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
<[email protected]> 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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