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Permalink Reply by Mike on February 1, 2009 at 8:56am

Noth666,
does the TechFX work with the 868 as I read on their website that that was part of a future package?

Mike

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Permalink Reply by Noth666 on February 1, 2009 at 10:18am

Not sure if XBee 868 works out of the box with TechFX, but the source is provided so I can rewrite it if needed. I mentioned I was going to use it to drex@thesiliconhorizon and he did not say anything about it not working. I think it has just not been tested yet, but I'll see once I actually get the gear - it is still in the mail now.
I'm a programmer and have done firmware rewrites like this before. I will need to do quite a bit of programming to add the features I want both to the firmware of the TechFX as well as the GCS software.

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Permalink Reply by Mike on February 1, 2009 at 11:10am

OK I understand. On their website they said the system was being updated to work with the 868 as well as some other features. I wasn't sure if this was purely a software upgrade or also the hardware - I have placed a message on their forum to try and find out.

Let me know how you get on...
Cheers,
Mike

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Permalink Reply by Matt Fisher on February 3, 2009 at 8:33am

I'm interested into what everyone thinks they can pack into a single 24 Kbps data connection. Can I get all my realtime flight data back to ground (ie, alt, speed, IMU info, GPS info) with a 3KBps data rate?

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Permalink Reply by Noth666 on February 3, 2009 at 1:47pm

@Matt: well that depends mostly on the required update rate, but provided it is low enough the simple answer is yes. It of course also depends how you send it, 3KBps = 3Kbit or 375 8 bit characters per second traffic(if the 3KBit still is affected by overhead this will be less), which to me sounds like quite a lot to send telemetry and IMU data in. But it also depends on exactly what IMU data and other data you want to send and how much detail you want in it.

I will be sending servo position commands for up to 8 channels, plus some other command data, and getting back attitude,altitude, speed, program feedback and IMU feedback, GPS data etc...
But most of it does not need to be updated very fast, and some will be more temporary and shift to and from the XBee channel.

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Permalink Reply by Matt Fisher on February 4, 2009 at 2:12pm

Thats pretty much what I had figured - Some rough math in my head seemed like I would only need about 150 or so 8bit chars/sec to do what I needed. Anyways - thats all I really needed to know to get the motivation to put a order in for one of these XBees thanks alot!

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Permalink Reply by Reto on February 5, 2009 at 6:27am

I do not know if people of DIYdrones operate in Switzerland or Liechenstein, but here is the technical approval of the Xbee Pro 868 for those two countries:

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Permalink Reply by Nick Sargeant on February 7, 2009 at 6:11am

I'm having trouble finding a distributor that would get this to Australia for a reasonable price.
Would anyone in the US be willing to forward this to me in Australia? I would cover delivery expenses of course.

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Permalink Reply by Genesis Factor on February 7, 2009 at 6:51am

geez, if i had the money...stupid school!!!

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Permalink Reply by Noth666 on February 7, 2009 at 5:16pm

Ugh apparently no dealer in the netherlands, so no XBee 868 package for me :-( so I will get the 2.4GHz one from sparkfun to at least test with I guess since my project relies on a XBee modem.
My TechFX with 6dof IMU has just arrived so...

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Permalink Reply by Reto on February 9, 2009 at 1:23am

Check out the Digi Europe online store. They sell the development kit for 89 Euro (+handling and shipping) and you can purchase with a major credit card. In the store, type "xbee 868" in the search box.

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Permalink Reply by dincer hepguler on February 9, 2009 at 7:01am

yes, the online europa store has the kit but they donot ship everywhere. i am in Turkey and they are not shipping to Turkey... :( i asked for a special shipping quote but they didnot respond until now... can anyone of our friends in USA do us a favor and organize this shipment? we can send money and he can order and forward a shipment to us... just for help... this kit is a real bargain and we donot want to miss this opportunity...

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