2.7.5.2.3 Service Discovery
After the successful connection, a request will be sent to determine the supported
service and characteristic. The format of the request frame is
ATT_READ_BY_GROUP_TYPE_REQ. To this frame, a response frame will be
sent that contains the supported service/characteristics information. The frame format
is ATT_READ_BY_GROUP_TYPE_RESP. This packet is grouped under the
ATT tab.
The following figure represents the service request inquiry and response frame. The RNBD451 module supports the following
services:
- Generic Access Profile/Generic Attribute Profile
- Transparent UART Profile Service (represented as Unknown UUID[0x5343]
- Device information service
- OTA profile service (represented as Unknown UUID[0x4850]
