You line breaks are a mess. You gps is not getting any data, and thus pps cannot work. Your system needs
to get the approximate time ( to better than 1/4 of a second) from somewhere
else than PPS, since PPS give no information about the actual time. Just when
the turn of the second occurs. What is your chrony.conf file? How have you connected up gpsd? Is it seeing
the gps source?



William G. Unruh __| Canadian Institute for|____ Tel: +1(604)822-3273
Physics&Astronomy _|___ Advanced Research _|____ Fax: +1(604)822-5324
UBC, Vancouver,BC _|_ Program in Cosmology |____ un...@physics.ubc.ca
Canada V6T 1Z1 ____|____ and Gravity ______|_ www.theory.physics.ubc.ca/

On Fri, 2 Feb 2018, Charles Muggen wrote:

I have a Raspberry Pi Model 2 running Raspbian Jessie. Attached to the 
Raspberry Pi is a GPS HAT from Adafruit. I
think I have all the libs installed to get this to work, but for some reason I am getting 
question marks "?" when I
run chronyc sources.
The goal is to get accurate time with no internet connection. The only time 
source is the GPS HAT.
Status printouts below.
Any hints/suggestions on getting this to work are greatly appreciated.
Thank you.
 
chronyc sources
210 Number of sources = 2 MS Name/IP address         Stratum Poll Reach LastRx 
Last sample               
=============================================================================== 
#? GPS                          
0   4     0     -     +0ns[   +0ns] +/-    0ns #? PPS                           
0   4     0     -     +0ns[   +0ns]
+/-    0ns
 
chronyc tracking
Reference ID    : 7F7F0101 () Stratum         : 8 Ref time (UTC)  : Fri Feb 02 
17:23:28 2018 System time     :
0.000000004 seconds fast of NTP time Last offset     : +0.000000000 seconds RMS 
offset      : 0.000000000 seconds
Frequency       : 7.218 ppm fast Residual freq   : +0.000 ppm Skew            : 
0.000 ppm Root delay      :
0.000000000 seconds Root dispersion : 0.000000000 seconds Update interval : 0.0 
seconds Leap status     : Normal
 
systemctl status chronyd
● chronyd.service - NTP client/server    Loaded: loaded 
(/lib/systemd/system/chronyd.service; enabled)    Active:
active (running) since Fri 2018-02-02 00:18:07 UTC; 17h ago      Docs: 
man:chronyd(8)            man:chrony.conf(5)
 Main PID: 961 (chronyd)    CGroup: /system.slice/chronyd.service            
└─961 /usr/local/sbin/chronyd
 
 
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