Re: nm_ap_get_strength question

On Wed, 2010-07-07 at 10:12 -0300, Franco Miceli wrote:
> I have a question about the method nm_ap_get_strength. The method
> reports values of 88 - 90 for signal levels of -50 dBm (as reported by
> iwlist sc).
> My question is, what does strength report?

A "percentage" of strength.

>  A quality measurement? If so, what is the math behind its
> calculation?

All the code lives in NetworkManager and is quite involved, as you can

> The reason I'm asking this is because while iwlist reports differences
> in signal level of 20 dB, strength reports differences of only 4 (unit
> missing).

It's a difference of 20dBm, not 20dB. The unit is percentages. The
percentage is used to present the quality of the link to users, and
shouldn't really be used for anything else.


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