Luís Marques Silva

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9 years, 1 month ago.

BLE_API how to add descriptors to characteristics?

Hello.

I've analysing the examples (HeartRateService, et al) and trying to add a descriptor do the Heart Rate characteristic, but without success.

I've tried to create an attribute with:

GattCharacteristic::PresentationFormat format;
...
GattAttribute(BLE_UUID_DESCRIPTOR_CHAR_PRESENTATION_FORMAT, (uint8_t*)format);

And then save this attribute in an array, which I then pass to the hrmRate GattCharacteristic constructor.

One weird thing that happened: by doing this the board actually stopped advertising the 3 characteristics of the Heart Rate service, and started to only show the 1 (the heart rate characteristic).

Are there any examples of how to accomplish this?

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