Re: [Paparazzi-devel] datalink problem

[Dirk-Willem van Gulik]

On 4 Oct 2010, at 16:06, Ana García Álvarez wrote:

> Dear community, I have a problem with my autopilot(tiny v2.11), and don't 
> know how to solve it. 
> I have the XBee Pro 2.5 modems(2.4GHz). I have configured them with the X-CTU 
> sofware(baud rate to 57600, firmware: coordinator AT and end device AT, and 
> finally the two have the same Pan ID). 
> I use the transparent protocol(paparazzi). 
> The "downlink" is perfect. I can see the movement of my aircraft in the GCS, 
> the battery message, GPS info, throttle, all the messages look ok....but I 
> have no "datalink", or that's what I think. 
> Once I've launched a modem session, I get GPS fixed and stay in 
> "holding"...but I can't launch the aircraft, or change the mode via GCS. I 
> have launched the "datalink messages" and can see a "WIND" message sending 
> each 10seconds, but when I try to launch, a "BLOCK" appears in the "datalink 
> messages", but it isn't sent(I've been waiting for more than 
> 180seconds)...and there is no activity in the console of the GCS or in the 
> main paparazzi center one(nothing written like an error or so).
> Does anybody know what may happen?May I miss anything related to my 
> configuration settings, the software or so on?

A quick think to try is to short Tx & Rx on the airplane side; connect 'tip', 
'Hyperterm' or a similar terminal app to the station side - and then check if 
characters roundtrip - i.e. echo back - or if there is sporadic corruption.

Thanks,

Dw