How to connect your NXT via Bluetooth A step-by-step instruction
Connect your NXT to a computer and turn on the NXT.
Open the NXT window, located in the upper-right corner of the controller.
Click and highlight your USB connected robot, click “Connect”, and then rename on the device info panel, on the left. Info Panel
Click “Scan.”
Highlight your robot, then click select.
Select your Bluetooth-connected robot and click “Connect.”
Click pair.
Enter the code “1234”, then press the orange button on the NXT once it makes the clicking sound.
The next time you connect, simply open the NXT window and select your Bluetooth connected robot.
Write your program, and download (or run wirelessly)!