title: Bluez Programming
body: <p>I'm programming in BlueZ on my Raspberry Pi with an USB Bluetooth dongle.
  I need to be able to programmatically connect to an Arduino BT, the problem is that the Bluetooth module of the Arduino is still using legacy pairing so whenever I try to open a socket to the device I get a <code>Permission Denied</code>.
  How do I send along a PIN to complete the pairing request through BlueZ?</p>