title: Detecting exact frequency of Bluetooth signal
body: <p>I was wondering if there was a way that I could detect the exact frequency of a BLE signal with an iphone.  I know it will be in the 2.4 GHz range but i would like to know the difference down to the 1 Hz range between the transmitted frequency and the received frequency.  The difference would be caused by the doppler effect meaning that the central or the peripheral would have to be moving.  Also is there an exact frequency that iphones transmit BLE at or does it depend on the iphone's antenna? </p>