> On May 2, 2016, at 9:51 AM, jimlux <jim...@earthlink.net> wrote: > > > The real question is whether "cron" is timely enough. No matter, just write > a script (or python) that reads time in a loop (and you can put a sleep in > there) and pulses the GPIO when needed. >
A Raspberry Pi with nothing else on its plate will have a cron-to-shell script latency easily under 100 ms, possibly under 10. If it were me and I were triggering a relay for some sort of external circuit, I’d probably be happy it was on the right side of 500 ms. If I cared more than that, then step 1 would be to do as others have suggested and come up with a microcontroller + GPS solution instead of NTP + cron. Ironically, that’d be around the same price (albeit more engineering work). _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
