Thanks a lot, i will look into your suggenstion.
I know that the entire BLE is a HUGE undertaking to understand completely and i have no intention of trying to do that in the time i have avaiable, so i will only need to undertand the very basics of Bluetooth and roughly how BLE is different.
I know the cc2540 is a complete embedded setup but since i'm using the AVR for other different things i will need that to be my primary µcontroller(also this platform i have the most experience in using so its the safe choice mor my bachelor thesis, dont want to spend to much time familiarizing my self with multiple new platforms and IDE's).So thats why i need this kit to "simply" provide me with a Low-Energy serial connection...
but i will look into you suggestions and report back with progress.