Application note - Airtop3 serial port configuration in Linux

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


  • 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