espressif/esp-nimble
Nov 2025 – Feb 2026
3 Months active
Languages Used
C
Technical Skills
Bluetooth Low EnergyC programmingembedded systemsBluetooth Low Energy (BLE)memory management
cjin
PROFILE
Cjin
Worked on the espressif/esp-nimble repository, delivering targeted improvements to the Bluetooth Low Energy (BLE) stack using C and embedded systems expertise. Addressed a critical bug by restructuring periodic advertising data handling to respect BLE HCI size limits, reducing runtime errors and improving reliability. Developed extended advertising features with constant Device ID and enhanced scan filtering, enabling more precise device identification and privacy controls. Refactored memory pool management by removing legacy code and implementing robust unregistration during deinitialization, which improved maintainability and stability. The work demonstrated careful attention to modularity, memory management, and protocol compliance within a complex embedded environment.
Overall Statistics
Feature vs Bugs
67%Features
Repository Contributions
4Total
Bugs
1
Commits
4
Features
2
Lines of code
1,416
Activity Months3
Your Network
230 peopleSame Organization
@espressif.com209
Work History
February 2026
2 Commits • 1 Features
Feb 1, 2026February 2026 monthly summary for espressif/esp-nimble: Key feature delivered: Memory Pool Management Refactor and Robust Unregistration in BLE stack. This work removes legacy memory pool code to enable a modular architecture, improving maintainability and potential performance, and adds robust unregistration of memory pools during deinitialization to prevent memory trampling and enhance stability.
2 Commits • 1 Features
Feb 1, 2026February 2026 monthly summary for espressif/esp-nimble: Key feature delivered: Memory Pool Management Refactor and Robust Unregistration in BLE stack. This work removes legacy memory pool code to enable a modular architecture, improving maintainability and potential performance, and adds robust unregistration of memory pools during deinitialization to prevent memory trampling and enhance stability.
February 2026
December 2025
1 Commits • 1 Features
Dec 1, 2025December 2025: Delivered BLE improvements in espressif/esp-nimble by implementing Extended Advertising with a constant Device ID (DID) and enhanced scan filtering. This feature provides precise advertising/scanning control, improves device identification and privacy, and increases data collection efficiency for BLE applications. The work is trackable via a dedicated commit and APIs for configuring DID and ADI scan filters, enabling repeatable deployments and easier maintenance.
December 2025
1 Commits • 1 Features
Dec 1, 2025December 2025: Delivered BLE improvements in espressif/esp-nimble by implementing Extended Advertising with a constant Device ID (DID) and enhanced scan filtering. This feature provides precise advertising/scanning control, improves device identification and privacy, and increases data collection efficiency for BLE applications. The work is trackable via a dedicated commit and APIs for configuring DID and ADI scan filters, enabling repeatable deployments and easier maintenance.
November 2025
1 Commits
Nov 1, 2025November 2025: Delivered a targeted bug fix in espressif/esp-nimble to guarantee periodic advertising data stays within the BLE HCI 255-byte limit, eliminating subevent data overflow and improving reliability of advertising in the BLE stack. The fix was implemented with careful data chunking and transmission within HCI commands, reducing runtime errors and support triage related to periodic advertising.
1 Commits
Nov 1, 2025November 2025: Delivered a targeted bug fix in espressif/esp-nimble to guarantee periodic advertising data stays within the BLE HCI 255-byte limit, eliminating subevent data overflow and improving reliability of advertising in the BLE stack. The fix was implemented with careful data chunking and transmission within HCI commands, reducing runtime errors and support triage related to periodic advertising.
November 2025
Activity
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Quality Metrics
Correctness90.0%
Maintainability85.0%
Architecture85.0%
Performance80.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
C
Technical Skills
Bluetooth Low EnergyBluetooth Low Energy (BLE)C programmingembedded systemsmemory management
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