Replies to This Discussion

Permalink Reply by Rob Haines on July 24, 2012 at 4:34pm

Im using these on 868mhz. Ive not managed to get my Y6 out of range.....yet!

I hear the 3DR radios on 433mhz are excellent and the config is builtin to the MP

Personally i wouldnt touch xbee with the current offerings available unless you had some xbee gear already.

DeveloperPermalink Reply by Randy on July 24, 2012 at 6:13pm

Yes. I agree with Rob.

I use an Xbee but that's because I bought it a long time ago.  If I were to buy something now I'd go for one of the 3DR radios that has native mavlink support.  There are two different frequencies available..i forget which is for which country..

https://store.diydrones.com/3DR_RadioTelemetry_Kit_915_Mhz_p/kt-tel...

https://store.diydrones.com/3DR_RadioTelemetry_Kit_433Mhz_p/kt-tele...

Permalink Reply by Rob Haines on July 25, 2012 at 1:28am

In the UK we need the 433Mhz units. 900mhz is used for the 3G mobile network so OFCOM would throw the book at you if caught.

DistributorPermalink Reply by Martint BuildYourOwnDrone.co.uk on July 27, 2012 at 10:50pm

"In the UK we need the 433Mhz units. 900mhz is used for the 3G mobile network so OFCOM would throw the book at you if caught."

Rob, I'm not sure where you have gotten your information from, however if you get caught selling / importing or using the 3DR radios (433 MHz) in the UK the "Book" will still find its way over to where you are. You might find this thread a good read; there are a few of us working towards the "fix":

http://www.diydrones.com/forum/topics/regulatory-compliance-for-the...

Until the "Fix" is in place you might as well use another system that gives better range than the 3DR radios, as breaking the law with one or another system is still breaking the law :(

That's the only reason you will not find the 3DR radios in my store, I stock just about everything (almost a mirror image) that the 3DR store in the States has less these radios! I did ask the guys at 3DR to make a note on the store to warn users here and in the EU that they are not legal to use as they have not been certified..........

Regards

Martin.

Permalink Reply by Alan on July 28, 2012 at 2:51am

Unless of course you hold a Radio Amature licence which allows you to use the 430 - 435Mhz Band and your kit is exempt from CE markings. I have imported some, built the kit by soldering parts and using them under my full Amateur Radio Licence on 431 -432 Mhz all mode digital communication.

Excluded from the scope of the R&TTED (see Annex I of the R&TTED) are:

Radio Kits, when assembled resulting in radio equipment operating in frequency bands allocated to the Amateur Radio Service.

 

DistributorPermalink Reply by Martint BuildYourOwnDrone.co.uk on July 28, 2012 at 3:46am

Is it easy to get one of these radio licences Alan? Or do you need to sit exams etc?

Regards

Martin

Permalink Reply by Alan on July 28, 2012 at 4:09am

Hi Martin

When I took mine it was quite hard and included sending and receiving Morse Code and a theory exam. Now it is much easier. There are different levels and the Foundation Licence is fairly easy with I think 25 multiple choice questions and some practical work. I think this is sufficient to operate the 3DR radios but you would need to check the rsgb.org website. If you look at www.firstpersonview.co.uk you will see that you must have a radio amateur licence to operate some of the Tx equiment they sell.

Regards

Alan

DistributorPermalink Reply by Martint BuildYourOwnDrone.co.uk on July 28, 2012 at 2:54pm

Thanks for the information Alan, another plan / option dead in the water there then!

How are you you getting on with the radios?

 

Regards

 

Martin.

Permalink Reply by Alan on July 28, 2012 at 3:42pm

Hi Martin

The 3DR radios work very well. I haven't had chance to fly with them but I have been doing some ground tests and I am quite impressed. I have some basic equipment such as signal generator, RF probe and Scope so I will give them a check whilst connected to the APM2 to comply with my licence but would not be sufficient for CE.

I still think CE testing would be fairly straight forward in that both HopeRF and SilLabs have test data on line. 3DR must have carried out testing and if only they would supply this Data then it would be 95% done. They are battery operated so no real safety issues with regards to mains voltage. A test for EMC and immunity from interference should be all that is needed.

Regards

Alan

 

Permalink Reply by Darren Stan Oakley on July 24, 2012 at 11:40pm

Thanks for the replys
I was going to go for the 3dr ones but can't seem to get a reply from 3drobotics about a supplier in the uk or if they can ship them direct. They do seem the best option and cheaper too.

3D RoboticsPermalink Reply by Chris Anderson on July 24, 2012 at 11:43pm

There is a list of UK suppliers in the tab above. We don't know what inventory each stocks, I'm afraid. Please visit their sites to check. 

Yes, 3DR ships direct to the UK. Was that not clear from the checkout process?

Permalink Reply by Darren Stan Oakley on July 24, 2012 at 11:46pm

To be honest I didn't get that far Chris. I thought I would just check first though. Will prob order direct in that case.

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