Replies to This Discussion

Permalink Reply by Earl on April 24, 2012 at 11:57pm

still nothing on point to multi-point ???

Earl

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Permalink Reply by Jake Stew on April 25, 2012 at 12:18am

The radios will do multi-point just fine.  I have no idea if this is implemented yet or how long it might take.  I just got mine a few days ago.

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DeveloperPermalink Reply by Andrew Tridgell on April 25, 2012 at 6:06am

Hi Earl,

If you just want to receive at multiple places then you can do that, but if you want two-way comms between all 3 radios then things are a bit trickier.

If all you want is a extra receivers, then set the extra ones to have a DUTY_CYCLE of 0. That will stop it transmitting and it will get in TDM sync with whatever radio it can 'see'. It will work best if either the two ground stations can't see each other, or you use a single hopping channel. If both ground stations can see each other and you have multiple hopping frequencies then you'll get some loss as the TDM gets confused by the conflicting phase information from the other two radios.

If you want both ground stations to be able to send to the balloon then you can do it, but you will get some packet loss as they both try to talk at once. You can set a LBT_RSSI value so they "listen before talk", which will reduce the amount of interference a lot, but it still won't be ideal. Again, setting a single channel will work best.

We could add true N-way comms to the firmware, but I don't plan on doing that soon. If you want to do it yourself then grab the source tree and start coding! If you know some C coding then hopefully you'll get the hang of things.

Cheers, Tridge

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Permalink Reply by Herschel Boyd on April 25, 2012 at 2:39pm

I had thought about this very thing, but my scenario may be a little different.  I would look to do a hand off of the craft say as it reaches the limits of one gs, the next gs could pick it up.  Kind of like relay stations or repeaters.

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Permalink Reply by Axel Le Clézio on November 23, 2012 at 8:39am

N-way comms in firmware still isn't planned ?  Does anyone have put his hands in yet ?

Since standalone groundstations are available now, many people will want to use (or not) their laptop in addition to the regular groundstation without modifying anything in the setup.

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Permalink Reply by Helldesk on April 27, 2012 at 10:38am

There was an earlier discussion on this topic that you might want to check out here: http://diydrones.com/forum/topics/multiple-radios-on-the-same-netwo...

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