long distance remote control with sensor return. the Wifi. Even if the Xbee range is more important, it only remains a point to point .. Returns the current date Returns the current .. Using this NXT-G block, you can ask a set of questions to your WifiBlock and receive Boolean (yes/no).
To send the I2C signal to long distance(25 meters) I use P82B96 I2C buffer. can improve performance (but too small isn't a good idea, don't overdo it). for on board local peripheral devices, consider using an RF link, Xbee is simple to use.