I try to use GPS module with usb as NTP server by :
server 127.127.28.0 noselect
fudge 127.127.28.0 time1 0.035 refid GPS
server 127.127.28.1 prefer noselect
fudge 127.127.28.1 refid PPS
and start gpsd with :
gpsd -n -D 5 /dev/ttyUSB0
but it only has gps value and no PPS value (my device support pps). and this value has a few mileseconds delay. Dose anyone know how to get high accuracy time or pps time from my GPS module?
server 127.127.28.0 noselect
fudge 127.127.28.0 time1 0.035 refid GPS
server 127.127.28.1 prefer noselect
fudge 127.127.28.1 refid PPS
and start gpsd with :
gpsd -n -D 5 /dev/ttyUSB0
but it only has gps value and no PPS value (my device support pps). and this value has a few mileseconds delay. Dose anyone know how to get high accuracy time or pps time from my GPS module?