Re: gpsd Example2.py

[Dirk Beer]

Gary,

In case it's helpful, this is what I got when running interactively:

python3
>>> import gps
>>> session = gps.gps(mode=gps.WATCH_ENABLE)
>>> session.read()
0
>>> gps.MODE_SET
1024
>>> session.valid
33895930
>>> gps.MODE_SET & session.valid
1024
>>> session.fix.mode
3
>>> gps.TIME_SET
4
>>> session.valid
33895930
>>> gps.TIME_SET & session.valid
0
>>> session.fix.time
'2022-09-22T04:37:13.000Z'

Cheers,
Dirk


Sent with Proton Mail secure email.

------- Original Message -------
On Wednesday, September 21st, 2022 at 5:55 PM, Gary E. Miller <gem@rellim.com> 
wrote:


> Yo Dirk!
> 
> On Wed, 21 Sep 2022 06:34:57 +0000
> Dirk Beer rdbeer@pm.me wrote:
> 
> > root@pheromone:~# python3 example2.py
> > Mode: 3D(3) Time: n/a Lat 32.729173 Lon -116.993810
> > Mode: 3D(3) Time: n/a Lat 32.729174 Lon -116.993811
> > Mode: 3D(3) Time: n/a Lat 32.729174 Lon -116.993811
> > Mode: 3D(3) Time: n/a Lat 32.729170 Lon -116.993812
> > Mode: 3D(3) Time: n/a Lat 32.729170 Lon -116.993812
> > Mode: 3D(3) Time: n/a Lat 32.729169 Lon -116.993813
> > Mode: 3D(3) Time: n/a Lat 32.729169 Lon -116.993813
> 
> 
> FYI, here is what I get from a ZED-F9P:
> 
> dilbert ~ # python www/example2.py.txt
> Mode: 3D(3) Time: 2022-09-22T00:21:22.000Z Lat 44.068815 Lon -121.314050
> Mode: 3D(3) Time: 2022-09-22T00:21:23.000Z Lat 44.068815 Lon -121.314050
> Mode: 3D(3) Time: 2022-09-22T00:21:24.000Z Lat 44.068814 Lon -121.314050
> Mode: 3D(3) Time: 2022-09-22T00:21:25.000Z Lat 44.068814 Lon -121.314050
> Mode: 3D(3) Time: 2022-09-22T00:21:26.000Z Lat 44.068814 Lon -121.314050
> Mode: 3D(3) Time: 2022-09-22T00:21:27.000Z Lat 44.068814 Lon -121.314050
> Mode: 3D(3) Time: 2022-09-22T00:21:28.000Z Lat 44.068814 Lon -121.314049
> Mode: 3D(3) Time: 2022-09-22T00:21:29.000Z Lat 44.068814 Lon -121.314049
> 
> Here is the relevant example code:
> 
> while 0 == session.read():
> if not (gps.MODE_SET & session.valid):
> # not useful, probably not a TPV message
> continue
> 
> print('Mode: %s(%d) Time: ' %
> (("Invalid", "NO_FIX", "2D", "3D")[session.fix.mode],
> session.fix.mode), end="")
> # print time, if we have it
> if gps.TIME_SET & session.valid:
> print(session.fix.time, end="")
> else:
> print('n/a', end="")
> 
> It reads a JSON message. Checks that we have a TPV message. If we
> have a TPV, it prints the mode, then if we have time, it prints that or
> "n/a".
> 
> Simple.
> 
> BTW, check that you only have ONE copy of gpsd, and its python modules
> installized. Mixing disto gpsd, and git gpsd, leads to odd failures.
> 
> RGDS
> GARY
> ---------------------------------------------------------------------------
> Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
> gem@rellim.com Tel:+1 541 382 8588
> 
> Veritas liberabit vos. -- Quid est veritas?
> "If you can't measure it, you can't improve it." - Lord Kelvin