# Sensor Manager Component Specification

**Component ID:** C-SENSOR-001  
**Version:** 1.0  
**Date:** 2025-02-01  
**Location:** `application_layer/business_stack/sensor_manager/`

## 1. Component Overview and Scope

The Sensor Manager component coordinates all sensor-related operations including lifecycle management, data acquisition scheduling, high-frequency sampling, local filtering, and sensor state management. It serves as the central coordinator for the Sensor Data Acquisition feature (F-DAQ).

**Primary Purpose:** Provide centralized sensor lifecycle management and data acquisition coordination for environmental sensors.

**Scope:** Multi-sensor data acquisition, sensor state management, high-frequency sampling, local filtering, and sensor fault detection.

## 2. Responsibilities and Functions

### 2.1 Primary Responsibilities

- **Sensor Lifecycle Management:** Detection, initialization, configuration, and teardown of all sensor types
- **Data Acquisition Coordination:** Scheduling and executing 1-second sensor sampling cycles
- **High-Frequency Sampling:** Multiple samples per sensor per cycle (default: 10 samples)
- **Local Data Filtering:** Apply configurable filters (median, moving average, rate-of-change limiter)
- **Sensor State Management:** Track and manage sensor operational states and transitions
- **Data Record Generation:** Create timestamped sensor data records with validity status
- **Event Publication:** Publish sensor data updates and state changes via Event System
- **Sensor Fault Detection:** Detect and report sensor communication failures and out-of-range values

### 2.2 Non-Responsibilities

- **Hardware Access:** Delegates to sensor drivers (no direct I2C/SPI/UART access)
- **Data Persistence:** Delegates to Data Persistence component
- **Communication:** Delegates to Communication components
- **Time Management:** Uses Time Utils for timestamp generation
- **Fault Classification:** Uses Error Handler for fault reporting and escalation

## 3. Provided Interfaces

### 3.1 Initialization and Configuration Interface

```c
/**
 * @brief Initialize Sensor Manager component
 * @return true if initialization successful, false otherwise
 */
bool sensorMgr_initialize(void);

/**
 * @brief Load sensor configuration from Machine Constants
 * @param mc Machine constants structure
 * @return true if configuration loaded, false on error
 */
bool sensorMgr_loadConfiguration(const machine_constants_t* mc);

/**
 * @brief Detect all connected sensors
 * @return Number of sensors detected
 */
uint8_t sensorMgr_detectSensors(void);

/**
 * @brief Shutdown Sensor Manager (cleanup resources)
 * @return true if shutdown successful, false otherwise
 */
bool sensorMgr_shutdown(void);
```

### 3.2 Acquisition Control Interface

```c
/**
 * @brief Start sensor data acquisition
 * @return true if acquisition started, false on error
 */
bool sensorMgr_startAcquisition(void);

/**
 * @brief Stop sensor data acquisition
 * @return true if acquisition stopped, false on error
 */
bool sensorMgr_stopAcquisition(void);

/**
 * @brief Pause sensor data acquisition
 * @return true if acquisition paused, false on error
 */
bool sensorMgr_pauseAcquisition(void);

/**
 * @brief Resume sensor data acquisition
 * @return true if acquisition resumed, false on error
 */
bool sensorMgr_resumeAcquisition(void);

/**
 * @brief Check if acquisition is active
 * @return true if acquisition is running, false otherwise
 */
bool sensorMgr_isAcquisitionActive(void);
```

### 3.3 Sensor Control Interface

```c
/**
 * @brief Enable a specific sensor
 * @param sensor_id Sensor identifier (0-6)
 * @return true if sensor enabled, false on error
 */
bool sensorMgr_enableSensor(uint8_t sensor_id);

/**
 * @brief Disable a specific sensor
 * @param sensor_id Sensor identifier (0-6)
 * @return true if sensor disabled, false on error
 */
bool sensorMgr_disableSensor(uint8_t sensor_id);

/**
 * @brief Configure sensor parameters
 * @param sensor_id Sensor identifier
 * @param config Sensor configuration structure
 * @return true if configuration applied, false on error
 */
bool sensorMgr_configureSensor(uint8_t sensor_id, const sensor_config_t* config);

/**
 * @brief Recalibrate a sensor
 * @param sensor_id Sensor identifier
 * @param calibration_data Calibration parameters
 * @return true if calibration applied, false on error
 */
bool sensorMgr_calibrateSensor(uint8_t sensor_id, const sensor_calibration_t* calibration_data);
```

