- Replace 11 per-frequency build environments with 3 role-based targets
(production, debug, test) using shared [env] base section
- Move LoRa frequency and sender-ID config from build flags into config.h
so all variants build from the same source
- Add -fstack-protector-strong, -D_FORTIFY_SOURCE=2, -Wformat-security
- Add Unity test framework to lib_deps for pio test support
- Add __pycache__/ to .gitignore
- Implement periodic WiFi reconnection attempts when stuck in AP mode
- Add WIFI_RECONNECT_INTERVAL_MS config (default 60s) for configurable retry frequency
- Prevent data loss by automatically attempting to switch back to STA mode
- Maintain AP mode for manual configuration if reconnection fails
- Track WiFi config and last reconnection attempt time in shared state
- Add wifi_try_reconnect_sta() and wifi_restore_ap_mode() helper functions
- Log reconnection attempts and results for debugging
Resolve merge conflict in src/main.cpp by accepting the refactored version
from origin. The remote branch includes significant architectural improvements:
- New app context and state machine structures
- Refactored receiver and sender logic
- Library reorganization (dd3_legacy_core, dd3_transport_logic)
- Test framework enhancements
- Code quality improvements
The local WiFi reconnection feature (commit 32cd065) will be
re-integrated if needed in the new architecture.
## Bug Fixes
- Fix integer overflow potential in history bin allocation (web_server.cpp)
Using uint64_t for intermediate multiplication prevents overflow with different constants
- Prevent data loss during WiFi failures (main.cpp)
Device now automatically attempts WiFi reconnection every 30 seconds when in AP mode
Exits AP mode and resumes MQTT transmission as soon as WiFi becomes available
Data collection and SD logging continue regardless of connectivity
## New Features
- Add standalone MQTT data republisher for lost data recovery
- Command-line tool (republish_mqtt.py) with interactive and scripting modes
- GUI tool (republish_mqtt_gui.py) for user-friendly recovery
- Rate-limited publishing (5 msg/sec default, configurable 1-100)
- Manual time range selection or auto-detect missing data via InfluxDB
- Cross-platform support (Windows, macOS, Linux)
- Converts SD card CSV exports back to MQTT format
## Documentation
- Add comprehensive code review (CODE_REVIEW.md)
- 16 detailed security and quality assessments
- Identifies critical HTTPS/auth gaps, medium-priority overflow issues
- Confirms absence of buffer overflows and unsafe string functions
- Grade: B+ with areas for improvement
- Add republisher documentation (REPUBLISH_README.md, REPUBLISH_GUI_README.md)
- Installation and usage instructions
- Example commands and scenarios
- Troubleshooting guide
- Performance characteristics
## Dependencies
- Add requirements_republish.txt
- paho-mqtt>=1.6.1
- influxdb-client>=1.18.0
## Impact
- Eliminates data loss scenario where unreliable WiFi leaves device stuck in AP mode
- Provides recovery mechanism for any historical data missed during outages
- Improves code safety with explicit overflow-resistant arithmetic
- Increases operational visibility with comprehensive code review
- Make include/ the canonical declarations for data_model/html_util/json_codec and convert dd3_legacy_core header copies to thin forwarders.
- Add stable public forwarders for app_context/receiver_pipeline/sender_state_machine and update refactor smoke test to stop using ../../src includes.
- Force-link dd3_legacy_core from setup() to ensure deterministic PlatformIO LDF linking across firmware envs.
- Refresh docs (README, Requirements, docs/TESTS.md) to reflect current module paths and smoke-test include strategy.
