Sorry if I wasn't clear!
If the duty cycle is the problem, increasing the baud rate of either
paparazzi or the modems will not help, at best it'll just stretch the
time until they stop working to maybe 10 minutes. There is basically
nothing you can do to fix this. The XBee needs to only transmit 10% of
it's time. Paparazzi telemetry is a continuous stream of messages, and
so it won't work with the 868's (unless you do something like resetting
them every few minutes).
As for the 1mW thing, you are right, I talked to Digi live chat a while
back and the chap definitely recommended that (said I'd get a few miles
@ 1mW as well) until he found out I was trying to stream data, at which
point he said it wouldn't work at all.
The idea about connecting the boards is very cunning, and should work
(although you will need a common ground as well). I would recommend a
serial cable though, I don't have an FTDI one, I use a Brainstem (though
any 3V tolerant TTL level convertor will work), a power supply made from
an LM78 and paperclips, a dodgy old USB->Serial adapter and a spare
molex connector and some loose wires to connect to the paparazzi. Not
that I'm on a budget or anything...If you are at a university or large
org, it's exactly the kind of stuff someone will have in a cupboard
somewhere.
As for the GCS view, if you are wondering whether it's your GCS or
modem, go Tools -> Messages. If you get a tiny window you can't see,
and it doesn't fill with tabs that flash green, you're problem is
outside the computer.
As I said originally, I bought a pair of 868's, but they just don't work
(at least not without the reset hack). Certainly while you are
starting, try and get a set of XBee Pro 2.4GHz (they even play ok with
video with some fiddling, I promise).
--G
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