Refactor notify/indicate #381
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Pull Request Overview
This PR refactors the notification and indication handling in NimBLE to improve efficiency and throughput by tracking client subscription state locally and sending data directly rather than relying on the stack to read values.
Key Changes
- Adds client subscription state tracking via
SubPeerEntrystructure inNimBLECharacteristicwith flags for subscription type and security status - Refactors
sendValue()to send notifications/indications directly using copied data with retry logic (up to 10ms) for buffer allocation failures - Introduces new
getCharacteristicByHandle()lookup method and streamlines event handling inNimBLEServerfor subscribe and notify_tx events
Reviewed Changes
Copilot reviewed 4 out of 4 changed files in this pull request and generated 6 comments.
| File | Description |
|---|---|
| src/NimBLEServer.h | Adds getCharacteristicByHandle() method declaration and reorganizes private method declarations |
| src/NimBLEServer.cpp | Implements characteristic lookup, fixes typo and bug in getPeerInfo(), refactors subscribe/notify_tx event handling to use new subscription tracking |
| src/NimBLECharacteristic.h | Defines SubPeerEntry struct for tracking subscriber state, adds subscription management methods, and new onStatus() callback overload with NimBLEConnInfo |
| src/NimBLECharacteristic.cpp | Refactors notify/indicate to send data directly, implements subscription request processing and peer status updates with critical section protection |
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This refactors the handling of sending notifications and indications for greater efficiency. * Adds client subscription state tracking to NimBLECharacteristic rather than relying on the stack. * Notifications/indications are now sent directly, no longer calling the callback to read the values. This avoids delays and flash writes in the stack, allowing for greater throughput.
Adds a new overloaded callback to NimBLECharacteristicCallbacks for the notification/indication onStatus method that provides a NimBLEConnInfo reference.
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This refactors the handling of sending notifications and indications for greater efficiency.