### 3.4 Data Access Interface

```c
/**
 * @brief Get latest data from a specific sensor
 * @param sensor_id Sensor identifier
 * @param record Output buffer for sensor data record
 * @return true if data retrieved, false on error
 */
bool sensorMgr_getLatestData(uint8_t sensor_id, sensor_data_record_t* record);

/**
 * @brief Get latest data from all sensors
 * @param records Output buffer for sensor data records
 * @param count Input: buffer size, Output: number of records filled
 * @return true if data retrieved, false on error
 */
bool sensorMgr_getAllSensorData(sensor_data_record_t* records, size_t* count);

/**
 * @brief Get sensor data with history (last N samples)
 * @param sensor_id Sensor identifier
 * @param records Output buffer for historical records
 * @param count Input: requested count, Output: actual count returned
 * @return true if data retrieved, false on error
 */
bool sensorMgr_getSensorHistory(uint8_t sensor_id, sensor_data_record_t* records, size_t* count);
```

### 3.5 State Management Interface

```c
/**
 * @brief Get sensor operational state
 * @param sensor_id Sensor identifier
 * @return Current sensor state
 */
sensor_state_t sensorMgr_getSensorState(uint8_t sensor_id);

/**
 * @brief Check if sensor is present (detected)
 * @param sensor_id Sensor identifier
 * @return true if sensor is present, false otherwise
 */
bool sensorMgr_isSensorPresent(uint8_t sensor_id);

/**
 * @brief Check if sensor is enabled for acquisition
 * @param sensor_id Sensor identifier
 * @return true if sensor is enabled, false otherwise
 */
bool sensorMgr_isSensorEnabled(uint8_t sensor_id);

/**
 * @brief Check if sensor is healthy (no faults)
 * @param sensor_id Sensor identifier
 * @return true if sensor is healthy, false if faulty
 */
bool sensorMgr_isSensorHealthy(uint8_t sensor_id);

/**
 * @brief Get sensor information
 * @param sensor_id Sensor identifier
 * @param info Output buffer for sensor information
 * @return true if information retrieved, false on error
 */
bool sensorMgr_getSensorInfo(uint8_t sensor_id, sensor_info_t* info);
```

### 3.6 Statistics and Diagnostics Interface

```c
/**
 * @brief Get sensor acquisition statistics
 * @param sensor_id Sensor identifier
 * @param stats Output buffer for statistics
 * @return true if statistics retrieved, false on error
 */
bool sensorMgr_getSensorStatistics(uint8_t sensor_id, sensor_stats_t* stats);

/**
 * @brief Reset sensor statistics
 * @param sensor_id Sensor identifier (SENSOR_ID_ALL for all sensors)
 * @return true if statistics reset, false on error
 */
bool sensorMgr_resetSensorStatistics(uint8_t sensor_id);

/**
 * @brief Get overall acquisition performance metrics
 * @param metrics Output buffer for performance metrics
 * @return true if metrics retrieved, false on error
 */
bool sensorMgr_getPerformanceMetrics(acquisition_metrics_t* metrics);
```

## 4. Required Interfaces

### 4.1 Sensor Driver Interfaces

- **Interface:** Sensor hardware abstraction layer
- **Providers:** Temperature, Humidity, CO2, NH3, VOC, PM, Light sensor drivers
- **Usage:** Hardware-specific sensor communication and data reading
- **Data Types:** `sensor_driver_t`, `sensor_reading_t`

### 4.2 Event System Interface

- **Interface:** Event publishing and subscription
- **Provider:** Event System component
- **Usage:** Publish sensor data updates and state changes
- **Data Types:** `event_type_t`, `sensor_data_event_t`

### 4.3 Time Utils Interface

- **Interface:** Timestamp generation
- **Provider:** Time Utils component
- **Usage:** Generate timestamps for sensor data records
- **Data Types:** `uint64_t` timestamp in milliseconds

### 4.4 Machine Constants Manager Interface

- **Interface:** Configuration data access
- **Provider:** Machine Constants Manager component
- **Usage:** Load sensor configuration and calibration parameters
- **Data Types:** `machine_constants_t`, `sensor_config_t`

### 4.5 Error Handler Interface

- **Interface:** Fault reporting
- **Provider:** Error Handler component
- **Usage:** Report sensor faults and failures
- **Data Types:** `fault_severity_t`, `sensor_fault_info_t`

