cost effective designs

If quantity is large, I see no reason why it cannot be US$3.

then why bluetooth breakout boards are costly?

can we make a BLE receiver using bluetooth dongle?

If you manufacture a large quantity and choose cost effective solution, the price can be as low as US $3. As I know, bluetooth classic dongle cannot be used for BLE receiver.

my aim,

to build a low cost Bluetooth receiver.

received data should be able to read by a micro-controller

if data is 1 ; relay on

if data is 0 relay off

really want to build one , not interested in modules,

know about wireless MCU(cc series),

heard about smart rf studio

but...............

dont know how to combine these,,

dont know about the need of other software or hardware..

can any one say a step by step method to do this?

sorry for the trouble ................. :-)