52 ODROID-XU4 USER MANUALThe four steps include:• Select the Serial port setup option, which will display screen 2.• In screen 2, type A to select option A. Edit the serial deviceto that used on your system. In this case it is: /dev/ttyUSB0. Ensurethe lockfile location is what was obtained earlier. Likewise, check thatoption E reflects the information shown in the figure: 115200 8N1. En-sure Hardware Flow Control is set to YES, then hit the ENTER key togo to the next screen.• In screen 3, select the Save setup as … option to save thisconfig for future use. Enter a filename at the new prompt. Hit ENTERto accept the filename. Then select Exit option to complete the configprocess.• You will now return to the terminal windows, as shown in step4. Reboot the XU4 and you will observe boot-time information scrollthrough the minicom (terminal) session.Bluetooth Module 2Hardkernel offers a bluetooth adapter called the Bluetooth (4.0)Module 2 which is certified to work with the XU4 under both Androidand Linux in the following modes:• Classic Bluetooth v2.0: Android, Linux• Bluetooth High Speed v3.0: Linux• Bluetooth low energy v4.0 (BLE): LinuxBluetooth Module 2 adapterWhile some of the required software modules may already existin your XU4’s image, it is helpful to install the following additional mod-ules and utilities using the following commands:$ sudo apt-get install bluez-dbg bluez-utils bluez-tools$ sudo apt-get install bluewho blueman python-bluetoothSome of these utilities may be used to debug your Bluetoothsetup if you are using a third-party bluetooth adapter. Next, checkthe USB information related to the adapter using the lsusb command.Chapter 4