### 4.6 Logger Interface

- **Interface:** Diagnostic logging
- **Provider:** Logger component
- **Usage:** Log sensor operations and diagnostics
- **Data Types:** Log levels, message strings

## 5. External Interfaces

### 5.1 Environmental Sensors Interface

- **Interface:** Physical sensor hardware
- **Consumers:** Sensor drivers
- **Usage:** Read environmental data (temperature, humidity, CO2, etc.)
- **Protocols:** I2C, SPI, UART, Analog

## 6. Internal Interfaces

### 6.1 Acquisition Scheduler Interface

- **Interface:** Internal acquisition timing control
- **Usage:** Schedule and coordinate sensor sampling cycles
- **Implementation:** Private to Sensor Manager

### 6.2 Filter Engine Interface

- **Interface:** Internal data filtering
- **Usage:** Apply configurable filters to raw sensor data
- **Implementation:** Private to Sensor Manager

### 6.3 State Machine Interface

- **Interface:** Internal sensor state management
- **Usage:** Manage sensor state transitions
- **Implementation:** Private to Sensor Manager

## 7. Static View

### 7.1 Component Structure

```mermaid
graph TB
    subgraph SensorManager["Sensor Manager"]
        AcqScheduler[Acquisition Scheduler]
        SensorStateMgr[Sensor State Manager]
        FilterEngine[Filter Engine]
        DataRecordGen[Data Record Generator]
        FaultDetector[Fault Detector]
    end
    
    subgraph SensorDrivers["Sensor Drivers"]
        TempDriver[Temperature Driver]
        HumidityDriver[Humidity Driver]
        CO2Driver[CO2 Driver]
        NH3Driver[NH3 Driver]
        VOCDriver[VOC Driver]
        PMDriver[PM Driver]
        LightDriver[Light Driver]
    end
    
    subgraph External["External Components"]
        EventSys[Event System]
        TimeUtils[Time Utils]
        MCMgr[MC Manager]
        ErrorHandler[Error Handler]
        Logger[Logger]
    end
    
    AcqScheduler --> SensorDrivers
    AcqScheduler --> FilterEngine
    FilterEngine --> DataRecordGen
    DataRecordGen --> TimeUtils
    DataRecordGen --> EventSys
    SensorStateMgr --> EventSys
    FaultDetector --> ErrorHandler
    SensorManager --> MCMgr
    SensorManager --> Logger
```

### 7.2 Sensor Type Mapping

```mermaid
graph LR
    subgraph PhysicalSlots["Physical Sensor Slots"]
        Slot0[Slot 0<br/>Temperature]
        Slot1[Slot 1<br/>Humidity]
        Slot2[Slot 2<br/>CO2]
        Slot3[Slot 3<br/>NH3]
        Slot4[Slot 4<br/>VOC]
        Slot5[Slot 5<br/>PM]
        Slot6[Slot 6<br/>Light]
    end
    
    subgraph SensorManager["Sensor Manager"]
        SensorArray[Sensor Array<br/>sensor_instance_t[7]]
    end
    
    subgraph SensorDrivers["Sensor Drivers"]
        DriverArray[Driver Interface Array<br/>sensor_driver_t[7]]
    end
    
    Slot0 --> SensorArray
    Slot1 --> SensorArray
    Slot2 --> SensorArray
    Slot3 --> SensorArray
    Slot4 --> SensorArray
    Slot5 --> SensorArray
    Slot6 --> SensorArray
    
    SensorArray --> DriverArray
```

## 8. Dynamic View

### 8.1 Sensor Acquisition Cycle Sequence

```mermaid
sequenceDiagram
    participant Timer as Acquisition Timer
    participant SM as Sensor Manager
    participant Driver as Sensor Driver
    participant Filter as Filter Engine
    participant TimeUtil as Time Utils
    participant EventSys as Event System
    
    Note over Timer,EventSys: 1-Second Acquisition Cycle
    
    Timer->>SM: acquisitionCycleStart()
    
    loop For each enabled sensor (0-6)
        SM->>SM: checkSensorState(sensor_id)
        
        alt Sensor is healthy and enabled
            loop 10 samples
                SM->>Driver: readSensor(sensor_id)
                Driver-->>SM: raw_sample
                SM->>SM: validateSample(raw_sample)
            end
            
            SM->>Filter: applyFilter(raw_samples, filter_config)
            Filter-->>SM: filtered_value
            
            SM->>TimeUtil: getCurrentTimestamp()
            TimeUtil-->>SM: timestamp
            
            SM->>SM: createDataRecord(sensor_id, filtered_value, timestamp)
            SM->>EventSys: publish(SENSOR_DATA_UPDATE, record)
            
        else Sensor is faulty or disabled
            SM->>SM: skipSensor(sensor_id)
        end
    end
    
    SM->>SM: updateAcquisitionStatistics()
    SM->>EventSys: publish(ACQUISITION_CYCLE_COMPLETE)
    
    Note over Timer,EventSys: Next cycle in 1 second
```

