> So, im trying to understand what you are doing. You want to put a
> wireless router in your airplane, and connect both your gumstix and
> presumably a laptop to this router?
The main goal is a wifi datalink between plane and ground.
The wireless AP in the plane act like a wifi card with an aditional lot of
output power (enabled if necesary),
At ground, another Wireless AP to connect a laptop and/or a PDA to send and
receive data to/from the plane.
> Unless there is some pressing
> reason, it would seem to me that putting a wireless router/AP in the UAV
> would be heavy and use lots of electrical power.
Yes, this is an inconvenient,
but i'm use a plane with ~2kg payload.
for smaller planes, the AP can be replaced by a small wifi usb dongle or an
wifistix, and use very cheap directional antenna at ground, guided by gps
> I guess im not sure
> why you want to connect two things together wireless when they are
> pretty close to each other, wouldn't it be more efficient to connect
> them with wires?
yes, the AP is wired to gumstix via a short ethernet cable.
They are interferences between wifi 2.4 Ghz and gps antenna 1.5 Ghz, but one
will be placed above an the other below the plane and use an isolation
material between both,
It need to be tested.
Some guy's have succesfully integrated a video downlink at 2,4Ghz ~800mW and
GPS without major problems.
1. Easy to add an IP Cam, connected to the AP in the plane, then it use the
same datalink for data and video (at poor quality and time shifted). all
software already done for streaming video,
2. Easy to connect many planes to same ground station without need of
aditional transmiter nor aditional software, just a different IP for each
3. Easy to share data between each plane.
4. Simple and common UDP data transfer for all things
5. Relatively large bandwith ~1Mbps
6. Minimize use of gumstix cpu in the plane, to allow it to do some more
interesant work while flying, like hard image processing,
7. Low price datalink
8. With a high resolution digital cam, it can download snapshots to the ground
station when datalink is available, without need a landing, just an ftp/sftp
command and continues flying.
9. Many equipments now integrate wifi/IP technologies, like pda's,
smartphones, cam's, etc. this contribute to reuse the same equipment for
hobby, home and job, minimizing the cost.(if don't crash)
10. Many other dreams to enjoy... just need imagination ...and time