Connecting Procedure APIs

This group includes connections APIs.

Functions
at_ble_status_t	at_ble_conn_update_reply (at_ble_handle_t handle, bool accept, uint16_t ce_len_min, uint16_t ce_len_max)
	Reply to connection parameters update request AT_BLE_CONN_PARAM_UPDATE_REQUEST. More...
at_ble_status_t	at_ble_connect (at_ble_addr_t peers[], uint8_t peer_count, uint16_t scan_interval, uint16_t scan_window, at_ble_connection_params_t *connection_params)
	Connect to a peer device. More...
at_ble_status_t	at_ble_connect_cancel (void)
	Cancels an ongoing connection attempt. More...
at_ble_status_t	at_ble_connection_param_update (at_ble_handle_t handle, at_ble_connection_params_t *connection_params)
	Update the connection parameters of an ongoing connection. More...
at_ble_status_t	at_ble_disconnect (at_ble_handle_t handle, at_ble_disconnect_reason_t reason)
	Disconnect a connected peer device and receive response through AT_BLE_DISCONNECTED event. More...
at_ble_status_t	at_ble_set_conn_mode (at_ble_conn_mode_t mode)
	Set connection mode parameter. More...

at_ble_status_t at_ble_conn_update_reply	(	at_ble_handle_t	handle,
		bool	accept,
		uint16_t	ce_len_min,
		uint16_t	ce_len_max
	)

Reply to connection parameters update request AT_BLE_CONN_PARAM_UPDATE_REQUEST.

Parameters

[in]	handle	handle of the connection to be updated
[in]	accept	accept or refuse connection parameters proposed by peer slave device
[in]	ce_len_min	Minimum CE length
[in]	ce_len_max	Maximum CE length

Returns

Upon successful completion the function shall return AT_BLE_SUCCESS, Otherwise the function shall return at_ble_status_t

at_ble_status_t at_ble_connect	(	at_ble_addr_t	peers[],
		uint8_t	peer_count,
		uint16_t	scan_interval,
		uint16_t	scan_window,
		at_ble_connection_params_t *	connection_params
	)

Connect to a peer device.

Connecting to a peer device, implicitly starting the necessary scan operation then connecting if a device in the peers list is found in case of using default mode AT_BLE_CONNECTION_AUTO. In case of using AT_BLE_CONNECTION_DIRECT mode, device will try to connect directly to provided peer address only without scanning. This API returns immediately after the operation is programmed, actual connection establishment or failure is marked with AT_BLE_CONNECTED event

Parameters

[in]	peers	List of peers' addresses that the device will connect to one of them
[in]	peer_count	Number peers trying to connect with. In case of using AT_BLE_CONNECTION_DIRECT mode, peer_count should be 1.
[in]	scan_interval	Scan interval in 625us units
[in]	scan_window	Scan window in 625us units
[in]	connection_params	Parameters of the established connection

Note

Default connection mode is AT_BLE_CONNECTION_AUTO

See Also

at_ble_set_conn_mode

Returns

Upon successful completion the function shall return AT_BLE_SUCCESS, Otherwise the function shall return at_ble_status_t

at_ble_status_t at_ble_connect_cancel

(

void

)

Cancels an ongoing connection attempt.

Returns

Upon successful completion the function shall return AT_BLE_SUCCESS, Otherwise the function shall return at_ble_status_t

at_ble_status_t at_ble_connection_param_update	(	at_ble_handle_t	handle,
		at_ble_connection_params_t *	connection_params
	)

Update the connection parameters of an ongoing connection.

Connection parameter update command can be used by both master and slave of the connection.
For master of the connection, new connection parameters will be applied immediately.
For slave of the connection, a connection update message request will be send to master. Then master will be able to accept or refuse those parameters within 30 seconds otherwise link is automatically disconnected.

Note

This API returns after programming the new values but before they take effect, actual effect of the parameters is marked by the event AT_BLE_CONN_PARAM_UPDATE_DONE

Parameters

[in]	handle	handle of the connection to be updated
[in]	connection_params	new parameters to be used

Returns

Upon successful completion the function shall return AT_BLE_SUCCESS, Otherwise the function shall return at_ble_status_t

at_ble_status_t at_ble_disconnect	(	at_ble_handle_t	handle,
		at_ble_disconnect_reason_t	reason
	)

Disconnect a connected peer device and receive response through AT_BLE_DISCONNECTED event.

Parameters

[in]	handle	handle of the connection to be terminated
[in]	reason	disconnection reason, more info at at_ble_disconnect_reason_t

Note

• At AT_BLE_DISCONNECTED event, for reason of disconnection see Bluetooth error code at Bluetooth core specification; vol 2, Core System Package [BR/EDR Controller volume], Part D

Returns

Upon successful completion the function shall return AT_BLE_SUCCESS, Otherwise the function shall return at_ble_status_t

at_ble_status_t at_ble_set_conn_mode

(

at_ble_conn_mode_t

mode

)

Set connection mode parameter.

Parameters

[in]

mode

selected mode, one of at_ble_conn_mode_t

Returns

Upon successful completion the function shall return AT_BLE_SUCCESS, Otherwise the function shall return at_ble_status_t