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Created page with "* This application note is applicable to Airtop3 * It provides configuration instructions to work with COM1 and COM3 in Linux environment. == Instructions == * There are 2 se..."
* 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
<pre>
# NOTE: COM2 intended for BIOS debugging and not available as regular COM port!
</pre>
* 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"
<pre>
# 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
</pre>
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