A board is based on the STM32F4 series microcontroller. The customer wanted a provision to update the application image through the Ethernet interface. The application image should be accepted by the board only if its from an authorized source, so that unauthorized update is prohibited.

This case-study involves, booting all the lab computers over the network, with a Linux kernel and a minimal root filesystem image, using PXE boot. This way each computer did not have to be individually setup. The Tiny Core Linux distribution was used to create a minimal filesystem image, containing the firefox browser.