Although much of the software that runs on the ESP32 microcontroller is open source, the Wi-Fi driver is not. Instead, it uses a proprietary binary blob. This was no problem for [Jasper Devreker]’s ...

As part of a team reverse-engineering the binary blob driver for the ESP32’s WiFi feature at Ghent University, [Jasper Devreker] saw himself faced with the need to better isolate the network packets ...