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Re: [Paparazzi-devel] Communications through serial port

From: Felix Ruess
Subject: Re: [Paparazzi-devel] Communications through serial port
Date: Wed, 19 Sep 2012 00:10:31 +0200

Hi Jorge,

you don't have to change anything in the airframe file (as long as you are using the transparent mode)...
Just make sure the baud rate that you set on the ground side in the Paparazzi center matches the baudrate you set in the airframe file.
(default 57600 baud).

I guess it would be easier if you could point to what you tried already and where exactly it didn't work...

Cheers, Felix

On Tue, Sep 18, 2012 at 11:32 PM, Jorge Pantoja <address@hidden> wrote:
Hello Felix,
Thank you for your answer, my answer is below.
Best Regards,

On Tue, Sep 18, 2012 at 12:46 PM, Felix Ruess <address@hidden> wrote:
Hi Jorge,

1) Is there anyone that can help us with the configuration needed on the airframe file so that the paparazzi communicates to the ground station through a serial port?
Does anyone has a working airframe file that uses direct communication through serial port?

Not quite sure what you mean by "direct communication through serial port". A serial cable instead of wireless xbees for testing on the ground?
Yes, we would like to use a serial cable instead of the wireless Xbees. Do you think you can send me a simple airframe file that uses serial communication instead of the Xbees?
2) I know that there is a way to connect the paparazzi directly to the computer without using the Xbees. How can you do that?

Just plug a cable (mind the 3.3V) instead of your xbees... e.g.

In that case you should make sure that you use the "transparent" and not the "xbee_api" protocol.
Thank you, we will try this option but we already tried it once. I will get back to you if we have any questions about this.
3) How can I change the COM ports that the Paparazzi uses to communicate? What are the options available?

On the ground segment side? Yes, thank you we did this but our ground station still appears black and doesn't display any information from the autopilot.
Just pass the appropriate device to the link agent with the "-d <device>" option.
e.g. default is usually
  sw/ground_segment/tmtc/link -d /dev/ttyUSB0

Hope this helps.. I'm afraid I didn't fully understand where exactly your problems are..

Cheers, Felix

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