Why busybox ping hung after the first reply inside a minimal Linux VM: the tinyconfig kernel lacked timer support, so alarm() never fired.

An unrestricted file upload in the Siglent SDS1104X-E web interface allowed remote code execution; a writeup of the bug, its disclosure, and the fix.

Adding WiFi remote control to an Elegoo Mars Pro resin printer with a Raspberry Pi Zero W on its serial port, running the mariner web interface.