BlueZ on i.MX25 : Can't connect RFCOMM socket: Operation now in progress

linux,bluetooth,embedded-linux,bluez,rfcomm

It turns out the target device was requesting authentication from my i.MX25 board. Usually, PIN code handling is done by using bluetooth-agent. But this agent wasn't actually installed on the board (I thought it was...), so I had to manually provide the requested PIN code. This is how I did...