config.json isn't tracked in git, so this records what changed on the Pi during today's connect/disconnect testing: Heater/Stirrer ports switched from /dev/ttyUSB0//dev/ttyACM0 to stable /dev/serial/by-id/... paths after a replug renumbered both devices, plus a reminder to remove the pre-edit config.json.bak-20260703212821 left on the Pi. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01YaPLuRPpyjWcwhMvCvpHCL