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I have got that problem too. And this is a bug in the NXT 2.0 system, So there are two solutions: 1- Using the USB Cable instead of Bluetooth as it give no errors and it is faster also it keeps your battery life for longer time. 2-Update your NXT Firmware frequently as the LEGO may be fixed the problem.

The hidden button under the NXT battery seems to be a reset button, which has to be pressed for 7 seconds to have any effects. I assume it resets the brick in its factory condition, but I didn't find any specific documentation from LEGO on it. However, there was an issue a few years back which caused the brick to freeze and click permanently (which was ...

Carl, I have the same problem with Mountain Lion and Mindstorms that I bought for Christmas. I have discovered the following so far: This is a known problem that Legos has not taken any action on. I believe it is related to two things: different bluetooth chips and Lion / Mountain Lion OS changes. The Macs with Broadcom Bluetooth chips supposedly will ...

Also - check what device you are working with. I know the iPhone doesn't recognize the NXT because it's not an "officially supported" Bluetooth device. The only way to get your iPhone or iPod to work is to "jailbreak" them. I'm not too sure if this extrapolates to all apple products either. I would agree with the user above. Revert to the original ...

Those answers above do all work. If I were looking for fast speed, I would probably use USB, however if you robot moves around, then bluetooth is probably the best solution (the slowest thing in the loop is the NXT anyhow :P). If your Bluetooth hardware on your computer supports multiple devices, then simply address each associated COM port per device. ...