# Migration and Updates Log

**Date:** 2025-01-19  
**Version:** 2.0  
**Purpose:** Document what was moved, what was updated, and what actions are still needed

## 1. What Was Moved

All feature documentation files were copied from `System Design/Features/` to `System Design/system_arch_final/`:

### 1.1 Feature Files (Copied)

- ✅ `Features.md` – Main feature catalog
- ✅ `[DAQ] Sensor Data Acquisition Features.md`
- ✅ `[DQC] Data Quality & Calibration Features.md`
- ✅ `[COM] Communication Features.md`
- ✅ `[DIAG] Diagnostics & Health Monitoring Features.md`
- ✅ `[DATA] Persistence & Data Management Features.md`
- ✅ `[OTA] Firmware Update (OTA) Features.md`
- ✅ `[SEC] Security & Safety Features.md`
- ✅ `[SYS] System Management Features.md`
- ✅ `Cross-Feature Constraints.md`
- ✅ `System Assumptions & Limitations.md`

### 1.2 Supporting Documents (Referenced, Not Copied)

These documents remain in their original locations and are referenced from the system architecture documentation:

- `System Design/System_State_Machine_Specification.md`
- `System Design/Failure_Handling_Model.md`
- `System Design/SRS/SRS.md` and annexes
- `software design/components/ARCHITECTURE.md`
- `software design/components/application_layer/business_stack/*/COMPONENT_SPEC.md`

## 2. What Was Updated

### 2.1 Features.md

**Updates:**
- Added version 2.0 header with date and platform information
- Added technology stack summary section
- Added new features:
  - **F-DAQ-04:** Sensor State Management (updated with state flow)
  - **F-DQC-05:** Redundant Sensor Support (NEW)
  - **F-COM-04:** Long-Range Fallback Communication (NEW)
  - **F-DIAG-04:** Layered Watchdog System (NEW)
  - **F-DATA-04:** Power-Loss Data Protection (NEW)
  - **F-OTA-05:** A/B Partitioning with Rollback (NEW)
  - **F-SEC-04:** Security Violation Handling (NEW)
  - **F-SYS-05:** GPIO & Hardware Discipline (NEW)
  - **F-PWR-01, F-PWR-02:** Power & Fault Handling Features (NEW)
  - **F-HW-01, F-HW-02:** Hardware Abstraction Features (NEW)
- Updated technology specifications for all features
- Added traceability section

### 2.2 [COM] Communication Features.md

**Updates:**
- Added version 2.0 header
- Added technology stack section with detailed specifications:
  - Wi-Fi 802.11n (2.4 GHz) configuration
  - MQTT protocol configuration
  - TLS 1.2 / mTLS configuration
  - ESP-NOW configuration
  - CBOR encoding configuration
- Added F-COM-04: Long-Range Fallback Communication (NEW)
- Added new system requirements (SR-COM-011 through SR-COM-017)
- Added technology specifications section
- Updated traceability mapping

### 2.3 [SEC] Security & Safety Features.md

**Updates:**
- Added version 2.0 header
- Added technology stack section:
  - Secure Boot V2 specifications
  - Flash Encryption (AES-256) specifications
  - mTLS and X.509 certificate specifications
- Added F-SEC-04: Security Violation Handling (NEW)
- Added new system requirements (SR-SEC-013 through SR-SEC-015)
- Added implementation notes with technology details
- Added industrial standards compliance section

### 2.4 [OTA] Firmware Update (OTA) Features.md

**Updates:**
- Added version 2.0 header
- Added partition layout table (8MB flash)
- Added F-OTA-05: A/B Partitioning with Rollback (NEW)
- Added OTA policy table with detailed rules
- Added new system requirements (SR-OTA-014 through SR-OTA-016)
- Added technology specifications (SHA-256, A/B partitioning)
- Added gap closure section

### 2.5 New Feature Files Created

- ✅ `[PWR] Power & Fault Handling Features.md` – NEW
- ✅ `[HW] Hardware Abstraction Features.md` – NEW

### 2.6 New Documentation Files Created

- ✅ `System_Architecture_Documentation.md` – Comprehensive system documentation
- ✅ `Migration_and_Updates_Log.md` – This document

## 3. What Still Needs to Be Specified

### 3.1 Feature Files Requiring Updates

The following feature files were copied but may need updates based on gap analysis:

