Re: [Paparazzi-devel] Xbee 868 uplink

[VCordes]

          Gautier,

did you test the Pro868 in the meantime?

I can confirm Jeremy´s results.


Regards
Volker







Hi,
 The bandwidth of a 868MHz modem is much smaller than the one of a  2.4GHz. If you use the same telemetry file, the result can be an  overloading of the downlink that will prevent the uplink to work very  well. Removing some of the messages or at least increasing their sending  period could solve your problem. I should be able to test this new modem  next week I hope.
 
Gautier
        
 Jeremy MICHEL a écrit :
> Hello,
>         
>  I am trying to use the new Xbee pro 868 MHz.
>  Downlink works well however I couldn't get the Uplink working reliably.
>  Sometimes I succeed in live changing aircraft's settings by multiple  fast double-clicks... Not user friendly...
>  
>  Datalink is configured in transparent mode which worked well with  Aerocomm modems.
>  
>  The code I used in "my_airframe".xml in order to configure the datalink:
>  ...
>  <section name="DATALINK" prefix="DATALINK_">
>     <define name="DEVICE_TYPE" value="PPRZ"/>
>     <define name="DEVICE_ADDRESS" value="...."/>
>  </section>
>  ...
>  ...
>  ap.CFLAGS += -DDOWNLINK -DUSE_UART0 -DDOWNLINK_TRANSPORT=PprzTransport  -DDOWNLINK_FBW_DEVICE=Uart0 -DDOWNLINK_AP_DEVICE=Uart0  -DPPRZ_UART=Uart0 -DDATALINK=PPRZ -DUART0_BAUD=B57600
>  ap.srcs += downlink.c $(SRC_ARCH)/uart_hw.c datalink.c pprz_transport.c
>  ...
>  
> Any help is welcome,
>         
> Jeremy
>         
>
>         
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