Connect PC to EV3 via Bluetooth

1. Turn on the EV3 brick.
2. Connect EV3 brick to the computer with USB cable. 
3. Activate Bluetooth on EV3 brick
• Go to Settings tab 
• Select Bluetooth. 
• Check Visibility
• Check Bluetooth
• Uncheck iPhone/ iPad/ iPod (push Center Button) in case of connecting to PC or Andriod
4. Run LEGO MINDSTORMS EV3 software on PC

• Go to the Bricks tab on the Bottom-Right corner of screen
• Click Refresh
• Check the box under Bluetooth symbol. 
• If the checkbox cannot be checked, click Refresh again.
• Bluetooth connection icon at the top left of the EV3 Brick's screen
• <> : Connect
• < : Not connect

• Unplug USB cable and download program via Bluetooth
• Next time we do not need to use USB cable (If we didn’t connect a USB cable to make the first connection, EV3 brick will ask you to input password and the software on PC will ask you to input the same password to pair EV3 to PC.)

Reference : Valk, Laurens (2014-06-03). The LEGO MINDSTORMS EV3 Discovery Book (Full Color): A Beginner's Guide to Building and Programming Robots