Sorry if the question is very basic.
What I know?
Bluetooth Low Energy is supported in the blutooth version 4.0. and it is a client server model. That is server is kind of advertiser, and client is a receiver.
My Question.
1) Does both the device [ client/ server] needs external hardware bluetooth chip support for BLE?
Or,
It is just enough only server to have external hardware bluetooth controller for the BLE?
2) Why i am asking this question is that Bluetooth 4.0 is just a different implementation algorithm comparing with classic bluetooth, in all layers of the bluetooth stack, to avoid energy consumption. In that case, what is the contribution of external BLE controller?.