Serial connect to Wandboard

Wandboard is a low cost pc which supports linux and android operating system.Hardware is based on freescale.

Below are the settings which can be used to connect to a wandboard box through serial console.

115200 kbits/sec
8 data bits
No parity
1 stop bit

Abbreviated as 115200-8-n-1
No hardware flow control is used.

Command to be used in linux.

screen /dev/ttyS0 115200 8N1

Change the serial device as is in your machine.

Ubuntu, GRUB 2 and serial console

We can configure Ubuntu machine to connect to it via serial console port(COM port).It will help us to administer the machine when there is no input devices(mouse, keyborad) or no network is available.

Enabling serial console has been changed in GRUB 2.Change GRUB_CMDLINE_LINUX to start console on ttyS0.

Open grub configuration file /etc/default/grub.
sudo vim /etc/default/grub

Set below entries to GRUB_CMDLINE_LINUX
GRUB_CMDLINE_LINUX="console=tty0 console=ttyS0,38400n8"

Add serial console entries to the same file
## Serial console
GRUB_TERMINAL=serial
GRUB_SERIAL_COMMAND="serial --speed=38400 --unit=0 --word=8 --parity=no --stop=1"


Update GRUB
sudo update-grub

Reboot the machine check if changes were successful.Run the command below.
sudo cat /proc/cmdline

Output:
BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic root=UUID=4c4e78f3-fb88-4617-bf9c-34a53e05c7b2 ro console=tty0 console=ttyS0,38400n8 quiet splash vt.handoff=7

console=tty0 console=ttyS0,38400n8 entry confirms that serial console is enabled.