360e04fa36
* BLERemoteChar: fix descriptor 2902 write for characteristic notifications When registering a notification on a characteristic, the 2902 descriptor (CCCD) value is set to 1 (or 2 for indication). According to the BLUETOOTH CORE SPECIFICATION Version 5.2, Revision Date 2019-12-31, section 4.12.3 "Write Characteristic Descriptors" (page 1588), the characteristic descriptor write must expect a response. Currently, the descriptor write is performed without expecting a reponse, which prevents the notification to be functional with some BLE stacks. This commit modify the write to expect the response. Signed-off-by: Jimmy Durand Wesolowski <jimmy.durand.wesolowski@commsolid.com> * BLERemoteChar: forward GATT client event to characteristic descriptors This commits prevents a permanent wait when calling BLERemoteDescriptor readValue function, on the m_semaphoreReadDescrEvt semaphore. ESP32 BLE stack calls to remote characteristic - notification, - value read - value write and remote characteristic descriptor - value read are asynchronous. When such a call is performed by this library, a semaphore is taken prior to the BLE stack read or write operation, and waited on after it. Releasing the semaphore is done by the characteristic event handling function (gattClientEventHandler), when the appropriate event is received. However, the characteristic descriptor events are discarded, and the value read semaphore is never released. This commits forwards the GATT client events from the remote characteristic down to their remote characteristic descriptor, and implements their event handling. Adding a semaphore for the remote characteristic descriptor value write will be done in a separate commit. Signed-off-by: Jimmy Durand Wesolowski <jimmy.durand.wesolowski@commsolid.com> * BLERemoteDescriptor: add semaphore to characteristic descriptor write This adds a semaphore to characteristic descriptor value write, to mimic the value read function, and to ensure completion of the operation before we carry on. Signed-off-by: Jimmy Durand Wesolowski <jimmy.durand.wesolowski@commsolid.com> Co-authored-by: Jimmy Durand Wesolowski <jimmy.durand.wesolowski@commsolid.com> |
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ESP32 BLE for Arduino
The Arduino IDE provides an excellent library package manager where versions of libraries can be downloaded and installed. This Github project provides the repository for the ESP32 BLE support for Arduino.
The actual source of the project which is being maintained can be found here:
https://github.com/nkolban/esp32-snippets
Issues and questions should be raised here:
https://github.com/nkolban/esp32-snippets/issues
Documentation for using the library can be found here:
https://github.com/nkolban/esp32-snippets/tree/master/Documentation