Notes on software, systems, machines,
mistakes and whatever I am currently trying to understand.
Listening at the OBD-II port, finding K-CAN behind the radio, picking the wrong bit rate, and finally getting 400 frames a second out of a car that's been sitting for who knows how long.
Wiring an ESP32 into a MUST PV1900 over RS485, and what a warning buried in someone else's source code taught me about respecting undocumented hardware.
How a port collision exposed the wrong hosting abstraction and led ZenHost to isolate apps with Linux network namespaces and Caddy.