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Re: [Paparazzi-devel] using

From: Luke Ionno
Subject: Re: [Paparazzi-devel] using
Date: Tue, 13 Sep 2011 18:14:53 -0400



I’ve actually done just what you’re talking about (a switching circuit) for the telemetry modem…  I used a MOSFET, with the gate attached to the AUX pin on the TWOG, which allowed the telemetry to be switched off (not on, obviously) via the GCS, by calling a flight-plan block.  (I used a flight plan stage timer to bring it back on after a set time.)  In your case, though, I think the easiest solution would be to connect the MOSFET gate to a dedicated PIC chip (or similar, a SMT version would be idea) programmed to take the gate pin low for a second or two every 5 minutes, to avoid having to tie the timer into the actual Paparazzi flight plan.


Be aware that people have reported problems with powering XBees up with data on the serial line in, though I’ve never experienced this personally.  (Apparently it can brick the XBee, requiring a reviving procedure to bring it back to life.)


Hope this helps!




From: address@hidden [mailto:address@hidden On Behalf Of limaiem imed
Sent: Tuesday, September 13, 2011 5:44 PM
To: address@hidden
Subject: [Paparazzi-devel] using


Hi all,

Who is using the Xbee 868 pro modules on paparazzi set-up and getting satisfying flying durations ?

Well, actually I am using those modules with minimal data link configuration files to fly a delta plane and I am getting 6 minutes data link time. This is not enough ...

I would like to know if it is technically possible to reset the XBee module each 5 minutes. I mean is it possible to ask the processor of paparazzi to turn off the power in the pins that are feeding the Xbee module ?

Otherwise, could we imagine a small electronic devise that perform resetting task ?

Anyway, those modules are really useless unless we can find a solution to the duty cycle issue !

Anyone can suggest me other modules ? (in the paparazzi wik,i there are a lot of information about telecommunication devise but are they up to date ?)

Thank you for your help


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