Denys Fedoryshchenko <nuclear...@nuclearcat.com> wrote: > On 2019-06-21 14:19, Niels Bakker wrote: > > > > Have you tried this? Because I have, and it's absolutely terrible. > > GPS doesn't give you the correct time, it's supposed to give you a > > good 1pps clock discipline against which you can measure your device's > > internal clock and adjust accordingly for drift due to it not being > > Cesium-based, influenced by room temperature etc. > > > > You're unlikely to get the 1pps signal across USB, and even then > > there'll likely be significant latencies in the USB stack compared to > > the serial interface that these setups traditionally use. > > I think it depends on recipe you are using. > Raspberry have low latency GPIO, and some receivers have 1pps output. > https://www.satsignal.eu/ntp/Raspberry-Pi-NTP.html
And there are tricks for avoiding temperature-related deviations :-) https://blog.ntpsec.org/2017/02/01/heat-it-up.html Tony. -- f.anthony.n.finch <d...@dotat.at> http://dotat.at/ defend the right to speak, write, worship, associate, and vote freely