Functions

Functions
uint32_t	sd_ble_gap_address_set (ble_gap_addr_t const *p_addr)
	Set local Bluetooth address. More...
uint32_t	sd_ble_gap_address_get (ble_gap_addr_t *p_addr)
	Get local Bluetooth address. More...
uint32_t	sd_ble_gap_adv_data_set (uint8_t const *p_data, uint8_t dlen, uint8_t const *p_sr_data, uint8_t srdlen)
	Set, clear or update advertising and scan response data. More...
uint32_t	sd_ble_gap_adv_start (ble_gap_adv_params_t const *p_adv_params)
	Start advertising (GAP Discoverable, Connectable modes, Broadcast Procedure). More...
uint32_t	sd_ble_gap_adv_stop (void)
	Stop advertising (GAP Discoverable, Connectable modes, Broadcast Procedure). More...
uint32_t	sd_ble_gap_conn_param_update (uint16_t conn_handle, ble_gap_conn_params_t const *p_conn_params)
	Update connection parameters. More...
uint32_t	sd_ble_gap_disconnect (uint16_t conn_handle, uint8_t hci_status_code)
	Disconnect (GAP Link Termination). More...
uint32_t	sd_ble_gap_tx_power_set (int8_t tx_power)
	Set the radio's transmit power. More...
uint32_t	sd_ble_gap_appearance_set (uint16_t appearance)
	Set GAP Appearance value. More...
uint32_t	sd_ble_gap_appearance_get (uint16_t *p_appearance)
	Get GAP Appearance value. More...
uint32_t	sd_ble_gap_ppcp_set (ble_gap_conn_params_t const *p_conn_params)
	Set GAP Peripheral Preferred Connection Parameters. More...
uint32_t	sd_ble_gap_ppcp_get (ble_gap_conn_params_t *p_conn_params)
	Get GAP Peripheral Preferred Connection Parameters. More...
uint32_t	sd_ble_gap_device_name_set (ble_gap_conn_sec_mode_t const *p_write_perm, uint8_t const *p_dev_name, uint16_t len)
	Set GAP device name. More...
uint32_t	sd_ble_gap_device_name_get (uint8_t *p_dev_name, uint16_t *p_len)
	Get GAP device name. More...
uint32_t	sd_ble_gap_authenticate (uint16_t conn_handle, ble_gap_sec_params_t const *p_sec_params)
	Initiate GAP Authentication procedure. More...
uint32_t	sd_ble_gap_sec_params_reply (uint16_t conn_handle, uint8_t sec_status, ble_gap_sec_params_t const *p_sec_params, ble_gap_sec_keyset_t const *p_sec_keyset)
	Reply with GAP security parameters. More...
uint32_t	sd_ble_gap_auth_key_reply (uint16_t conn_handle, uint8_t key_type, uint8_t const *p_key)
	Reply with an authentication key. More...
uint32_t	sd_ble_gap_encrypt (uint16_t conn_handle, ble_gap_master_id_t const *p_master_id, ble_gap_enc_info_t const *p_enc_info)
	Initiate GAP Encryption procedure. More...
uint32_t	sd_ble_gap_sec_info_reply (uint16_t conn_handle, ble_gap_enc_info_t const *p_enc_info, ble_gap_irk_t const *p_id_info, ble_gap_sign_info_t const *p_sign_info)
	Reply with GAP security information. More...
uint32_t	sd_ble_gap_conn_sec_get (uint16_t conn_handle, ble_gap_conn_sec_t *p_conn_sec)
	Get the current connection security. More...
uint32_t	sd_ble_gap_rssi_start (uint16_t conn_handle)
	Start reporting the received signal strength to the application. More...
uint32_t	sd_ble_gap_rssi_stop (uint16_t conn_handle)
	Stop reporting the received singnal strength. More...
uint32_t	sd_ble_gap_scan_start (ble_gap_scan_params_t const *p_scan_params)
	Start scanning (GAP Discovery procedure, Observer Procedure). More...
uint32_t	sd_ble_gap_scan_stop (void)
	Stop scanning (GAP Discovery procedure, Observer Procedure). More...
uint32_t	sd_ble_gap_connect (ble_gap_addr_t const *p_peer_addr, ble_gap_scan_params_t const *p_scan_params, ble_gap_conn_params_t const *p_conn_params)
	Create a connection (GAP Link Establishment). More...
uint32_t	sd_ble_gap_connect_cancel (void)
	Cancel a connection establishment. More...

Detailed Description

Function Documentation

uint32_t sd_ble_gap_address_get

(

ble_gap_addr_t *

p_addr

)

Get local Bluetooth address.

Parameters

[out]

p_addr

Pointer to address structure to be filled in.

Return values

NRF_SUCCESS	Address successfully retrieved.
NRF_ERROR_INVALID_ADDR	Invalid pointer supplied.

uint32_t sd_ble_gap_address_set

(

ble_gap_addr_t const *

p_addr

)

Set local Bluetooth address.

Parameters

[in]

p_addr

Pointer to address structure.

Return values

NRF_SUCCESS	Address successfully set.
NRF_ERROR_INVALID_ADDR	Invalid pointer supplied.
BLE_ERROR_GAP_INVALID_BLE_ADDR	Invalid address.

uint32_t sd_ble_gap_adv_data_set	(	uint8_t const *	p_data,
		uint8_t	dlen,
		uint8_t const *	p_sr_data,
		uint8_t	srdlen
	)

Set, clear or update advertising and scan response data.

