and what is the range of rssi?
I got rssi from
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If I read that correctly, the RSSI isn't an absolute but a relative. Two access points can this be compared to determine which of the two has a "better" signal strength and hence is a better candidate for connection.There is no standardized relationship of any particular physical parameter to the RSSI reading. The 802.11 standard does not define any relationship between RSSI value and power level in milliwatts or decibels referenced to one milliwatt. Vendors and chipset makers provide their own accuracy, granularity, and range for the actual power (measured as milliwatts or decibels) and their range of RSSI values (from 0 to RSSI maximum).
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