### 8.2 Sensor State Management Sequence

```mermaid
sequenceDiagram
    participant SM as Sensor Manager
    participant Driver as Sensor Driver
    participant EventSys as Event System
    participant ErrorHandler as Error Handler
    participant MCMgr as MC Manager
    
    Note over SM,MCMgr: Sensor Detection and Initialization
    
    SM->>Driver: detectSensorPresence(sensor_id)
    Driver-->>SM: presence_detected
    
    alt Sensor newly detected
        SM->>SM: transitionState(UNKNOWN -> DETECTED)
        SM->>Driver: initializeSensor(sensor_id)
        Driver-->>SM: init_result
        
        alt Initialization successful
            SM->>SM: transitionState(DETECTED -> INITIALIZED)
            SM->>MCMgr: getSensorConfig(sensor_id)
            MCMgr-->>SM: sensor_config
            SM->>SM: applySensorConfig(sensor_config)
            SM->>SM: transitionState(INITIALIZED -> ENABLED)
            SM->>EventSys: publish(SENSOR_STATE_CHANGED, state_info)
            
        else Initialization failed
            SM->>SM: transitionState(DETECTED -> UNKNOWN)
            SM->>ErrorHandler: reportFault(SENSOR_INIT_FAILED)
        end
        
    else Sensor fault detected during operation
        SM->>SM: transitionState(ENABLED -> FAULTY)
        SM->>ErrorHandler: reportFault(SENSOR_COMMUNICATION_FAILED)
        SM->>EventSys: publish(SENSOR_FAULT_DETECTED, fault_info)
        
        Note over SM,MCMgr: Schedule recovery attempt
        SM->>SM: scheduleRecoveryAttempt(sensor_id, delay_ms)
        
    else Sensor removed
        SM->>SM: transitionState(current -> REMOVED)
        SM->>EventSys: publish(SENSOR_REMOVED, sensor_info)
    end
```

### 8.3 High-Frequency Sampling and Filtering

```mermaid
sequenceDiagram
    participant SM as Sensor Manager
    participant Driver as Sensor Driver
    participant Filter as Filter Engine
    participant Validator as Data Validator
    
    Note over SM,Validator: High-Frequency Sampling (10 samples)
    
    SM->>SM: startSampling(sensor_id)
    
    loop 10 samples
        SM->>Driver: readSensorValue(sensor_id)
        Driver-->>SM: raw_value
        SM->>Validator: validateRange(raw_value, min, max)
        
        alt Value in valid range
            Validator-->>SM: valid
            SM->>SM: addToSampleBuffer(raw_value)
        else Value out of range
            Validator-->>SM: invalid
            SM->>SM: incrementOutlierCount()
        end
        
        SM->>SM: delay(sampling_interval_ms)
    end
    
    SM->>Filter: processBuffer(sample_buffer, filter_type)
    
    alt Median Filter
        Filter->>Filter: sortSamples()
        Filter->>Filter: selectMedian()
    else Moving Average Filter
        Filter->>Filter: calculateAverage()
        Filter->>Filter: applySmoothing()
    else Rate Limited Filter
        Filter->>Filter: checkRateOfChange()
        Filter->>Filter: applyRateLimit()
    end
    
    Filter-->>SM: filtered_value
    SM->>SM: calculateStatistics(sample_buffer)
```

