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Re: [gpsd-users] heading info ?
From: |
Eric S. Raymond |
Subject: |
Re: [gpsd-users] heading info ? |
Date: |
Wed, 21 May 2014 05:55:39 -0400 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
Niall Parker <address@hidden>:
> Finally found a Garmin tech support person willing to work through
> the details, good news is that I can clearly see the heading output
> from my Oregon 450 ($HCHDG) when connected via USB in spanner mode.
Sorry for the belated reply, I've beenb eyebrow-deep in other projects.
> Steps done so far:
>
> 1. update to latest release (3.10, was 3.4 on Ubuntu 12.04).
> * Built from source after installing build-deps
> * scons check ran nominally without error (saw issue with shared
> memory invalid but saw in archives this is transient)
> 2. run ./gpsd -D 5 -N -n /dev/ttyUSB0, seems to work, xgps and gpspipe
> give basic position data
> 3. install to /usr/local etc.
> 4. basic operation (hotplug etc) working
> 5. gpsmon gives live data, recognized Garmin serial binary
> 6. tried gpscat -p /dev/ttyUSB0
> * noted this doesn't work with gpsd, correct ?
Correct.
> * initially got error on startup :
> * Traceback (most recent call last):
> File "/usr/local/bin/gpscat", line 15, in <module>
> BASELEVEL = sniffer.LOG_IO
> AttributeError: 'module' object has no attribute 'LOG_IO'
> 7. hacked sniffer.LOG_IO to be constant 5
>
That doesn't replicate here. Check your PYTHONPATH to see if you might
loading a stale version of the Python binding.
> 8. tried again ... no data output
>
> Does gpscat/gpsctl need to do something to convince the gps to start
> spitting out data ?
Not to my knowledge, but Garmins are weird. The fact that you see sentences
when running gpsd -D 5 -N -n /dev/ttyUSB suggests not. Look at the log from
that run; if it's shipping a ewlevant init string you should be able to see it.
--
<a href="http://www.catb.org/~esr/">Eric S. Raymond</a>
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