Re: [Paparazzi-devel] GSC --> A/P telemetry

[Gareth Roberts]

Hi Imed,

If flipping the modems around didn't solve the problem, the modems should  
be correctly configured for bi-directional transmission.
Which telemetry file are you using, as there are issues with xbee 868s  
related to regulatory demands - specifically, them switching off after 6  
minutes.
See http://paparazzi.enac.fr/wiki/868MHz_Issues

Have you checked your hardware connections between the modem & the  
autopilot, specifically the TX output of the xbee (RX on the UART)?  If  
this cable were not connected, you'd get the symptoms you describe.

Cheers,
Gareth

On Sun, 26 Feb 2012 18:31:34 -0000, limaiem imed <address@hidden> wrote:

> Hi all,
> my setup is:
>
>    - yapa2
>    - xbee868
>    - ublox
>    - IR Sensors
>
> I am compiling paparazzi with standard XML inputs:
> *- tunning_infrared.xml
> - iridium.xml*
>
> the telemetry is working fine from the A/P to the GSC during the fly
> however it does not work from the GSC to the A/P. For example, I wanted  
> to
> modify some PID parameters (p_gain) and so but nothing occurs when I  
> commit
> the changes from the GSC. In addition I can not change the A/P mode from
> the GSC. My question is the following, how can I debug this problem can I
> print some debug message to understand if it is a hardware or a software
> problem (I tried to switch the position of the modems but nothing  
> changed)?
> could this be a problem in the configuration of the modems ?
>
> thanks all.
>
> regards,
>
> regards,
>
>
> Imed LIMAIEM
> address@hidden