- ⚠️ `[DAQ] Sensor Data Acquisition Features.md`
  - **Action:** Add sensor state management details (F-DAQ-04)
  - **Action:** Add filtering algorithm specifications (Median filter N=5, Rate-of-change limiter)
  - **Action:** Add timing requirements (maximum 100ms per sensor acquisition cycle)

- ⚠️ `[DQC] Data Quality & Calibration Features.md`
  - **Action:** Add redundant sensor support details (F-DQC-05)
  - **Action:** Add sensor fusion algorithm specifications

- ⚠️ `[DIAG] Diagnostics & Health Monitoring Features.md`
  - **Action:** Add layered watchdog system details (F-DIAG-04)
  - **Action:** Add diagnostic code format details (0xSCCC)
  - **Action:** Add subsystem code allocation table

- ⚠️ `[DATA] Persistence & Data Management Features.md`
  - **Action:** Add power-loss data protection details (F-DATA-04)
  - **Action:** Add wear-aware management specifications
  - **Action:** Add storage separation details (NVS vs SD Card)

- ⚠️ `[SYS] System Management Features.md`
  - **Action:** Add GPIO & Hardware Discipline details (F-SYS-05)
  - **Action:** Add canonical GPIO map reference
  - **Action:** Update state list to include all 11 states

### 3.2 Missing Specifications

- ⚠️ **GPIO Map Document**
  - **Action:** Create canonical GPIO map document
  - **Location:** `System Design/system_arch_final/GPIO_Map.md`
  - **Content:** Complete GPIO pin assignments, strapping pin warnings, ADC1/ADC2 separation, I2C pull-up requirements

- ⚠️ **Sensor Abstraction Layer (SAL) Interface Specification**
  - **Action:** Create detailed SAL interface specification
  - **Location:** `System Design/system_arch_final/SAL_Interface_Specification.md`
  - **Content:** Complete API definition, sensor state machine, calibration procedures

- ⚠️ **Communication Protocol Specification**
  - **Action:** Create detailed MQTT topic structure and CBOR schema specification
  - **Location:** `System Design/system_arch_final/Communication_Protocol_Specification.md`
  - **Content:** Topic hierarchy, message formats, CBOR schemas, versioning strategy

- ⚠️ **Storage Layout Specification**
  - **Action:** Create detailed storage layout specification
  - **Location:** `System Design/system_arch_final/Storage_Layout_Specification.md`
  - **Content:** SD card file structure, NVS namespace layout, partition table details

### 3.3 Integration with SRS

- ⚠️ **SRS Updates**
  - **Action:** Review SRS for new features (PWR, HW) and ensure all SWRs are derived
  - **Location:** `System Design/SRS/SRS.md`
  - **Status:** SRS may need updates for new features

- ⚠️ **Traceability Updates**
  - **Action:** Update traceability matrix for new features
  - **Location:** `System Design/SRS/Annex_A_Traceability.md`
  - **Status:** New features need traceability links

### 3.4 Component Design

- ⚠️ **Component Specifications**
  - **Action:** Create component specifications for new components (Power Manager, Hardware Abstraction Layer)
  - **Location:** `software design/components/application_layer/.../COMPONENT_SPEC.md`
  - **Status:** New components need specifications

## 4. Recommended Actions

### 4.1 Immediate Actions (Before Implementation)

1. **Update Remaining Feature Files**
   - Update DAQ, DQC, DIAG, DATA, SYS feature files with new details
   - Add technology specifications where missing

2. **Create Missing Specifications**
   - GPIO Map document
   - SAL Interface Specification
   - Communication Protocol Specification
   - Storage Layout Specification

3. **Update SRS**
   - Derive SWRs for new features (PWR, HW)
   - Update traceability matrix

### 4.2 Short-Term Actions (During Component Design)

1. **Component Specifications**
   - Create specifications for Power Manager component
   - Create specifications for Hardware Abstraction Layer component
   - Update existing component specs if needed

2. **API Definitions**
   - Finalize SAL API
   - Finalize DP component API
   - Finalize Event System API

### 4.3 Long-Term Actions (During Implementation)

1. **Test Specifications**
   - Create test cases for new features
   - Update V&V matrix

2. **Documentation**
   - Update user documentation
   - Create developer guides

## 5. Document Status

**Status:** Complete for initial migration  
**Next Review:** After feature file updates  
**Owner:** System Architecture Team

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**This log should be updated whenever changes are made to the system architecture documentation.**
