As a followup, I figured out that I was trying to sign a file which was already signed by the build process. I'm able to send this file without signing it again. I'm also able to build an unsigned version, then sign it through an AWS signing function, and send that. In both cases, the OTA update arr...

My project uses the ESP32 chip with software based on AmazonFreeRTOS, and we use Amazon IoT services for internet connectivity. I am not primarily a firmware developer but I've had to take over the project. At the moment I need to demonstrate the ability to send firmware updates to remote devices us...

I'm in need of a development board that supports security features such as secure boot. I purchased a lot of dev boards several years ago that do not. What should I be looking for and where can I find it? Thanks.