35e5ffea1e
- PROTOCOL.md: topology, JSON schema, MQTT topic, auth, retry logic - HARDWARE.md: components, GPIO map, ASCII wiring, power, calibration - FIRMWARE_NOTES.md: stack (ESP32 core 3.x), libraries, main loop, known issues, TODO - INDEX.md: manifest + current status + blockers Current blocker: TITAN 9 P5 default = no RS232 output. Fix: call Zemic +7(472)277-71-19, set P5=3, then test on-site. Related server repo: admin/scales