[PATCH 2/2] wpa_gui-qt4: tray icon based signal strength meter

Jouni Malinen j at w1.fi
Sat Feb 21 09:53:00 EST 2015

On Sat, Feb 21, 2015 at 03:06:49PM +0100, Arkadiusz (Arkq) Bokowy wrote:
> Thanks for the replay, I will definitely use this SIGNAL_POLL command -
> I wasn't aware of the licence incompatibility with iwlib and that the
> interface has been deprecated.
> Anyway, I've tracked a little bit this command in the wpa_suplicant
> drivers code, however I was unable to determine if the returned value
> for RSSI is unified - e.g. it is guaranteed, that the value is in range
> from -100 to 0 (or any arbitrary range) or if it is a raw value from
> the chipset. Because according to the Wiki (and part of the iwlib)
> various chipsets might operate on different scales (e.g. DBM, RCPI).

This depends a bit on the user driver interface. With nl80211,
SIGNAL_PLL uses NL80211_STA_INFO_SIGNAL which is defined to use dBm.
With WEXT, I would not really trust any value without separately
checking with each driver..

Jouni Malinen                                            PGP id EFC895FA

More information about the HostAP mailing list