The ArduCopter & ArduPilot Mega telemetry kit utilizes the Xbee Pro 2.4 GHz 63mw modules; this is the kit for use in the UK, EU and other parts of the world where the 900 MHz Xbee’s can’t be used due to mobile phones using the same frequency. 


This telemetry kit supports two way communication with the mission waypoint read and write functions in both Michael Oborne's Mission planner and HappyKillmore’s GCS on both the latest APM and ACM codes. This means no more USB cables & landings to connect the ArduPilot to a laptop in the field, you are able to view live telemetry data as your airframe progress through the mission, you can load a new mission on the fly while your UAV circles above you and execute that new mission without having to land! The range of operation has been tested out to half a mile with no loss in connection, connection has been found to drop off at 3/4 of a mile.


Included in the kit are all the items you need to have a fully functioning telemetry system:


  • 2 x Xbee Pro’s series 1 (1 x whip antenna 1 x RPSMA).
  • Ground and airframe adaptor boards (2 x XteamBee's).
  • Antenna (RPSMA High gain 4.9 dBi).
  • Connecting cables for both the GCS and airframe.  




The kits is available two forms:


Either as a pre soldered, fully programmed and tested kit, so they are completely plug and play or in a self built kit, for those of you who like to build your own. The kits are now in stock at www.buildyourowndrone.co.uk


The 2.4Ghz Pro series 2 Xbees (firmware XBP24-ZB, XBP24-B) do not work with the DIY Drones Xtreme Bee boards. Please use Sparkfun Xbee explorer boards.




Build the Xtream Bee’s:


The XtreamBee boards need to be built, this involves some soldering and is not complicated if you are experienced with soldering, however a word of warning here, when soldering the female headers, don’t use too much solder! The male pins of the Xbee modules will not fit into the female headers if any excess solder runs down inside the holes on the PCB, it will fill the female headers with solder, this is not good!


When the soldering of the female header connections is complete you will have to solder the connection pins for the FTDI / telemetry cable to the APM and the computer. To enable the to way communication in the GCS’s you will need to hold the CTS line high, this is done with a solder bridge from the VIN line to CTS line. This modification is required on both XtreamBee boards with FTDI connectors, it is not needed with the USB GCS XtreamBee board now supplied in the kit.


When you have completed the construction of the XtreamBee boards set both slide switches to master mode, you can now add the first Xbee module to the XtreamBee, you will see that there is an white outline of the Xbee on the board for orientation, please ensure you select the correct orientation to save the XBee unit from being damaged!


Before adding any power to the board make sure that the Antenna on the RPSMA Xbee is attached and screwed all the way on, powering the unit without the antenna being fitted or incorrectly fitted will cause the unit to fail!
Install the Xbee’s and Program:


When the Xbee is fitted to the XtreamBee and the antenna has been connected power the first board using the supplied FTDI cable, note the orientation of the lead colours (see image above), the black wire needs to go to the pin marked “BLK” on the top side of the board or “GND” on the underside. If this is placed correctly you cannot get the other connections incorrect! 
The Xbee’s come set at a data rate of 9600, this needs to be changed to the higher rate of 57600. To do this you will need to use a free program called X-CTU


Down Load Here:


In "PC Settings" select the comport that the XBee is connected to, then go to the tab marked "Modem Configuration". Always select the update firmware option, click "Read", change the rate in the box shown above and then click "Write".


When you have changed the rate on the first board, remove the first Xtream Bee and switch over with the other, program the second one in the same way and to the same rate as the first.


The set up of the Xbee’s are now completed!
Adding the Telemetry to APM:


On the APM you will see that there is a total of four connection ports marked "Teleport", (if you don't have the male pins to solder to the teleport for fitting the telemetry cable they can be found here) which will need to be connected to the airframe part of the telemetry kit. There are two pins for the power and two for the communication. Once again if you look at the XtreamBee you will see there is a “5v+”, “GND”, “In” and “OUT”. With the supplied APM telemetry cable you will find one end has 4 connections and the other has 5, the 4 goes onto the APM and 5 onto the XtreamBee, match the two ends to the corresponding pins and the APM is ready to send telemetry data to the GCS.



How to get the data:


To start using the telemetry, power the APM first which will power the airframe Xbee, power the GCS Xbee second, then load the Mission Planner or HK’s GCS select the correct comport and speed (57600) and click connect. You will now have your telemetry up and running!


Always select disconnect in the GCS before removing power from either of the units, I have found that on odd occasions if you just unplug one unit / switch the power off without disconnecting in the GCS you can lock a unit, this is easy to solve by reprogramming the XBee again, but to avoid it reverse the connection process.





Use of 2.4 GHz Radio and Telemetry together:


This kit has been tested both in the field and in a lab environment to check for any clashes or interference between the RX/TX of the radio equipment operating on the same frequency as the Xbee’s, no conflicts have been found to exist.

The Xbee units on power up look at the frequencies available in the channel they have assigned, they will then select the one which has the least amount of noise, this is called DSSS in the world of Xbee’s, the DSSS operates in a very similar way to that of the 2.4 GHz radios with frequency hopping, which means we can fly more than one aircraft at a time and still use the same 2.4 GHz band as the pilot standing right next to us.


