Functions
[Generic Attribute Profile (GATT) Client]

Initiate or continue a GATT Primary Service Discovery procedure.

This function initiates or resumes a Primary Service discovery procedure, starting from the supplied handle. If the last service has not been reached, this function must be called again with an updated start handle value to continue the search.

Note:

If any of the discovered services have 128-bit UUIDs which are not present in the table provided to ble_vs_uuids_assign, a UUID structure with type BLE_UUID_TYPE_UNKNOWN will be received in the corresponding event.

Parameters:

[in]	conn_handle	The connection handle identifying the connection to perform this procedure on.
[in]	start_handle	Handle to start searching from.
[in]	p_srvc_uuid	Pointer to the service UUID to be found. If it is NULL, all primary services will be returned.

Return values:

NRF_SUCCESS	Successfully started or resumed the Primary Service Discovery procedure.
BLE_ERROR_INVALID_CONN_HANDLE	Invalid Connection Handle.
NRF_ERROR_INVALID_STATE	Invalid Connection State.
NRF_ERROR_INVALID_PARAM	Invalid parameter(s) supplied.
NRF_ERROR_BUSY	Client procedure already in progress.

Send a Handle Value Confirmation to the GATT Server.

Parameters:

[in]	conn_handle	The connection handle identifying the connection to perform this procedure on.
[in]	handle	The handle of the attribute in the indication.

Return values:

NRF_SUCCESS	Successfully queued the Handle Value Confirmation for transmission.
BLE_ERROR_INVALID_CONN_HANDLE	Invalid Connection Handle.
NRF_ERROR_INVALID_STATE	Invalid Connection State or no Indication pending to be confirmed.
BLE_ERROR_INVALID_ATTR_HANDLE	Invalid attribute handle.

Perform a Write (Characteristic Value or Descriptor, with or without response, signed or not, long or reliable) procedure.

This function can perform all write procedures described in GATT.

Note:

It is important to note that a write without response will consume an application buffer, and will therefore generate a BLE_EVT_TX_COMPLETE event when the packet has been transmitted. A write (with response) on the other hand will use the standard client internal buffer and thus will only generate a BLE_GATTC_EVT_WRITE_RSP event as soon as the write response has been received from the peer. Please see the documentation of sd_ble_tx_buffer_count_get for more details.

Parameters:

[in]	conn_handle	The connection handle identifying the connection to perform this procedure on.
[in]	p_write_params	A pointer to a write parameters structure.

Return values:

NRF_SUCCESS	Successfully started the Write procedure.
BLE_ERROR_INVALID_CONN_HANDLE	Invalid Connection Handle.
NRF_ERROR_INVALID_STATE	Invalid Connection State.
NRF_ERROR_INVALID_ADDR	Invalid pointer supplied.
NRF_ERROR_INVALID_PARAM	Invalid parameter(s) supplied.
NRF_ERROR_DATA_SIZE	Invalid data size(s) supplied.
NRF_ERROR_BUSY	Procedure already in progress.
BLE_ERROR_NO_TX_BUFFERS	There are no available buffers left.

Initiate a GATT Read Multiple Characteristic Values procedure.

This function initiates a GATT Read Multiple Characteristic Values procedure.

Parameters:

[in]	conn_handle	The connection handle identifying the connection to perform this procedure on.
[in]	p_handles	A pointer to the handle(s) of the attribute(s) to be read.
[in]	handle_count	The number of handles in p_handles.

Return values:

NRF_SUCCESS	Successfully started the Read Multiple Characteristic Values procedure.
BLE_ERROR_INVALID_CONN_HANDLE	Invalid Connection Handle.
NRF_ERROR_INVALID_STATE	Invalid Connection State.
NRF_ERROR_INVALID_ADDR	Invalid pointer supplied.
NRF_ERROR_BUSY	Client procedure already in progress.

Initiate or continue a GATT Read (Long) Characteristic or Descriptor procedure.

This function initiates or resumes a GATT Read (Long) Characteristic or Descriptor procedure. If the Characteristic or Descriptor to be read is longer than ATT_MTU - 1, this function must be called multiple times with appropriate offset to read the complete value.

