Hello all, I am doing some research involving wifi localization (think GPS with wifi access points). I have done some initial testing, but I still have a few questions about the hardware:
"iwlist wlan1 scan" dumps the access points in range of the antenna, and it includes a "Quality" (XX/70) and a "Signal level" (-XX dBm) ratings. What do these correspond to on the hardware? Is there a way to get the signal strength and noise level for a given AP?
Does the hardware cache the results of the last scan for a certain amount of time? I have collected data continuously, but the data is very flat with a few steps (link). This indicates that something is caching the results of the scan - whether it be the hardware, kernel driver, or iwlist.
Any help or insight you can afford me is greatly appreciated!