🛜 ESPectre 👻 - v1.2.0

🏗️ Major Refactoring - Simplified Architecture

Architectural simplification: Focus on segmentation-only approach

This release removes the complex calibration/detection system in favor of a simpler, more maintainable segmentation-only architecture.

Key Changes

• Removed modules (6 files, ~2,845 lines removed, -60% complexity):

  • calibration.c/h - Complex calibration system
  • detection_engine.c/h - Multi-state detection engine
  • statistics.c/h - Statistics buffer and analysis

• Simplified core files:

  • espectre.c: 900 → 557 lines (-38%)
  • mqtt_commands.c: 966 → 604 lines (-37%)

• Cleaner MQTT API: 10 commands instead of 18

✨ New Features

Moving Variance Segmentation (MVS)

• Real-time motion segment detection and analysis
• Adaptive threshold based on moving variance
• Circular buffer maintains up to 10 recent segments
• Foundation for advanced motion pattern recognition

Amplitude-Based Skewness & Kurtosis

• +151% separation improvement
• Skewness: 2.91x separation, 82.3% accuracy, 0% false positives
• Kurtosis: 2.47x separation (+79% improvement)

Improved Traffic Generator

• ICMP ping-based (replaced UDP broadcast)
• Reliable CSI packet generation on every ping reply
• Auto-discovery of WiFi gateway
• Configurable rate: 1-50 pps

CSI Subcarrier Optimization

• Now captures ALL 64 subcarriers (+23% spatial information)
• Better movement detection accuracy

Local Segmentation Test Script

• Python tool for rapid parameter tuning without device flashing
• Parameter optimization with grid search
• Interactive visualization

🔧 Changes

• Temporal Features: Expanded from 8 to 10 features
• Modified Fisher Criterion: Improved feature selection algorithm
• Removed: Adaptive normalizer filter (code simplification)

📊 Benefits

• ✅ Simpler codebase (~2,845 lines removed)
• ✅ Easier to understand and maintain
• ✅ Focus on proven MVS algorithm
• ✅ Optional feature extraction (performance optimization)
• ✅ Better detection accuracy

📚 Documentation

• Updated README with changelog badge and links
• Complete CHANGELOG.md with detailed changes
• Improved badge interactivity

Full Changelog: https://github.com/francescopace/espectre/blob/main/CHANGELOG.md