The field tests conducted were first with the radio on “range Check” which is a very low power setting, the Xbee was set to full power and placed on top of the RX and APM, the TX was taken to the minimum recommended distance and some way beyond, at which point there was still a solid lock and smooth operation of all the connected servos.

The second field test was conducted in a wide open space, where once again the Xbee was set to full power and was left on top of the APM and RX, the TX was in normal “flight Power” mode and was taken to approx 1.3 miles away with line of sight, there was no loss of connection to the servos, they still operated as if there was not a telemetry kit working right next to the RX.

The radio I used throughout all of the field testing was a Futaba T7C, I have also released three full test kits to customers to try with additional radio equipment, all non Futaba, some of the radios tested were $60 specials while others were top end systems, all tests conducted have proven to be successful with no loss in control at any time and easy to use telemetry from the box.


While no concerns or issues have been identified with the telemetry kit and the radio systems when tested in the field or lab, it's highly recommend that a “range check” be carried out before committing to flight, if you can maintain a solid RX / TX lock at lowered powers on the ground beyond the minimum distance recommended then flight should not be an issue.







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  • Hi Martin

    Finally got my 2.4 Xbees working.
    Can you please add in the post above if possible the following about The series 2 2.4ghz Xbees.
    The 2.4Ghz Pro series 2 Xbees (firmware XBP24-ZB, XBP24-B)do not work with the DIY Drones Xtreme Bee boards.
    I just received two Sparkfun Xbee explorer boards and the telemetry is working 100s now.
    I can read and write over xbees now perfectly.

  • Distributor

    You are welcome John,


    if you get stuck be sure to let me know or have a word with Johann down in SA, he runs the drone store down there for all your local Ardu supplies. I talk with him most days so either one of us should be able to get you up and running :)






  • Thanks Martin


    That sounds good. Im getting a pair of xbee explorer boards, If that does not sort out my issue the Ive got a pair of series 12.4  xbees on hold for me with the agents in South Africa.


    Thanks for clearing that up for me.




  • Distributor

    Hi John,


    In short, Mission planner and HK connect and will load and read way points without issue. Happy to give you a demo over the web if you have or want to get teamviewer.


    Any questions please feel free to mail me directly martin@buildyourowndrone.co.uk







  • Hi Martint

    I am using the XBPro 2.4 Bsit. This Xbee can not be set with the XBP24 802.15.4 firmware.
    I can receive data in HK but have a problem connecting through Mission planner.
    Does the XBP24 firmware on the XB pro 2.4 series 1 allow you to connect, read and write mission plans and change setting through mission planner.

    My Xbees with all the available firmware flashes does not allow me to connect through mission planner. I keep getting time outs on getperam when connecting mission planner.

    If your XBP24 firmware works and can read and write in mission planner then I need to order some of them for myself.

    Please advise if you can connect in mission planner with out timeouts

  • Distributor

    Hello Paul/ Richard,


    If the units seem to be corrupted the easy way to go about bring them back to life is in the X-CTU program, if you go to the tab for setting the modem configuration, tick the always up date firmware.

    Select the modem in the first drop down window (XBP24) in the next window over select XBee Pro 802.15.4 and in the last window select the 10E6 as the version. Click on write and it should restore the modem back to 9600, go to the PC Setings tab and select the rate as 9600, then reconfigure to the correct rate as in the instructions. If this fails to work, use all the same settings as above but use the restore option then the write option as listed above, if it will not connet please check both the 9600 and the 57600 rates in the PC Settings tab.


    If both of these options fail, please email me directly, I can and do offer one to one support on all products from my store :)








  • hey richard how do you enter this mode? i just received my yesterday, and for most part i got it to work, however when it drops connection (and it did a few times, more so at the level calibration stage of apm) i find it hard to get it to connect to mission planner again - it might be a mission planner bug, ac2 bug or xbee, but i doubt xbee because i can still access it via the x-ctu software. im using turnigy 9x/frsky 2.4g

  • I haven't range tested this yet but it seems to work fine with my Spectrum 2.4GHz radio kit. I did have trouble pairing the two XBees as one of them seemed to have got corrupted. Eventually I discovered you can reset to factory defaults by doing the following:

    (Enter command mode on the Xbee)
    You: +++
    XBee: OK

    (Reset to factory defaults)
    You: ATRE
    XBee: OK

    (Sets baud rate to 57600)
    You: ATBD6
    XBee: OK

    (Save your settings to firmware)
    You: ATWR
    XBee: OK
  • Distributor
    Hello Stephen,

    Thank you for sharing the information, I will have a look at sourcing a few of the leads you have given a link to, I think it's fantastic that there are other applications that can benefit from the kit.


  • Distributor
    Hello Björn,

    Great to hear you and the telemetry kit are getting along well, the soldered "jumper" does not look right, agreed you could mistake it for a mistake..... however I like to think my soldering skills have not let me down before and I hope they will not any time soon! :)

    I've not tested more than one at a time, so I'm unsure, however I have set aside some time tomorrow and will try the two into one option and see what happens...... what's the worst that can happen.... :)


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