* TEAM MEMBERS
* Sudharshan Ramesh - sr7431
* Zhixiang Zhou - zz4819
* Junhao Zhu - jz7244
Evaluation of Embedded Sentry Code against Grading Criteria:
1. Ability to successfully achieve the objectives:
- The code uses data collected from an onboard accelerometer/gyro to record and match hand movement sequences.
- A "Record Key" functionality is implemented with `RECORDING_FLAG` to indicate the start and end of sequence recording.
- A visual LED-based indication system (green for unlocked, red for locked) ensures the status of the lock is clearly visible.
- The unlock process checks recorded sequences against new gestures using correlation with a defined threshold (CORRELATION_THRESHOLD).
2. Repeatability and robustness of unlock sequence:
- The `correlation` function computes the similarity of gestures, ensuring only closely matching sequences are accepted.
- A cleaning function (`clean_Track`) removes noise from raw gyroscope data to improve robustness.
- Tolerances are controlled via the correlation threshold (`CORRELATION_THRESHOLD`), balancing security and usability.
- More details are elaborated in the video.
3. Ease of use:
- User interaction is intuitive, with clear visual feedback via LEDs and an LCD interface.
- Graphical elements like "lock" and "unlock" icons provide an accessible user interface.
- Interrupt-based controls for starting/stopping recordings and unlocking reduce user error.
4. Creativity:
- The project allows users to record gestures for their preferred time period rather than fixed time.
- The project combines gesture recognition and embedded graphics to create an interactive locking system.
- The visual design and LED-based indications add a layer of user-friendly interaction.
- The implementation of gesture-controlled unlocking is a novel application of the IMU.
5. Well-written code:
- The code is modular and follows clear separation of concerns, with dedicated functions for data processing, graphics, and core logic.
- Code comments explain the purpose of major functions, enhancing readability and maintainability.
- The use of well-defined flags (e.g., RECORDING_FLAG, UNLOCK_FLAG) simplifies state management.
6. Complexity:
- Advanced techniques such as correlation calculation and data normalization are used for sequence matching.
- Multiple threads handle LCD updates, LED indications, and accelerometer data processing concurrently, showcasing an understanding of multitasking.
- The project involves intricate hardware interactions, including LCD, touch input, and gyroscope data integration.