Packet Encoding Format

Figure 1: Frame format.

For an architectural overview of Serialized Bluetooth Application, please see the Architecture module.

Commands and responses

Figure 2: Command and Response packet course.

Packet Type	Description
0x00 Command	The packet is sent from the application chip to the BLE Connectivity Chip, where it will be decoded and the corresponding function in the SoftDevice is executed.
0x01 Command Response	After a function in the SoftDevice is received, the response is encoded in the BLE Connectivity Chip and a response packet is sent to the application chip.
0x03 DTM Command	The packet is sent from the application chip to the BLE Connectivity Chip, where it will be decoded and the chip will enter in the DTM mode.
0x04 DTM Command Response	Before BLE Connectivity Chip enter in the DTM mode it sends response packet to the application chip.

Note: If the length field is invalid for the specific command, the call will return error code NRF_ERROR_INVALID_LENGTH from the codec in the Application Chip.

Events

Figure 3: Event packet course.

Packet Type	Description
0x02 Event	If an event is triggered in the SoftDevice, an event packet is is sent from the BLE Connectivity Chip to the application chip.

BLE S120 Events

BLE S120 GAP Events

BLE S120 GATTC Events

BLE S120 GATTS Events

BLE S120 L2CAP Events

BLE S120 Functions

BLE S120 GAP Functions

BLE S120 GATTC Functions

BLE S120 GATTS Functions

BLE S120 L2CAP Functions

BLE DTM