List local bluetooth devices

# hcitool dev

Scan for bluetooth devices around

# hcitool scan

Bluetooth ping

# l2ping AA:BB:CC:DD:EE:FF

Browse services provided by this computer

# sdptool browse local

Browse services provided by another device

# sdptool browse --raw AA:BB:CC:DD:EE:FF

Connect /dev/rfcomm0 to another device channel 3

# rfcomm connet 0 AA:BB:CC:DD:EE:FF 3