Replies to This Discussion

Permalink Reply by Vincent Mees on January 26, 2012 at 2:47pm

Nice find.

And these can be used with the same interface boards as the Xbee?

• ▶ Reply

Permalink Reply by Karsten on January 26, 2012 at 3:23pm

yes :-)

for the 57600 baud you must set packet sie @ 140

• ▶ Reply

Permalink Reply by Alex on January 26, 2012 at 2:50pm

What frequency do you use? Because i've saw that you can change between several frequencies.  Can you tell me what exactly do you bought and in which quantity ?  Thank you.

• ▶ Reply

DistributorPermalink Reply by Martint BuildYourOwnDrone.co.uk on January 26, 2012 at 3:04pm

Hi Karsten,

 

What range have you been getting with these units, and on which MHz are you running them at?

Do they have the duty cycle on the 868 MHz setting which kills the Xbee 868's for use here in the EU?

I will stay with the 2.4 GHz Telemetry kits which are known to work well and have full EU certification, I can't see how these will work with the APM 2 I guess we will see what the other people say about them.

 

Regards

 

Martin.

www.buildyourowndrone.co.uk

 

 

• ▶ Reply

Permalink Reply by Karsten on January 26, 2012 at 3:20pm

868,3 MHz

Test from England :

openmicros.org/index.php/component/kunena/7-communications-and-protocols/60-achieving-34km-with-default-xrf-antennas?Itemid=0

• ▶ Reply

Permalink Reply by Javier Robaina on January 26, 2012 at 3:04pm

been any evidence of achievement of these modules?

Powers that are sold?

Good news, greetings.

• ▶ Reply

Permalink Reply by Karsten on January 26, 2012 at 3:09pm

exactly the same as XBee.


I use as a frequency of 868.3 MHz.

I've bought two xrf and two active xbbo (1 set for apm and 1 set on the PC with serial cable)

• ▶ Reply

DistributorPermalink Reply by Martint BuildYourOwnDrone.co.uk on January 26, 2012 at 3:30pm

Hi Karsten,

 

So are these units legal / illegal for use in the UK & EU then? The reason I ask is, that I think they offer oustanding value for the features and range, but after spending weeks looking into the 868 band and spending a good sum of money, they were useless as there is a requirement for the "duty cycle" :(, I have another 868 option sitting here on my desk right now, its more expensive however they make these units look like they are very short on range, but are illegal to operate here in the EU, and that's why they are not being sold for telemetry use right now.

 

So do these units have the "duty cycle"?

 

Regards

 

Martin

www.buildyourowndrone.co.uk

• ▶ Reply

Permalink Reply by Karsten on January 26, 2012 at 3:52pm

In Germany, 868 for audio and alarm systems generally approved as ISM. and of course only as a short range. more I can say it either. The modules can also be operated at 433 and the ISM but is also approved for home use.

www.bundesnetzagentur.de/cln_1911/DE/Sachgebiete/Telekommunikation/...

• ▶ Reply

Permalink Reply by Emiliano Fortunati on February 6, 2012 at 4:21pm

Hi Karsten,

 

I'm trying two XRF modules,

When I try to connect APM it start to get param list but do not complete the operation.

In the debug windows I've a lot of crc errors.

I've, like you suggested, setup the packet size to 140.

Do I've to setup any other parameter in XCM? Sleep, Flow Control, Radio data rate?

 

I'm using a standard 57.6 firmware setting, and with the original Xbee module it work fine.

 

THANKS a lot!

• ▶ Reply

Permalink Reply by Emiliano Fortunati on April 5, 2012 at 12:53am

Hi Jason, I've a similar situation.

 

After many tests, I've found a good configuration with low packet loss.

The main problem is that these devices work in a different mode from Xbee and I've found the problem in the internal conversion from "cable to RF".

I've abtained a lot of info from ciseco support forum, they has sent to me a new firmware for a better conversion.

 

But for me is too unstable so I've abandoned this produtc.

BYE!

 

• ▶ Reply