Re: reading RSSI value

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On Mon, Jan 22, 2018 at 02:02:09PM -0500, Alexander Aring wrote:
> Hi,
> 
> 2018-01-21 12:59 GMT-05:00 Alexander Aring <alex.aring@xxxxxxxxx>:
> > Hi,
> >
> > 2018-01-21 7:24 GMT-05:00  <anton@xxxxxxxxxxx>:
> >> Hello
> >>
> >> Is it possible to somehow read RSSI (Received Signal Strength indicator) value for each ieee802154 frame
> >> received using raw socket? Quick grepping in kernel and wpan-tools sources says no, but just wanted to
> >
> > One note about raw sockets: you should use AF_PACKET RAW as socket type.
> >
> > The answer is no. A single RSSI value of a frame says nothing about
> > something... We want to collect them in kernelspace e.g. wireless
> > station dump and make some mapping from $NODE_ADDR (complicated
> > because short/extended mapping).
> > There exists some thesis branch on github which I did for my "thesis"
> > but not ready to bring upstream at all...
> >
> >> confirm. Could energy detection level value used instead? Also, is it possible to set transmitter power
> >
> > Also no energy detection and no LQI...
> >
> > Transmit power is possible (depends on driver support), but not per frame...
> >
> 
> got a new idea about to handle this per frame. Talked with one of the
> TC maintainers today... I think it would be nice to have a TC action
> where you can set a transmit power per classifier... not sure there
> exists many way how to handle it. Also there was an idea according to
> 6lowpan to handle it per ndisc entry. :-/
> 
> If you really want to set it per frame. 802.11 people might be
> interessted in the "wireless tx power TC action" as well...
> 
> - Alex


But changing transmit power is possible in runtime, isn't it?
I mean, without bringing interface down/up. Or not?
Is it supported by at86rf230 driver for at86rf212 chip? It seems that yes

Anton

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