Event packet encoding

Frame format encoding of the BLE_GAP_EVT_CONN_PARAM_UPDATE packet.

Event ID = 0x12 for BLE_GAP_EVT_CONN_PARAM_UPDATE

All BLE Events, ble_evt_t, are encoded with the header ble_evt_hdr_t first, containing only the 'Event ID', followed by the event. The 'Event Length' will not be encoded as the size of the event could be of different sizes depending on decoder architecture.

The BLE GAP event contains a connection handle, and for the BLE GAP Connect Parameter Update event, the ble_gap_evt_conn_param_update_t is encoded after connection handle as seen in Figure 1.

The order of the encoding is:

- 2 bytes:		Connection Handle
- 8 bytes:	ble_gap_conn_params_t	GAP Connection Parameters (See Figure 1 for details on encoding)

Encoding of GAP Connection Parameter Update event

Figure 1: Encoding of GAP Connection Parameter Update event.