BLE Service Map
Custom characteristics for activity data and device status.
BLE Fitness Tracker Prototype
Custom BLE services with low-power firmware and a lightweight mobile companion app.
Focus
Power optimization, streaming
Impact
Extended battery life with optimized sleep and sampling profiles.
Stack
nRF52BLEFreeRTOSC/C++
Timeline
A structured view of the phases and decisions that shaped the outcome.
Discovery
Defined activity capture goals and data transport requirements.
Prototype
Built custom BLE services and refined the power model.
Validation
Measured battery usage and tuned sampling intervals.
Diagrams
Key systems and data flows that framed the implementation.
Power Profile
Sampling and sync windows aligned to battery constraints.
Evidence
Evaluation-focused summary of security, reliability, and testing evidence.
Security & Provisioning
OTA & Reliability
Validation & Testing
- Increased runtime with optimized sleep states.
- Reduced packet retries through improved link tuning.
- Delivered a foundation for a production roadmap.