## 9. Interface Definitions

### 9.1 Data Types

```c
// Sensor Types
typedef enum {
    SENSOR_TYPE_TEMPERATURE = 0,
    SENSOR_TYPE_HUMIDITY,
    SENSOR_TYPE_CO2,
    SENSOR_TYPE_NH3,
    SENSOR_TYPE_VOC,
    SENSOR_TYPE_PM,
    SENSOR_TYPE_LIGHT,
    SENSOR_TYPE_COUNT
} sensor_type_t;

// Sensor States
typedef enum {
    SENSOR_STATE_UNKNOWN = 0,      // Initial state, not yet detected
    SENSOR_STATE_DETECTED,         // Sensor presence confirmed
    SENSOR_STATE_INITIALIZED,      // Driver loaded and configured
    SENSOR_STATE_ENABLED,          // Active data acquisition
    SENSOR_STATE_DISABLED,         // Present but not acquiring data
    SENSOR_STATE_FAULTY,           // Detected failure condition
    SENSOR_STATE_REMOVED,          // Previously present, now absent
    SENSOR_STATE_CALIBRATING,      // Calibration in progress
    SENSOR_STATE_COUNT
} sensor_state_t;

// Data Validity Status
typedef enum {
    DATA_VALIDITY_VALID = 0,
    DATA_VALIDITY_INVALID_RANGE,
    DATA_VALIDITY_INVALID_TIMEOUT,
    DATA_VALIDITY_INVALID_COMMUNICATION,
    DATA_VALIDITY_INVALID_CALIBRATION,
    DATA_VALIDITY_INVALID_OUTLIER
} data_validity_t;

// Sensor Data Record
typedef struct {
    uint8_t sensor_id;              // Sensor identifier (0-6)
    sensor_type_t sensor_type;      // Type of sensor
    float filtered_value;           // Processed sensor value
    char unit[8];                   // Unit of measurement (e.g., "°C", "%RH")
    uint64_t timestamp_ms;          // Timestamp in milliseconds
    data_validity_t validity;       // Data validity status
    uint16_t sample_count;          // Number of samples used for filtering
    float raw_min, raw_max;         // Min/max of raw samples
    float raw_stddev;               // Standard deviation of raw samples
    uint32_t acquisition_time_us;   // Time taken for acquisition (microseconds)
} sensor_data_record_t;

// Sensor Configuration
typedef struct {
    uint16_t sampling_count;        // Number of samples per cycle (5-20)
    uint32_t sampling_interval_ms;  // Interval between samples
    filter_type_t filter_type;      // Filter algorithm to use
    filter_params_t filter_params;  // Filter-specific parameters
    float min_valid_value;          // Minimum valid sensor value
    float max_valid_value;          // Maximum valid sensor value
    float rate_limit_per_sec;       // Maximum rate of change per second
    bool enable_outlier_rejection;  // Enable outlier detection
    float outlier_threshold;        // Outlier detection threshold (std devs)
    uint32_t recovery_delay_ms;     // Delay before recovery attempt
    uint8_t max_consecutive_failures; // Max failures before marking faulty
} sensor_config_t;

// Filter Types and Parameters
typedef enum {
    FILTER_TYPE_NONE = 0,           // No filtering (use raw average)
    FILTER_TYPE_MEDIAN,             // Median filter
    FILTER_TYPE_MOVING_AVERAGE,     // Moving average filter
    FILTER_TYPE_RATE_LIMITED,       // Rate-of-change limiter
    FILTER_TYPE_COMBINED,           // Combination of filters
    FILTER_TYPE_COUNT
} filter_type_t;

typedef struct {
    union {
        struct {
            uint8_t window_size;    // Window size for median filter
        } median;
        struct {
            uint8_t window_size;    // Window size for moving average
            float alpha;            // Exponential smoothing factor
        } moving_avg;
        struct {
            float max_rate;         // Maximum rate of change per second
            float recovery_time;    // Time to recover from rate limiting
        } rate_limit;
    };
} filter_params_t;

// Sensor Statistics
typedef struct {
    uint32_t total_acquisitions;    // Total number of acquisition cycles
    uint32_t successful_acquisitions; // Successful acquisitions
    uint32_t failed_acquisitions;   // Failed acquisitions
    uint32_t timeout_count;         // Number of timeouts
    uint32_t outlier_count;         // Number of outliers detected
    float avg_acquisition_time_ms;  // Average acquisition time
    float max_acquisition_time_ms;  // Maximum acquisition time
    float min_value, max_value;     // Min/max values recorded
    float avg_value;                // Average value
    uint64_t last_acquisition_time; // Timestamp of last acquisition
    uint32_t consecutive_failures;  // Current consecutive failure count
    sensor_state_t current_state;   // Current sensor state
} sensor_stats_t;

// Acquisition Performance Metrics
typedef struct {
    uint32_t total_cycles;          // Total acquisition cycles
    uint32_t successful_cycles;     // Successful cycles
    uint32_t failed_cycles;         // Failed cycles
    float avg_cycle_time_ms;        // Average cycle time
    float max_cycle_time_ms;        // Maximum cycle time
    uint8_t active_sensor_count;    // Number of active sensors
    uint8_t faulty_sensor_count;    // Number of faulty sensors
    uint32_t memory_usage_bytes;    // Current memory usage
} acquisition_metrics_t;
```

