Re: First attempt GPSD/PPS ->NTP time server

Rob van der Putten <rob@xxxxxxx> writes:

Hi there


root wrote:

No GPS NMEA should not do that. The length of the sentence is almost fixed
length, so the timing on it should vary by perhaps a few msec, as you found,
certainly not by seconds. It sounds like you have troubles.

You could try using minicom ( assuming you are on Linux) to look at the output
on the serial port.

....
My Garmin was sending to much data, sending a NMEA sentence once per
second. So I put '$PGRMO,,4<CR><LF>' in a file and send it to the Garmin.
Now it's at six lines per second; GPRMC, GPGGA, GPGSA and three GPGSV
lines (plus one PGRMT per minute).


This is confusing. You first say that one NMEA sentence pers second is too
much data, and then that youarranged that it sent 6 sentences per second.
Note that only one sentence ( which should take about 140ms at 4800Bd) is
allo you need.

.