Re: [chrony-users] Not getting time from gpsd

[Chris Greenman <chris.m.greenman@xxxxxxxxx>]

So how would i tell if my GPS does this and if so how do i get it recognized by the kernel and gpsd?

On Fri, Aug 12, 2016 at 2:53 PM, Bill Unruh <unruh@xxxxxxxxxxxxxx> wrote:

On Fri, 12 Aug 2016, Chris Greenman wrote:

it's a usb puck.  so no.  Actually I haven't actually looked but typical USB is +5v data+ data- and gnd.  As
far as I know the only place the pps signal is available is inside the puck between the GPS module and the usb
interface.  

Well, usb serial immitatiors can also immitate the control lines from a serial
line. Thus one of the usb packets can be a simlation of the PPS signalalong
the appropriate serial line.  But those are likely to have far worse behaviour than the actual lines.
It might however be better than the data phrases usually coming along the
serial line.

 like I said I COULD crack it open and run a new cable that included the pps line.

On Fri, Aug 12, 2016 at 2:24 PM, Bill Unruh <unruh@xxxxxxxxxxxxxx> wrote:


      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 |____ unruh@xxxxxxxxxxxxxx
      Canada V6T 1Z1 ____|____ and Gravity ______|_ www.theory.physics.ubc.ca/

      On Fri, 12 Aug 2016, Chris Greenman wrote:

            I CAN hook it up for PPS but it will require cracking open the puck and it's not that
            crucial for my use
            anyway.  


      Isn't there an output line from the puck which carries the PPS signal?