Comment by Grizouille on May 6, 2011 at 7:51am

Why not , but you have this http://www.digi.com/pdf/ds_xbeepro868.pdf

The Xbee pro in 868 Mhz

Comment by Jim on May 6, 2011 at 7:55am

I would assume that being a Digi 868 product, that still suffers from the firmware enforced 10% duty cycle.
Jim

Comment by Grizouille on May 6, 2011 at 8:20am

I think that it has to free by the parameter setting................If somebody made it ?????

Comment by Johann Van Niekerk on May 6, 2011 at 8:29am

Been there done that....wait no longer doable!

 

Martin and myself has exhausted the DIGI 868 option and it wont work. Jim I would like to see someone test it I will be the first to buy.!

 

Regards

Johann Van Niekerk

www.AriDrones.com

Moderator Comment by Wouter van Verre on May 6, 2011 at 9:34am

Perhaps this device could be an option as well? It's based on the RFM12B chipset and works in the 868Mhz band.

It was recommended to me a little while ago, but haven't had a chance to check it out yet.

Comment by mquintilian on May 6, 2011 at 10:32am

anybody tried this http://www.seeedstudio.com/depot/twig-serial-rf-pro-p-794.html?cPat... Its a drop in replacement for the xbee and has 1KM  range, only $24

Distributor Comment by Martint BuildYourOwnDrone.co.uk on May 6, 2011 at 11:56am

The EU telemetry issue has been rolling on for some time now, I know of ways to work around the duty cycle on the 868s, it's not pretty, and may cause issues with the units freezing. The other downside to the "hack" is the length of time the units will put up with being used in that manner.
To that end I've placed an order for some 2.4 xbees to see if these will work and if they do should offer s range of about 1 mile. Both Johann and myself have been looking for a solution to this issue for a while now, I hope that there is some light starting to show at the tunnels end. I spoke to Chris a week or so back about using the 2.4 xbees, there is a modification which needs to be done to make them work, I have an understanding of what needs to be carried out, and I hope that we can all enjoy a little of the telemetry goodness this side of the pond some day soon!

Regards

Martin

www.buildyourowndrone.co.uk

Comment by I.S. on May 6, 2011 at 1:05pm

BTW how bad is transmitter and telemetry working at 2.4GHz at the same time.

In the past, it was a bad idea for sure, but nowadays how well 2.4G XBees and FHSS&DSSS transmitters interact?

Comment by Jim on May 6, 2011 at 1:33pm

Martin, i'm just getting a bit fed up with digi, perhaps its time to look at their competition. 2.4ghz is never going to be the best solution for any of us, 868mHz is what we should be using to retain parity with our american cousins and free ourselves from the fear of interfernce with our control systems (imaginary or not).

Good luck with the trials, I guess running at 2.4 is better than no telemetry at all!
Jim

Comment by Johann Van Niekerk on May 6, 2011 at 1:42pm

Hi Jim

I understand your point of view but what you also must understand is that with new radio's cones we problems that the APM deb team hadn't taken into account and why will they if the biggest part of the community is running on xbee's ?.... This will prove specially problematic to Martin and myself as well are looking for alternatives to retail in our store and still provide the same funcunality. For me specifically in South Africa the. 868 band has also been made illegal for civilian use so my only to really options would be 2,4 and 433.92. So that's why we are pushing towards the 2,4 ghz units and not other brands until we know they supported by diydrones Dev team.

Regards
Johann

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