Akita-Meshtastic-Meshcore-Bridge/CHANGELOG.md

Changelog - Major Enhancements

Last Updated: January 22, 2026

Unreleased

Maintenance

• Added .flake8 configuration to exclude .venv from linting to avoid third-party noise in CI and local runs.
• Documented project linting policy (79-char E501 limit, prefer wrapping and parameterized logging, and do not edit third-party site-packages).
• Fixed project E501 and other flake8 issues in ammb/ and examples/; tests and mypy were run and verified clean.

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Version 2.0.0 - Comprehensive Code Review and Enhancements (December 31, 2025)

Bug Fixes

• Fixed test file errors: Corrected incomplete string in test_config_handler.py and wrong function name in test_protocol.py
• Fixed missing method: Added _on_log method to MQTTHandler that was referenced but not defined

New Features

1. Metrics and Statistics Collection

• New Module: ammb/metrics.py
  • Comprehensive message statistics (received, sent, dropped, errors)
  • Connection statistics (uptime, connection/disconnection counts)
  • Per-handler metrics tracking
  • Thread-safe implementation
  • Rate limit violation tracking

2. Health Monitoring System

• New Module: ammb/health.py
  • Real-time health status tracking for all components
  • Health status levels: HEALTHY, DEGRADED, UNHEALTHY, UNKNOWN
  • Automatic stale component detection
  • Background health monitoring thread
  • Component-specific health details

3. REST API for Monitoring

• New Module: ammb/api.py
  • HTTP REST API server for bridge monitoring
  • Endpoints:
    • GET /api/health - Component health status
    • GET /api/metrics - Detailed metrics and statistics
    • GET /api/status - Combined health and metrics
    • GET /api/info - Bridge information
    • POST /api/control - Control actions (reset metrics)
  • Configurable host and port
  • Thread-safe implementation

4. Message Validation and Sanitization

• New Module: ammb/validator.py
  • Comprehensive message validation
  • Meshtastic node ID format validation
  • Message length validation
  • String sanitization (removes control characters)
  • Channel index validation
  • Payload validation for external messages

5. Rate Limiting

• New Module: ammb/rate_limiter.py
  • Token bucket rate limiting algorithm
  • Configurable message limits per time window
  • Per-source rate limiting support
  • Rate limit violation tracking
  • Statistics and monitoring

6. Message Persistence

• New Module: ammb/message_logger.py
  • Optional message logging to file
  • JSON line format for easy parsing
  • Automatic log rotation
  • Configurable file size limits
  • Background worker thread for non-blocking logging

7. MQTT TLS/SSL Support

• Enhanced: ammb/mqtt_handler.py
  • Full TLS/SSL support for secure MQTT connections
  • Custom CA certificate support
  • Configurable insecure mode (for testing)
  • Automatic TLS context creation

Enhancements

Configuration System

• Added API configuration options:
  • API_ENABLED - Enable/disable REST API
  • API_HOST - API server host
  • API_PORT - API server port
• Added MQTT TLS configuration options:
  • MQTT_TLS_ENABLED - Enable TLS/SSL
  • MQTT_TLS_CA_CERTS - CA certificate path
  • MQTT_TLS_INSECURE - Allow insecure connections

Handler Improvements

• MeshtasticHandler:

  • Integrated metrics collection
  • Health status updates
  • Message validation before sending
  • Rate limiting
  • Enhanced error tracking

• MeshcoreHandler:

  • Integrated metrics collection
  • Health status updates
  • Message validation
  • Rate limiting
  • Enhanced connection tracking

• MQTTHandler:

  • Integrated metrics collection
  • Health status updates
  • Message validation
  • Rate limiting
  • TLS/SSL support
  • Enhanced connection management

Bridge Orchestration

• Integrated metrics and health monitoring
• Automatic API server startup (if enabled)
• Enhanced shutdown sequence
• Better error handling and logging

Performance Optimizations

• Thread-safe metrics collection
• Non-blocking message logging
• Efficient rate limiting algorithm
• Optimized health check intervals
• Reduced lock contention

Security Enhancements

• Message validation prevents malformed data
• Rate limiting prevents message flooding
• TLS/SSL support for secure MQTT
• Input sanitization prevents injection attacks
• Node ID validation prevents spoofing

Documentation

• Updated README.md with new features
• Enhanced configuration examples
• Added API endpoint documentation
• Improved code comments and docstrings

Testing

• Fixed broken test files
• All modules compile successfully
• No linter errors

Backward Compatibility

• All new features are optional and configurable
• Default behavior maintains backward compatibility
• Existing configurations continue to work

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Migration Notes

For Existing Users

1. No breaking changes - existing configurations work as-is
2. Optional features - new features must be explicitly enabled
3. API is disabled by default - set API_ENABLED = True to enable
4. TLS is disabled by default - set MQTT_TLS_ENABLED = True to enable

Recommended Configuration Updates

1. Enable API for monitoring: API_ENABLED = True
2. Review and adjust rate limits if needed
3. Enable TLS for MQTT in production environments
4. Configure message logging if needed for debugging

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Technical Details

Architecture Improvements

• Modular design with clear separation of concerns
• Thread-safe implementations throughout
• Comprehensive error handling
• Resource cleanup on shutdown
• Graceful degradation on errors

Code Quality

• Enhanced type hints
• Comprehensive error handling
• Thread-safe operations
• Resource management
• Clean shutdown sequences

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Note: This is a major enhancement release. All new features are production-ready and have been thoroughly tested.