Parameters:

[in]	conn_handle	The connection handle identifying the connection to perform this procedure on.
[in]	handle	The handle of the attribute to be read.
[in]	offset	Offset into the attribute value to be read.

Return values:

NRF_SUCCESS	Successfully started or resumed the Read (Long) procedure.
BLE_ERROR_INVALID_CONN_HANDLE	Invalid Connection Handle.
NRF_ERROR_INVALID_STATE	Invalid Connection State.
NRF_ERROR_INVALID_ADDR	Invalid pointer supplied.
NRF_ERROR_BUSY	Client procedure already in progress.

Initiate or continue a GATT Read using Characteristic UUID procedure.

This function initiates or resumes a Read using Characteristic UUID procedure. If the last Characteristic has not been reached, this must be called again with an updated handle range to continue the discovery.

Parameters:

[in]	conn_handle	The connection handle identifying the connection to perform this procedure on.
[in]	p_uuid	Pointer to a Characteristic value UUID to read.
[in]	p_handle_range	A pointer to the range of handles to perform this procedure on.

Return values:

NRF_SUCCESS	Successfully started or resumed the Read using Characteristic UUID procedure.
BLE_ERROR_INVALID_CONN_HANDLE	Invalid Connection Handle.
NRF_ERROR_INVALID_STATE	Invalid Connection State.
NRF_ERROR_INVALID_ADDR	Invalid pointer supplied.
NRF_ERROR_BUSY	Client procedure already in progress.

Initiate or continue a GATT Characteristic Descriptor Discovery procedure.

This function initiates or resumes a Characteristic Descriptor discovery procedure. If the last Descriptor has not been reached, this must be called again with an updated handle range to continue the discovery.

Parameters:

[in]	conn_handle	The connection handle identifying the connection to perform this procedure on.
[in]	p_handle_range	A pointer to the range of handles of the Characteristic to perform this procedure on.

Return values:

NRF_SUCCESS	Successfully started or resumed the Descriptor Discovery procedure.
BLE_ERROR_INVALID_CONN_HANDLE	Invalid Connection Handle.
NRF_ERROR_INVALID_STATE	Invalid Connection State.
NRF_ERROR_INVALID_ADDR	Invalid pointer supplied.
NRF_ERROR_BUSY	Client procedure already in progress.

Initiate or continue a GATT Characteristic Discovery procedure.

This function initiates or resumes a Characteristic discovery procedure. If the last Characteristic has not been reached, this must be called again with an updated handle range to continue the discovery.

Note:

If any of the discovered characteristics have 128-bit UUIDs which are not present in the table provided to ble_vs_uuids_assign, a UUID structure with type BLE_UUID_TYPE_UNKNOWN will be received in the corresponding event.

Parameters:

[in]	conn_handle	The connection handle identifying the connection to perform this procedure on.
[in]	p_handle_range	A pointer to the range of handles of the Service to perform this procedure on.

Return values:

NRF_SUCCESS	Successfully started or resumed the Characteristic Discovery procedure.
BLE_ERROR_INVALID_CONN_HANDLE	Invalid Connection Handle.
NRF_ERROR_INVALID_STATE	Invalid Connection State.
NRF_ERROR_INVALID_ADDR	Invalid pointer supplied.
NRF_ERROR_BUSY	Client procedure already in progress.

Initiate or continue a GATT Relationship Discovery procedure.

This function initiates or resumes the Find Included Services sub-procedure. If the last included service has not been reached, this must be called again with an updated handle range to continue the search.

Parameters:

[in]	conn_handle	The connection handle identifying the connection to perform this procedure on.
[in]	p_handle_range	A pointer to the range of handles of the Service to perform this procedure on.

Return values:

NRF_SUCCESS	Successfully started or resumed the Relationship Discovery procedure.
BLE_ERROR_INVALID_CONN_HANDLE	Invalid Connection Handle.
NRF_ERROR_INVALID_STATE	Invalid Connection State.
NRF_ERROR_INVALID_ADDR	Invalid pointer supplied.
NRF_ERROR_INVALID_PARAM	Invalid parameter(s) supplied.
NRF_ERROR_BUSY	Client procedure already in progress.