spark/core-firmware — pull request #152 by timothybrown (2014-03-17 09:11:42+00:00)
Title: Added NetworkClass::RSSI

This function gives access to Relative Signal Strength Indicator (RSSI)
data from the CC3000’s scan table, which is refreshed every few
minutes. It returns signal strength in the range of -127 to 0 dB. Error Codes: 1 [CC3000 Error]; 2 [Timeout/No Data].