AndroidOS seems to treat Gatt Status as an 8 bit number, rather than 16

RE: AndroidOS seems to treat Gatt Status as an 8 bit number, rather than 16

goldwake — Thu, 23 May 2019 21:30:29 GMT

Thanks Hung Bui, that's realy helpful

Hung Bui — Thu, 23 May 2019 12:25:21 GMT

Hi,

Please be aware that the gatt_status (BLE_GATT_STATUS_CODES) in our stack is not directly matched to the ATT error codes defined in Bluetooth spec.

The expected error code for a read request is defined by the spec as follow (Bluetooth v5.0 spec):

As you can find in your case you should return "Read Not Permitted" , this is matched with our message sequence chart of the function usage here:

So, please use BLE_GATT_STATUS_ATTERR_READ_NOT_PERMITTED as the return status.

goldwake — Thu, 23 May 2019 01:57:52 GMT

I've found android gatt_api.h file which contains

typedef UINT8 tGATT_STATUS;

looks like it definitely is being treated as an 8bit number