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Reading RSSI and LQI values from Z-Stack or TIMAC.
LQI (Link Quality Threshold) is a metric of the current quality of the received
signal RSSI (Received Signal Strength Indicator) is a signal strength
indication. It does not care about the "quality" or "correctness" of the signal.
LQI does not care about the actual signal strength, but the signal quality often
is linked to signal strength. This is because a strong signal is likely to be
less affected by noise and thus will be seen as "cleaner" or more "correct" by
the receiverThe linkQuality that is received at the higher layer is
simply the RSSI value (in dBm) after it has been scaled and offset. This is done
to get a value in the 0-255 range rather than the -40 to -95 range typical RSSI
values. The exact conversion operation is contained in the macro.
MAC_RADIO_CONVERT_RSSI_TO_LQI(x) that is defined in mac_radio_defs.h file. You
can reverse the above transformation to get the raw RSSI value in dBm.
Alternately, you can just use the linkQuality parameter directly since it is
only a linear function of the RSSI value.
do you know how to get the correlation value in CC2530??
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