Agar tidak pakai sudo :
sudo vi /etc/udev/rules.d/99-serial-permission.rules
KERNEL==”ttyS0″, MODE=”0666″
sudo udevadm control –reload-rules
sudo udevadm trigger
Write :
echo “coba” > /dev/ttyS0
Read :
cat /dev/ttyS0
atau pakai screen masing2 :
screen /dev/ttyS0 9600