Dear Reader,
In the last four weeks, I got the OTA update of the rootfs image working reliably. The developers of my customer use the OTA update for 7 devices. By now, I can perform offline updates from a USB drive.
I spent a lot more time integrating the main customer application and my update library into the Yocto build than implementing the update functionality itself. Even after years of working with Yocto, it is still a black hole for my time 😮💨
At least, I learned a couple things like exporting and importing CMake modules through Yocto recipes. If you want to or have to understand this as well, don’t worry. I am planning to write a blog post or two about it.
Happy reading,
Burkhard
The Server-Side of Over-the-Air Updates
Context
In the last episode, I looked at the client-side of OTA updates: the double-copy (A/B) and single-copy-with-rescue update strategies, updating the boot loader, offline updates, and automatic or interactive updates. In this episode, I’ll introduce you to the server side of OTA updates.