Is "HCI_Read_Rssi" is the only option to get RSSI value from "Non-discoverable" Device?

Dear all,

         I am trying to develop bluetooth positioning system. I am at the point of successfully getting the RSSI value using the Inquiry_result_with_rssi with no problem.
However, as the security is concerned, I do not want leave the other Bluetooth device in discoverable mode. Therefore, sending inquiry_result_with_rssi will not work any more due to, in non-discoverable mode, the other Bluetooth will not reply to my inquiry.


My questions are:

1.) Do I have only one option left to get the rssi value that is to use the "HCI_Read_Rssi" with the connected device? If there is any other option, please kindly let me know. 

2.) Let say if i know the Bt_address of the other end and they are paired (with no connection), If there is a way, I can ask the rssi value from the other end directly?

Thank you very much in advance,

Newbie

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