Signal strength through DBus interface

[a.brooks2 at marathon-targets.com]

Hi,

I'm trying to interface to wpa_supplicant through the DBus interface -- 
specifically I want to monitor the RSSI of my connection.
I can find the BSS that it's connected to and read the "Signal" 
property, so far so good.  But I notice that it updates only very slowly 
(whereas I can see it change in real-time using e.g. "/sbin/iw wlan0 
link").

Is this expected?  Is there a way to see the signal change faster 
through the DBus interface?


Thanks in advance,

Alex