GPIO pins entirely and the active-cooling one I'm > looking at is a big chunk of aluminum + fans, which means some pretty > significant risers/headers to get it to clear the heatsink and some > contention with the PWR/GRD pins to power the fan. > > Haven't dug into what RTC driver FreeBSD may support to see where I > can stick the RTC. I do want one, just not seeing options that jump out > at me. A USB based GPS/GNSS dongle can be had for about $10. It will use up one USB port + more power + its antenna needs to be near a window but this might be the easiest way to get realtime on a Pi with no exposed GPIO pins. You may even be able to run as a stratum-1 NTP server!
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