The BLE 2 Click Board™ is an excellent choice if you want simple, temporary connectivity with your smart devices over Bluetooth 4.1.
The BLE 2 Click Board™ features the RN4020 module from Microchip, which integrates RF, a baseband controller, and a command API processor, making it a complete Bluetooth Low Energy solution. The Click Board™ communicates with the target board MCU through MikroBUSRX, TX and AN (CMD), PWM (con.), and RST (wake) lines. The board is designed to use a 3.3V power supply only.