This information applies to the following SoftDevices: S130, S132
Packet Encoding Format
Figure 1: Frame format.
For an architectural overview of Serialized Bluetooth Application, 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. |
See BLE S13x Functions for detailed information about functions and responses.
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. |
See BLE S13x Events for detailed information about events.