Reorganize project structure and create development roadmap

- Move documentation to organized docs/ directory structure
- Add dev notes
- Create comprehensive 5-phase roadmap for indoor positioning system
- Move AT command manual and hardware images to docs/
- Update README with hardware links and project overview
- Remove sleep mode and OTA functionality for simplification
- Clean up project structure for production development

docs/ROADMAP.md

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+# Indoor Positioning System Roadmap
+**MaUWB ESP32-S3 Warehouse Positioning & WiFi Mapping System**
+
+---
+
+## 🎯 Project Overview
+
+**Purpose**: Indoor positioning system for warehouse WiFi strength mapping
+- **Hardware**: 1 mobile tag + 8+ battery-powered anchors
+- **Connectivity**: Tag connects to PC via USB, anchors are wireless-only
+- **Constraint**: Tag connects to 8 closest anchors (auto-switching)
+- **Goal**: Quick installation (<15 min) with automatic anchor positioning
+
+---
+
+## 📋 System Requirements
+
+### Hardware Components
+- [ ] **Tag Device**: ESP32-S3 with USB connectivity
+- [ ] **Anchor Devices**: 8+ ESP32-S3 units (battery powered)
+- [ ] **PC Interface**: USB connection for data collection
+- [ ] **Power Management**: Battery-powered anchors (no mains/WiFi)
+
+### Core Constraints
+- ✅ Battery-powered anchors (no WiFi connectivity)
+- ✅ Tag connects to 8 closest anchors (auto-switching)
+- ✅ USB-only connection (tag to PC)
+- ✅ No WiFi scanning needed (handled by PC)
+- ✅ Warehouse too large for simultaneous connection to all anchors
+
+---
+
+## 🏗️ System Architecture
+
+### Data Flow Design
+```
+Anchors (Battery) → Auto-Position Calibration → Store Coordinates Locally
+                                                        ↓
+Tag (Mobile) → Collect Raw Data + Anchor Coordinates → PC (USB) → Real-time Display
+                                    ↓                                      ↓
+                              Two Log Files                        Live Position View
+                                    ↓
+                            Web Application
+                         (Load both files)
+```
+
+### Critical Problem Solved
+**Challenge**: How do battery-powered anchors transmit calibrated positions to PC?
+**Solution**: Dual-file approach - Tag logs raw positioning data + anchor coordinates separately, webapp loads both files for offline processing
+
+---
+
+## 🚀 Implementation Roadmap
+
+### Phase 1: Anchor Auto-Positioning System
+**Duration**: 2-3 weeks
+
+#### 1.1 Distributed Positioning Algorithm
+- [ ] **Anchor Discovery Protocol**
+  - All anchors broadcast discovery signals on startup
+  - Build neighbor discovery table for each anchor
+  - Implement range-based network topology mapping
+
+- [ ] **Distance Measurement Matrix**
+  - Each anchor measures distances to all neighbors in range
+  - Store distance measurements locally (EEPROM/flash)
+  - Handle partial connectivity (not all anchors can reach each other)
+
+- [ ] **Coordinate System Establishment**
+  - Designate anchor with most connections as origin (0,0)
+  - Establish coordinate system orientation
+  - Implement distributed position calculation algorithm
+
+- [ ] **Position Calculation & Storage**
+  - Each anchor calculates its own position using trilateration
+  - Store calculated position in local memory
+  - Implement position confidence scoring
+
+#### 1.2 Anchor Communication Protocol
+- [ ] **Inter-Anchor Data Exchange**
+  - Protocol for sharing distance measurements
+  - Handle multi-hop communication for distant anchors
+  - Implement data consistency checks
+
+- [ ] **Position Refinement**
+  - Iterative position improvement algorithm
+  - Consensus mechanism for coordinate system alignment
+  - Error detection and correction
+
+### Phase 2: Tag Data Relay System
+**Duration**: 2 weeks
+
+#### 2.1 Enhanced Tag Functionality
+- [ ] **Anchor Discovery & Connection**
+  - Scan for available anchors
+  - Connect to 8 closest/strongest anchors
+  - Implement smooth anchor switching logic
+
+- [ ] **Position Data Collection**
+  - Request calibrated positions from connected anchors
+  - Aggregate anchor position data
+  - Handle missing or incomplete anchor data
+
+- [ ] **Real-time Positioning**
+  - Calculate tag position using 8 connected anchors
+  - Maintain position continuity during anchor handoffs
+  - Implement position smoothing/filtering
+
+#### 2.2 Tag Data Logging System
+- [ ] **Dual-File Logging**
+  - **File 1**: Raw positioning data (distances, RSSI, timestamps)
+  - **File 2**: Anchor coordinates database (collected from connected anchors)
+  - USB transfer to PC for both files
+
+- [ ] **Data Collection Protocol**
+  - Request anchor coordinates: "Send me your calibrated position"
+  - Anchor responds: {anchor_id, x, y, calibration_confidence}
+  - Store coordinates locally and update anchor database file