### 9.2 Configuration Constants

```c
// Sensor Configuration
#define SENSOR_COUNT                7       // Total number of sensor slots
#define SENSOR_ID_ALL              0xFF     // Special ID for all sensors
#define DEFAULT_SAMPLING_COUNT      10      // Default samples per cycle
#define DEFAULT_SAMPLING_INTERVAL   50      // Default interval between samples (ms)
#define MAX_SAMPLING_COUNT          20      // Maximum samples per cycle
#define MIN_SAMPLING_COUNT          5       // Minimum samples per cycle

// Timing Configuration
#define ACQUISITION_CYCLE_PERIOD    1000    // Acquisition cycle period (ms)
#define MAX_ACQUISITION_TIME        800     // Maximum time per cycle (ms)
#define SENSOR_TIMEOUT              100     // Individual sensor timeout (ms)
#define RECOVERY_DELAY_DEFAULT      5000    // Default recovery delay (ms)

// Memory Configuration
#define SENSOR_DATA_HISTORY_SIZE    10      // Number of historical records per sensor
#define SAMPLE_BUFFER_SIZE          20      // Maximum samples per sensor
#define SENSOR_NAME_MAX_LENGTH      16      // Maximum sensor name length
```

## 10. Assumptions and Constraints

### 10.1 Assumptions

- **Sensor Hardware Compatibility:** All sensors are compatible with their assigned slots
- **Driver Availability:** Sensor drivers are available and functional
- **Timing Accuracy:** System timer provides accurate 1-second intervals
- **Memory Availability:** Sufficient memory for sensor data buffers and state
- **Configuration Validity:** Machine Constants provide valid sensor configurations

### 10.2 Constraints

- **Acquisition Timing:** Complete all sensor acquisition within 800ms per cycle
- **Memory Usage:** Total memory usage limited to 32KB
- **CPU Usage:** Maximum 20% of available CPU time
- **Sensor Count:** Maximum 7 sensors (fixed hardware slots)
- **Sample Count:** 5-20 samples per sensor per cycle

### 10.3 Design Constraints

- **No Dynamic Memory:** Use pre-allocated buffers for sensor data
- **Deterministic Timing:** All operations must have bounded execution time
- **State Persistence:** Sensor states must survive system resets
- **Thread Safety:** All public interfaces must be thread-safe

## 11. Traceability

### 11.1 System Requirements

- **SR-DAQ-001:** Multi-sensor support for 7 environmental sensor types
- **SR-DAQ-002:** High-frequency sampling (minimum 10 samples per cycle)
- **SR-DAQ-003:** Local data filtering with configurable algorithms
- **SR-DAQ-004:** Timestamped data generation with ±1 second accuracy
- **SR-DAQ-005:** Sensor state management and lifecycle control

### 11.2 Software Requirements

- **SWR-DAQ-001 to SWR-DAQ-015:** Complete sensor data acquisition implementation
- **SWR-DQC-001 to SWR-DQC-018:** Data quality and calibration requirements
- **SWR-PERF-001:** Acquisition cycle timing constraints (100ms per sensor)

### 11.3 Features

- **F-DAQ-01:** Multi-Sensor Data Acquisition
- **F-DAQ-02:** High-Frequency Sampling and Local Filtering
- **F-DAQ-03:** Timestamped Sensor Data Generation
- **F-DQC-01:** Automatic Sensor Detection
- **F-DQC-02:** Sensor Type Enforcement
- **F-DQC-03:** Sensor Failure Detection

### 11.4 Cross-Feature Constraints

- **CFC-TIME-01:** Non-blocking operation
- **CFC-TIME-02:** Deterministic behavior with bounded timing
- **CFC-ARCH-02:** State-aware execution (respects system states)

---

**Document Status:** Final for Implementation  
**Dependencies:** Sensor Drivers, Event System, Time Utils, MC Manager, Error Handler  
**Next Review:** After component implementation and integration testing