MAC Address
The MAC address is saved in the flash memory of the Computer on Modules.
Serial Number and MAC Address Relationship
For details on serial numbers and MAC addresses relationship, see MAC Address.
Linux
The Network on Toradex Computer on Modules article provides information on how to get and set MAC addresses for SoM with Linux-based OSes.
WinCE/WEC
Change the MAC Address
If your company has its own MAC address range, you can change the MAC address. The easiest way to do this is to use the bootloader. You can find the MAC in the bootloader menu in the section MAC.
Also the Colibri Tweak provides a function to change the Mac/Serial Number.
Read from a Program
See the SysInfoLib to know how to get the MAC address inside a program.