ChromiteBlue.com

it is vital that the following python packages are installed:

• NXT Python
• PyBlueZ for Bluetooth communication

to test PyBlueZ, the following can be used (code by Albert Huang <albert@csail.mit.edu>)

#!/usr/bin/env python
import bluetooth
print "performing inquiry..."
nearby_devices = bluetooth.discover_devices(lookup_names = True)
print "found %d devices" % len(nearby_devices)
for name, addr in nearby_devices:
    print "  %s - %s" % (addr, name)

as I do not care for gnome, my default desktop is KDE,
what follows is my procedure for pairing with a NXT Brick.

[root@motoko]# /usr/bin/bluetooth-applet &

a Bluetooth icon will appear in your system tray,

right-click the Bluetooth icon and click “Preferences” from the popup.

• set the radio button under “Mode of operation” to be “Visible and connectable for other devices”
  (even if it ought to be “connectible”)
• click “Close”

on the NXT Brick, from the root menu,

• select “Bluetooth” and press the square button.
• select “Search” and press the square button.
• after it has finished searching, select the name that matches your computer and press the square button.
• select “[1]” and press the square button.
• wait for it to connect.
• enter passkey, or press the square button for the “1234″ default.
• Bluetooth icon will begin to blink, click it and enter the passkey in the resulting dialog.
• right-click the Bluetooth icon and click “Preferences” from the popup.
  • select the NXT Brick in the “Bonded devices” box.
  • Click “Set Trusted”
  • click “Close”

the connection can now be tested with the following python code:

#!/usr/bin/env python
import nxt.locator
sock = nxt.locator.find_one_brick()
if sock:
	brick = sock.connect()
	name, host, signal_strength, user_flash = brick.get_device_info()
	print 'NXT brick name: %s' % name
	print 'Host address: %s' % host
	print 'Bluetooth signal strength: %s' % signal_strength
	print 'Free user flash: %s' % user_flash
	sock.close()