How do I use the BL620 Dongle with a Raspberry Pi?

Answer

No driver needs to be loaded onto the the Raspberry Pi as it already has an FTDI driver in the Raspbian Linux OS. Insert your BL620-US into a USB slot on your Raspberry Pi and enter the ls /dev/tty* command in a terminal session to see all of the available device names. Identify a device called "ttyACM0" and confirm this is the BL620 by removing the BL620-US and then doing the ls /dev/tty* command again to ensure the "ttyACM0" device is no longer in the list. To access the BL620-US simply open the device in the exact same way as you would for a Serial Port, "COM4" for example .