Iv'e been trying to get the RSSI value of a router using the ESP8266 WiFi module. I have also tried the CC3000 WiFi breakout board from Adafruit but i'm struggling to solely to get the RSSI. I know the wifi.h library has a function to get the RSSI value from a router but I can't seem to get my head around how to use this library with the ESP8266 or the CC3000. Do I need the official WiFi shield from arduino? If so, can anyone post a link to the exact one please. Thanks very much for your help.