The communication between Arduino and other devices over Bluetooth.

What we need:

• Arduino Leonardo
• USB Bluetooth Dongle 4.0
• direct-current motor

Serial Bluetooth Terminal on Linux

sudo apt-get install bluez bluez-tools
hciconfig
hcitool scan
bluez-simple-agent xx:xx:xx:xx:xx   # the bluetooth device you want to pair

In /etc/bluetooth/rfcomm.conf:

rfcomm 0 {
    bind no;
    device xx:xx:xx:xx:xx;
    channel 1;
    comment "Serial Port";
}

sudo rfcomm0 connect 0