+  - Continue logging raw positioning data as current system does
+
+### Phase 3: PC Software Development
+**Duration**: 2 weeks
+
+#### 3.1 Real-time PC Application
+- [ ] **USB Communication & Live Display**
+  - Receive real-time data stream from tag via USB
+  - Parse incoming data: raw distances + anchor coordinates
+  - Calculate live tag position using anchor coordinates
+  - Display real-time position on 2D map
+
+- [ ] **Live Monitoring Features**
+  - Show current tag position with live updates
+  - Display connected anchors and their positions
+  - Real-time signal strength indicators
+  - Live path tracking during mapping session
+
+#### 3.2 Dual-File Logging (Background)
+- [ ] **Simultaneous Data Logging**
+  - **raw_positioning.csv**: Tag positioning data (distances, RSSI, timestamps)
+  - **anchor_coordinates.csv**: Anchor position database
+  - Log files generated automatically during real-time session
+  - Export files for webapp analysis after session
+
+- [ ] **Data Validation**
+  - Verify file integrity and format
+  - Check timestamp consistency
+  - Validate anchor coordinate data
+
+### Phase 4: Web Visualization Application
+**Duration**: 2-3 weeks
+
+#### 4.1 Core Web Interface
+- [ ] **Dual-File Upload & Processing**
+  - Upload **raw_positioning.csv** and **anchor_coordinates.csv**
+  - Parse and correlate both datasets
+  - Data validation and error handling
+  - Calculate actual tag positions using raw data + anchor coordinates
+
+- [ ] **2D Warehouse Visualization**
+  - Display anchor positions from coordinates file
+  - Calculate and plot tag path using positioning algorithm
+  - Interactive warehouse floor plan with scalable coordinate system
+
+#### 4.2 Path Analysis Features
+- [ ] **Path Tracking Visualization**
+  - Tag movement path overlay
+  - Timeline scrubbing and playback
+  - Speed and direction indicators
+
+- [ ] **Data Analysis Tools**
+  - Path statistics and metrics
+  - Export functionality (images, reports)
+  - Comparison between multiple mapping sessions
+
+### Phase 5: System Integration & Optimization
+**Duration**: 1-2 weeks
+
+#### 5.1 Quick Installation Workflow
+- [ ] **Automated Setup Process**
+  - Power-on all anchors simultaneously
+  - Auto-discovery and network formation
+  - Position calibration and verification
+  - Tag pairing and PC connection setup
+  - Target: Ready-to-use in <15 minutes
+
+#### 5.2 System Validation
+- [ ] **Accuracy Testing**
+  - Position accuracy validation
+  - Anchor auto-positioning verification
+  - End-to-end system testing
+
+- [ ] **Performance Optimization**
+  - Battery life optimization for anchors
+  - Data transmission efficiency
+  - Real-time performance tuning
+
+---
+
+## 🎯 Key Technical Challenges
+
+### 1. Distributed Anchor Positioning
+**Challenge**: Anchors must calculate positions without central coordination
+**Solution**: Implement distributed trilateration with consensus mechanism
+
+### 2. Data Relay Through Tag
+**Challenge**: Getting anchor position data to PC without direct connectivity
+**Solution**: Tag acts as mobile bridge collecting and relaying data
+
+### 3. Coordinate System Consistency
+**Challenge**: Ensuring all anchors use same coordinate system
+**Solution**: Distributed coordinate system establishment protocol
+
+### 4. Anchor Handoff Management
+**Challenge**: Smooth positioning during anchor switching
+**Solution**: Position continuity algorithms and coordinate system alignment
+
+### 5. Partial Connectivity Handling
+**Challenge**: Not all anchors can communicate directly
+**Solution**: Multi-hop communication and distributed data sharing
+
+---
+
+## 📦 Deliverables
+
+### Software Components
+- [ ] **Enhanced Anchor Firmware** - Auto-positioning and data storage
+- [ ] **Enhanced Tag Firmware** - Data relay and USB communication
+- [ ] **PC Data Collection Software** - USB interface and logging
+- [ ] **Web Visualization Application** - Path analysis and mapping
+
+### Documentation
+- [ ] **Installation Guide** - Quick setup procedures
+- [ ] **User Manual** - Operation and troubleshooting
+- [ ] **Technical Documentation** - API and protocol specifications
+- [ ] **Calibration Procedures** - System validation and accuracy testing
+
+### Test Results
+- [ ] **Positioning Accuracy Report** - Performance metrics
+- [ ] **Battery Life Analysis** - Power consumption data
+- [ ] **Installation Time Study** - Setup procedure validation
+
+---
+
+## 🔄 Success Criteria
+
+1. **Installation Time**: Complete system setup in <15 minutes
+2. **Positioning Accuracy**: <30cm accuracy in warehouse environment
+3. **Battery Life**: Anchors operate >8 hours on single charge
+4. **System Reliability**: 99%+ uptime during mapping sessions
+5. **Data Integrity**: Complete path tracking with <1% data loss
+6. **User Experience**: Simple web interface for path visualization
+
+
+*Last Updated: 2025-01-19*
+*Version: 1.0*