Function packet format

Frame format encoding of the sd_ble_gatts_sys_attr_set packet.

Operation Code = 0xA9 (169) for sd_ble_gatts_sys_attr_set, see BLE_GATTS_SVCS.

The parameters provided as input to sd_ble_gatts_sys_attr_set are encoded in the following order:

- 1 byte:		Operation Code, Value = 0xA9 (169)
- 2 bytes:		Connection Handle
- 1 byte:		System Attributes Present
		0x00 if System Attributes is a NULL pointer
		0x01 otherwise
- 2 bytes:		Conditional: Length of System Attributes Data
- 0 ... n bytes		Conditional: System Attributes Data
		The number, n, of bytes encoded is defined in the System Attributes Data Length field.

Figure 1: Packet format for sd_ble_gatts_sys_attr_set function.

Response packet format

Frame format encoding of the sd_ble_gatts_sys_attr_set response packet.

In case of an error, the following data is encoded:

- 1 byte:		Operation Code, Value = 0xA9 (169)
- 4 byte:		nRF Error Code

Figure 2: Packet format for sd_ble_gatts_sys_attr_set error response.

In case of a successful command, i.e. 'nRF Error Code' = NRF_SUCCESS, the following data is encoded:

- 1 byte:		Operation Code, Value = 0xA9 (169)
- 4 bytes:		nRF Error Code

Figure 3: Packet format for sd_ble_gatts_sys_attr_set success response.