On Tue, Apr 10, 2012 at 1:35 PM, limaiem imed <
address@hidden> wrote:
> Hi,
> I am using the XBee PRO 868 MHz with the iridium.xml configuration file. I
> can get 45 minutes of data link.
> Someone can tell if it is possible to use an analogical output from the AP
> to re-set the Xbee module each 5 minutes by programming a kind of pulse ?
> (as discussed by Christophe De Wagter)
>
>
> <?xml version="1.0"?>
> <!DOCTYPE telemetry SYSTEM "telemetry.dtd">
> <telemetry>
> <process name="Ap">
> <mode name="default">
> <message name="ESTIMATOR" period="2." phase="0."/>
> <message name="NAVIGATION" period="2." phase="0."/>
> <message name="GPS" period="2." phase="0."/>
>
> <message name="ATTITUDE" period="4." phase="1"/>
> <message name="DL_VALUE" period="4." phase="3"/>
> <message name="WP_MOVED" period="4." phase="3"/>
>
> <message name="DESIRED" period="8." phase="1"/>
> <!-- Only one of the following is active at the same time: give them
> same time stamp -->
> <message name="SEGMENT" period="8." phase="5"/>
> <message name="CIRCLE" period="8." phase="5"/>
> <message name="SURVEY" period="8." phase="5"/>
>
> <message name="ALIVE" period="16." phase="1"/>
> <message name="BAT" period="16." phase="1"/>
> <message name="CALIBRATION" period="16." phase="1"/>
> <message name="DOWNLINK" period="16." phase="5"/>
> <message name="GPS_SOL" period="16." phase="5"/>
> <message name="NAVIGATION_REF" period="16." phase="9"/>
> <message name="PPRZ_MODE" period="16." phase="9"/>
> </mode>
> </process>
> <process name="Fbw">
> <mode name="default">
> <message name="FBW_STATUS" period="16." phase="13"/>
> <message name="COMMANDS" period="16." phase="13"/>
> <message name="ACTUATORS" period="16." phase="13"/>
> </mode>
> </process>
> </telemetry>
>
> Imed LIMAIEM
>
address@hidden
>
>
>
> On Tue, Apr 10, 2012 at 9:43 PM, Chris Wozny <
address@hidden> wrote:
>>
>> All,
>>
>> After spending a bit of time on the phone with some technical sales
>> reps at Digi, I've gotten a few answers:
>>
>> 1.) The XBee 868LP utilizes the G4 band which has an unrestricted duty
>> cycle, but only allows for 5 mW transmission. This is what I'll be
>> using.
>> 2.) Digi has got some new technology out called LBT + AFA (Listen
>> Before Talk and Adaptive Frequency Agility) which avoids the duty
>> cycle restriction by hopping frequencies every so often to keep in
>> line with EU regulations. I'm not sure if the XBee PRO-868 supports
>> this, but the XBee 868LP does.
>>
>> I believe that solution 2 would require using the XBee API, but would
>> allow the 868 MHz range to be used as nicely as 900 MHz in the US
>> which is awesome. Just wanted to share all of this info with everyone.
>>
>> Best,
>> Chris
>>
>> On Tue, Apr 10, 2012 at 10:07 AM, Chris Wozny <
address@hidden> wrote:
>> > After digging some more I found the sub band you were talking about.
>> > It's the 869.7-870.0 MHz G4 band. The only thing that worries me is
>> > that it can only transmit at 5 mW.
>> >
>> > - Chris
>> >
>> > On Tue, Apr 10, 2012 at 9:30 AM, Chris Wozny <
address@hidden> wrote:
>> >> Christophe,
>> >>
>> >> Do you know which sub bands can transmit 100% of the time? We really
>> >> only
>> >> need a couple kilometers which is probably an overestimate. Also, are
>> >> modules that work on this band drop in replacements? The XBee 868LP can
>> >> handle 865-870 MHz which makes me think it should be able to get on
>> >> this
>> >> less restrictive band via configuring the device.
>> >>
>> >> Best,
>> >> Chris
>> >>
>> >> On Apr 10, 2012, at 4:53 AM, Christophe De Wagter <
address@hidden>
>> >> wrote:
>> >>
>> >> The XBee 868 with their theoretical 40km range are not unusable. You
>> >> just
>> >> need to consider the consequences of it being really a long range
>> >> modem.
>> >>
>> >> There are some options to use them:
>> >>
>> >> 1) legal option: do not sent too much data, so others within the 40km
>> >> radius
>> >> can also use the frequency.
>> >> 1a) transmit less than 0.4 seconds every 4 seconds.
>> >> 1b) fly less than 6 minutes when sending 100% of time
>> >> 1c) in between: e.g. fly less than 12 minutes when sending 50% of
>> >> the
>> >> time.
>> >>
>> >> 2) illegal option: reset your modem every 5min with a xbee-reset module
>> >> and
>> >> you can send 9600 kilobits non-stop both ways.
>> >>
>> >> Note 1: when the modem in your airplane stops sending because it sent
>> >> too
>> >> much already, then it still works and can receive commands for
>> >> instance. It
>> >> will just wait until the hour passes until sending again as the duty
>> >> cycle
>> >> rule applies to full hours.
>> >> Note 2: also consider you can pick up data from others from quite far
>> >> away.
>> >> So make sure you program your unique ID's and safety codes for
>> >> instance.
>> >> Note 3: for shorter range there are also different sub-bands on 868
>> >> that can
>> >> send 100% of time.
>> >>
>> >> On Tuesday, April 10, 2012, Chris Wozny wrote:
>> >>>
>> >>> All,
>> >>>
>> >>> Due to EU regulations, we must use either 433 MHz, 868 MHz, 2.4 GHz
>> >>> for IMAV2012. I was wondering if there have been any developments with
>> >>> the 868 MHz band issues with Paparazzi or if it's still fairly
>> >>> unusable. Also, does anyone know of any 433 MHz transmitters tailored
>> >>> for AUTO2 outdoor flight? I'm curious as to why XBee doesn't make any
>> >>> 433 MHz modems...
>> >>>
>> >>> - Chris
>> >>> _______________________________________________
>> >>> Paparazzi-devel mailing list
>> >>>
address@hidden
>> >>>
https://lists.nongnu.org/mailman/listinfo/paparazzi-devel
>> >> --
>> >> -Christophe
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