[Xastir] Xastir and GPS

[Jon K Hellan]

On 05/02/2011 03:50 PM, Andrew Errington wrote:
> On Wed, 27 Apr 2011 23:04:59 Jason KG4WSV wrote:
>> On Wed, Apr 27, 2011 at 8:13 AM, Andrew Errington
>>
>> <a.errington at lancaster.ac.uk>  wrote:
>>> (instructions seem to assume you have a GPS connected to a radio or TNC).
>>
>> Not exactly.  Most GPS interfaces are of the "this is a standard NMEA
>> GPS variety".
>>
>> You see special instructions for the cases where the NMEA data from
>> the GPS is somehow interleaved or multiplexed with the APRS data.
>> Those scenarios require more explanation.
>>
>>> I have a Linux laptop with a USB soundcard and a USB GPS.  I have Xastir
>>> and soundmodem.  I want to configure Xastir to periodically send my
>>> current position (reported from the GPS) as an APRS packet via
>>> soundmodem.  How can I do this?
>>
>> First, configure soundmodem so you can send and receive.  This, in my
>> experience, is non-trivial.
>
> Ok.  Actually, it was trivial.  I recompiled soundmodem because I added a
> feature to use the GPIO on the USB sound chip as PTT.

Is this something that would be useful to other people? Are you willing 
to share the patch?

73
Jon LA4RT

>
>> Next, make sure your GPS can speak NMEA over a serial port.  Find the
>> name of that serial port (e.g. /dev/ttyUSB0 for a typical USB/RS232
>> adapter) and create a GPS interface in xastir.
>
> Thanks!  I created a new interface using gpsd.  Xastir chirped a few times,
> which seemed to be it sending a location packet[1].  Success!
>
> Incidentally, with gpsd the "View|GPS Status" menu option always tells me I
> have no satellites or that the GPS data is more than 30 seconds old.  Does
> this menu option only support directly connected GPS receivers?  Or should it
> work with gpsd-connected GPS?
>
> 73,
>
> Andrew
>
> [1] I am monitoring the sound card output.  I am not yet in a position to
> connect to another receiving statio.
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