Hi Dominick,
ardrone_brown lets you do that. You just have to "rosservice call /ardrone/togglecam" to toggle between the two cameras. 
You can go to http://code.google.com/p/brown-ros-pkg/ to get more info. Also, it helps to have the latest firmware on your drone.
Best!
Arjun.



On Mon, Oct 10, 2011 at 11:15 AM, Dominick Vanthienen <dominick.vanthienen@mech.kuleuven.be> wrote:
Hi everyone,

I'm looking for a AR.Drone driver which can give me the data of the downward-facing camera.
I see that there are two packages: ardrone and ardrone_brown. The latter containing a topic for the forward-facing camera.
Does anyone have experience with adapting one of these to have the downward-facing camera data?
Or, did anyone write some code for it, and is willing to share it?

Thanks a lot!

Nick
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