Re: Help needed to configure and compile gpsd to run on a Raspberry Pi 4 and NOT use systemd

[Frank Nicholas]

Hello Greg,

My responses were in reply to the statement that you do not need to use gpsd to 
use PPS with chrony, that chrony can use PPS directly.  That’s why I asked 
where do you get the time that the PPS signal is indicating…

Thanks,
Frank

> On Nov 13, 2024, at 12:38 PM, Greg Troxel <gdt@lexort.com> wrote:
> 
> Frank Nicholas <frank@nicholasfamilycentral.com> writes:
> 
>> Exactly - does crony read this directly?  If not, how does the system know 
>> which time the “0”/start of the second is from?
>> 
>> How can you trust PPS, without knowing what date/time the PPS is relative to?
> 
> ntpd can read NMEA.
> 
> But, there are receivers supported by gpsd that are not NMEA enough for
> ntpd to be ok with them.
>