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Re: [Paparazzi-devel] Multi tiered telemetry solution

From: Christophe De Wagter
Subject: Re: [Paparazzi-devel] Multi tiered telemetry solution
Date: Wed, 7 Mar 2012 08:45:16 +0100


I made ivy_serial_bridge to synchronize 2 laptops that were very far apart using the xbee868 modems that can bridge over 40km with the proper antennas but with very poor data rate. 


-all essential state info in a minimal binary message, I think 40 bytes or so
-for now the program configures the xbee modems (power level etc) but that might easily be changed to configure some GPRS modem. 


On Wed, Mar 7, 2012 at 2:10 AM, Tilman Baumann <address@hidden> wrote:
I was thinking along the same lines.
I just found stuff in sw/ground_segment/tmtc that looks like it's doing pretty much that actually. Have not fully grokked it yet ut looks cool.
Code from Christophe De Wagter.
Christophe I might have some questions later when I get to play around that stuff. ;)

On 6 Mar 2012, at 22:46, Chris Gough wrote:

Hi Tilman,

The way ardupilot does it, paparazzi should be able to do it too.  Single serial link to a Linux computer, then the Linux computer routes whatever messages over whatever links.

In ardu*, the AP talks MavLink to a MavProxy process on the Linux computer, and MavProxy has the features to route between multiple links. Another Linux computer running MavProxy puts it back together again on the ground side.

The Paparazzi equivalent might be some sort of routing agents spanning multiple ivy busses. I'm a bit hazy on details because I haven't tried it. MavProxy is python with a plugin architecture, maybe even a new ivy/paparazzi plugin could reuse the routing/link monitoring features...

Chris Gough

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