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Permalink Reply by Andrew Boos on March 1, 2012 at 11:58pm

Well, no replies but I have made a ton of progress! I wrote a simple app that allows me to send data over serial and it is working beautifully! Next step is to figure out how to send commands over the xbee to the ArduPilot

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Permalink Reply by James masterman on March 2, 2012 at 12:46am

Sounds good. I'd like to use my iPad for a ground station some day. It makes more sense than a laptop. I'll just need to wrestle it back off my kids.....

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Permalink Reply by ZacCom on March 2, 2012 at 9:11am

Good news I developing a app for iOS so we can use the regualar xbee shield and xbee to send receive data with each other. I am working with google earth to make it possible to set waypoints with the apm. Once I receive it in the mail. (First batch I hope) to do some testing with my bixler then with quad. This will elimatnate the laptop completely. If you have any questions or found a better exploit feel free to share. This will work with iPad 1, 2 and 3GS, 4, 4s. You will most likely will need iOS 5.0 to use this app once I publish it. It will be publish I tunes next month and Cydia to.

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Permalink Reply by Andrew Boos on March 2, 2012 at 9:56am

How are you planning on communicating with the xbee? The only way I can think of is through the serial pins of the iPhone and that requires root level access. You said that you were planning on publishing through iTunes, did you find another way to communicate with the xbee?

Anyways, I plan on buying an xbee pair within a few weeks and making sure I can communicate between the two. Then in a couple months when I get out for the summer and start my job i'll have enough money to buy the ardupilot and throw it in my rc plane. 

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Permalink Reply by ZacCom on March 2, 2012 at 10:32am

Right now I am using apple camera USB port and FireWire cable to arduino UNO to xbee 900 pro. I might do a pcb board or find a good off the shelf. So far no jailbreak has been used but I think I might have to later on waypoints and returning telemetry data. If Apple rejects the program since I am not changing anything in root I just send it Cydia only. Plans are still towards iTunes store. Data streams are funny with arduino but are easy to follow. I looking at the telemetry firmware with ardupilot and copter so waypoints and firmware loaded is the same so if you use ous device and computer at the same time you get same information of data. Sorry typing on iPhone.

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Permalink Reply by Andrew Boos on March 2, 2012 at 10:38am

This is my very simple application to send serial over the iPhone's 12 and 13 pins. The advantage of this method is that it would not require a separate microprocessor to send the serial data, instead the iPhone would do all the calculations and could even power the xbee.

Attachments:

• Iphone-Serial.zip, 30 KB

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Permalink Reply by Andrew Boos on March 2, 2012 at 10:40am

Also, since i don't have the ardupilot yet, i'm still fuzzy on how to xbee communication works. I know its serial but is there like a list of commands?

I did find this though:

http://diydrones.com/profiles/blogs/ardupilot-telemetry-protocol

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Permalink Reply by Don Brooks on March 2, 2012 at 11:25am

Assuming you will use the Mission Planner, all of the mavlink commands that are passed to and from the APM over xbee are dealt with behind the scenes.It's all point and click.

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Permalink Reply by Don Brooks on March 2, 2012 at 11:28am

my bad, i should haver read the initial post more attentively. There is a full list of mavlink protocol commands somewhere in the wiki: http://code.google.com/p/ardupilot-mega/

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Permalink Reply by Andrew Boos on March 2, 2012 at 12:01pm

Thank you very much!! Knowing that the protocol is called MAVlink saved me a ton of googling! I did find a MAVlink library that I will try to implement into my app ASAP.

Here is the library btw:http://qgroundcontrol.org/mavlink/start

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Permalink Reply by ZacCom on March 2, 2012 at 1:28pm

Re you using FTDI cable to iPhone only? If you can get that work then you might be able port mission planner mavlink.

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Permalink Reply by Andrew Boos on March 2, 2012 at 1:41pm

Kinda, but i had to write the "drivers" for the iPhone so that it can handle the UART serial data.

As you can see, I connect the "tx/rx" cables to the iPhone pinout along with the 3.3v and gnd. this allows me to communicate and power the arduino. I will eventually switch it for an xbee.

Also, have you gotten MAVlink to work on the arduino? I don't really understand the protocol at all.

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