Re: [Paparazzi-devel] Xbee: AT or API mode? Channel select? Link established

[Marc Schwarzbach]

Hi Steffen

> Hi,
> 
> I switched from Wi232 to Xbee pro (2.4GHz) modules and have a  few
> questions now.
> 
> a) AT or API mode
> My first step was to simply switch from Wi232 to Xbee using AT mode,
> which works perfectly.
> But Xbee also offers the API mode. Are there any good reasons to use
> this mode?
> Pros and cons?

You can fly multiple aircraft at once in API mode...

> 
> b) Channel selection
> Has anyone experience with selecting the used channel in advance?

Xbee is not hopping, so you really select a channel. Can help to use other 
2.4GHz in parallel, e.g. FPV..

> 
> c) Link established
> I start GCS and the modem waits for the plane to establish the link. It
> takes a while, some seconds, from turning on the power until the link
> between plane and groundstation is established.
> Is this a normal behaviour? (AT mode, PAN ID set, Device IDs set in both
> modems)
> Once established it works fine.

For me, this is also normal behaviour.
This is not a modem but a system behaviour.

Cheers

Marc

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