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Health Monitoring Alerts - Implementation Verification

Task 17: Implement health monitoring alerts

Implementation Summary

Successfully implemented health monitoring alerts with threshold checking for temperature, voltage, and accelerometer data.

Changes Made

1. Server-Side Changes (MessageTypeHandlers.js)

Added four new message type handlers:

  • TemperatureHandler:

    • Calculates average temperature from 4 sensors
    • Threshold: > 60°C triggers error badge
    • Color: badge-error (red) when high, badge-success (green) when normal

  • SupplyVoltageHandler:

    • Uses mean supply voltage
    • Normal range: 12-18V
    • Color: badge-warning (yellow) when out of range, badge-success when normal

  • CPUDataHandler:

    • Displays CPU load percentage
    • No threshold checking (as per requirements)
    • Color: badge-info (blue)

  • AccelerometerHandler:

    • Calculates magnitude: sqrt(x² + y² + z²)
    • Threshold: > 2g triggers error badge
    • Color: badge-error (red) when high, badge-success (green) when normal

2. StateAggregator.js Updates

  • Imported new handlers
  • Registered handlers for message types: Temperature, SupplyVoltage, CPUData, Accelerometer

3. UI Changes (Dashboard.jsx)

Updated System Health section to display visual alerts:

  • Temperature:

    • Red ring border when > 60°C
    • Red text color for value
    • "HIGH" badge indicator

  • Voltage:

    • Yellow ring border when outside 12-18V range
    • Yellow text color for value
    • "OUT OF RANGE" badge indicator

  • Accelerometer:

    • Red ring border when > 2g
    • Red text color for value
    • "⚠ WARNING" badge indicator

  • CPU Load: No highlighting (no threshold specified)

Testing

All unit tests pass (38 tests total):

  • ✓ Temperature handler with normal and high values
  • ✓ Voltage handler with normal, low, and high values
  • ✓ CPU load handler
  • ✓ Accelerometer handler with normal and high values
  • ✓ StateAggregator integration for all new handlers

Requirements Validated

  • ✓ Requirement 7.4: Temperature threshold checking (> 60°C)
  • ✓ Requirement 7.5: Voltage range checking (12-18V)
  • ✓ Requirement 8.3: Accelerometer threshold checking (> 2g)

Visual Indicators

The UI now provides clear visual feedback:

  1. Ring borders around stat cards when thresholds are exceeded
  2. Color-coded text for values (red for errors, yellow for warnings)
  3. Badge indicators with descriptive text (HIGH, OUT OF RANGE, WARNING)

Manual Testing Steps

To verify the implementation:

  1. Start the Fastify server: npm run start:fastify
  2. Start the frontend: npm run dev
  3. Send test telemetry messages with:
    • Temperature > 60°C (should show red highlighting)
    • Voltage < 12V or > 18V (should show yellow highlighting)
    • Accelerometer magnitude > 2g (should show red highlighting)
  4. Verify the System Health section displays appropriate visual alerts

Notes

  • The implementation follows DaisyUI badge color conventions
  • Thresholds are configurable in the handler classes
  • The UI gracefully handles missing data (displays "-" with info color)
  • All existing tests continue to pass