Development Log

Development Log

This page tracks the day-to-day progress of the SecureEdgePlatform / SensorSimulator project.
Each entry documents what was done and what was learned.

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2025-09-26

✅ Achievements

• Refactored CMake project structure:
  • Introduced sensor_impl library to share code between executables and tests.
  • Moved main() out of EdgeShell.cpp into a new src/main_shell.cpp file.
• Fixed critical ownership issue:
  • Sensors are now stored once in sensors_ (as std::unique_ptr<ISensor>).
  • Scheduler receives only a raw pointer (ISensor*) to avoid double ownership.
  • Resolved segmentation fault during real-time simulation (run command).
• Added template helper getScheduledSensorAs<T> in SensorScheduler for safe downcasting.
• Implemented case-insensitive handling for sensor IDs (TEMP, PRES, etc.).
• Wrote new Catch2 unit tests (tests/test_cli.cpp):
  • Adding TEMP sensor
  • Adding PRES sensor
  • Rejecting unsupported sensor types
  • Case-insensitive ID handling
    → All tests are now passing ✅

🔍 Lessons Learned

• Importance of single ownership with unique_ptr and raw pointer handover.
• How splitting logic into libraries (sensor_impl) prevents duplicate main() issues in tests.
• Practical usage of dynamic_cast and templates for polymorphic access.

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2025-09-27

✅ Achievements

• Implemented stop() API in EdgeShell with std::condition_variable and std::mutex to safely halt the real-time loop.
• Updated RunCommand to use cv_.wait_for for cooperative waiting.
• Simplified StopCommand to directly invoke EdgeShell::stop().
• Extended CLI output: stepSensor and tick loop now print sensor IDs alongside values.
• Wrote integration tests (tests/test_cli.cpp) simulating REPL input via std::istringstream and redirected std::cin/std::cout to validate run/stop flows without blocking.
• Removed deprecated EdgeCLI menu-based interface.
• Added a comprehensive README.md for the SensorSimulator module.
• Cleaned up repo (removed accidental .DS_Store from version control).

🔍 Lessons Learned

• Testing REPL applications requires simulating std::cin / std::cout streams; otherwise tests block indefinitely.
• condition_variable is the right way to cooperatively control background threads (run / stop) in a CLI-driven simulation.
• Documentation (README) not only improves onboarding but also serves as a checkpoint for architectural clarity.
• Removing obsolete code (EdgeCLI) helps keep the project lean and focused.

(End of entry — new logs will be appended below with dates.)