Application note - Airtop3 serial port configuration in Linux

• This application note is applicable to Airtop3
• It provides configuration instructions to work with COM1 and COM3 in Linux environment.

Instructions

• There are 2 serial ports available for usage: COM1 and COM3

# NOTE: COM2 intended for BIOS debugging and not available as regular COM port!

• COM1 is accessible as device node /dev/ttyUSB0
• COM3 is accessible as device node /dev/ttyS6 starting from BIOS version ATOP3.PRD.0.30.3 and with kernel boot option "acpi_osi=Linux"

# NOTE: to add kernel boot option "acpi_osi=Linux" please do:
$ sudo sed '/GRUB_CMDLINE_LINUX_DEFAULT=/s/.$/\ acpi_osi=Linux\"/' -i /etc/default/grub
$ sudo update-grub2