This is a good place to start: https://news.ycombinator.com/item?id=44145770 https://news.ycombinator.com/item?id=44145770 There is another project out there u

This is a good place to start: https://news.ycombinator.com/item?id=44145770 https://news.ycombinator.com/item?id=44145770 There is another project out there using a BeagleBone Black plus a small hardware RTC and a GPS module hooked up over GPIO/serial. The advantage there is that the BBB supports hardware PTP timestamping on its built-in NIC. I threw one together over a weekend, just need to design up a small box to hold it all in (though the cable mess of jumpers also made me want to design an interposer board to clean things up)