Note

The format of the advertising data will be checked by this call to ensure interoperability. Limitations imposed by this API call to the data provided include having a flags data type in the scan response data and duplicating the local name in the advertising data and scan response data.

: To clear the advertising data and set it to a 0-length packet, simply provide a valid pointer (p_data/p_sr_data) with its corresponding length (dlen/srdlen) set to 0.

: The call will fail if p_data and p_sr_data are both NULL since this would have no effect.

Parameters

[in]	p_data	Raw data to be placed in advertising packet. If NULL, no changes are made to the current advertising packet data.
[in]	dlen	Data length for p_data. Max size: BLE_GAP_ADV_MAX_SIZE octets. Should be 0 if p_data is NULL, can be 0 if p_data is not NULL.
[in]	p_sr_data	Raw data to be placed in scan response packet. If NULL, no changes are made to the current scan response packet data.
[in]	srdlen	Data length for p_sr_data. Max size: BLE_GAP_ADV_MAX_SIZE octets. Should be 0 if p_sr_data is NULL, can be 0 if p_data is not NULL.

Return values

NRF_SUCCESS	Advertising data successfully updated or cleared.
NRF_ERROR_INVALID_ADDR	Invalid pointer supplied.
NRF_ERROR_INVALID_FLAGS	Invalid combination of advertising flags supplied.
NRF_ERROR_INVALID_DATA	Invalid data type(s) supplied, check the advertising data format specification.
NRF_ERROR_INVALID_LENGTH	Invalid data length(s) supplied.
BLE_ERROR_GAP_UUID_LIST_MISMATCH	Invalid UUID list supplied.

uint32_t sd_ble_gap_adv_start

(

ble_gap_adv_params_t const *

p_adv_params

)

Start advertising (GAP Discoverable, Connectable modes, Broadcast Procedure).

Parameters

[in]

p_adv_params

Pointer to advertising parameters structure.

Return values

NRF_SUCCESS	The BLE stack has started advertising.
NRF_ERROR_INVALID_ADDR	Invalid pointer supplied.
NRF_ERROR_INVALID_STATE	Invalid state to perform operation.
NRF_ERROR_INVALID_PARAM	Invalid parameter(s) supplied, check the accepted ranges and limits.
BLE_ERROR_GAP_INVALID_BLE_ADDR	Invalid Bluetooth address supplied.
BLE_ERROR_GAP_DISCOVERABLE_WITH_WHITELIST	Discoverable mode and whitelist incompatible.
NRF_ERROR_BUSY	The stack is busy, process pending events and retry.

uint32_t sd_ble_gap_adv_stop

(

void

)

Stop advertising (GAP Discoverable, Connectable modes, Broadcast Procedure).

Return values

NRF_SUCCESS	The BLE stack has stopped advertising.
NRF_ERROR_INVALID_STATE	Invalid state to perform operation (most probably not in advertising state).

uint32_t sd_ble_gap_appearance_get

(

uint16_t *

p_appearance

)

Get GAP Appearance value.

Parameters

[out]

p_appearance

Pointer to appearance (16-bit) to be filled in, see BLE_APPEARANCES.

Return values

NRF_SUCCESS	Appearance value retrieved successfully.
NRF_ERROR_INVALID_ADDR	Invalid pointer supplied.

uint32_t sd_ble_gap_appearance_set

(

uint16_t

appearance

)

Set GAP Appearance value.

Parameters

[in]

appearance

Appearance (16-bit), see BLE_APPEARANCES.

Return values

NRF_SUCCESS	Appearance value set successfully.
NRF_ERROR_INVALID_PARAM	Invalid parameter(s) supplied.

uint32_t sd_ble_gap_auth_key_reply	(	uint16_t	conn_handle,
		uint8_t	key_type,
		uint8_t const *	p_key
	)

Reply with an authentication key.

Parameters

[in]	conn_handle	Connection handle.
[in]	key_type	See BLE_GAP_AUTH_KEY_TYPES.
[in]	p_key	If key type is BLE_GAP_AUTH_KEY_TYPE_NONE, then NULL. If key type is BLE_GAP_AUTH_KEY_TYPE_PASSKEY, then a 6-byte ASCII string (digit 0..9 only, no NULL termination). If key type is BLE_GAP_AUTH_KEY_TYPE_OOB, then a 16-byte OOB key value in Little Endian format.

This function is only used to reply to a BLE_GAP_EVT_AUTH_KEY_REQUEST, calling it at other times will result in an NRF_ERROR_INVALID_STATE.

Note

If the call returns an error code, the request is still pending, and the reply call may be repeated with corrected parameters.

Return values

NRF_SUCCESS	Authentication key successfully set.
NRF_ERROR_INVALID_ADDR	Invalid pointer supplied.
NRF_ERROR_INVALID_PARAM	Invalid parameter(s) supplied.
NRF_ERROR_INVALID_STATE	Invalid state to perform operation.
BLE_ERROR_INVALID_CONN_HANDLE	Invalid connection handle supplied.

uint32_t sd_ble_gap_authenticate	(	uint16_t	conn_handle,
		ble_gap_sec_params_t const *	p_sec_params
	)

Initiate GAP Authentication procedure.

Parameters

[in]	conn_handle	Connection handle.
[in]	p_sec_params	Pointer to the ble_gap_sec_params_t structure with the security parameters to be used during the pairing procedure. In the peripheral role, only the timeout, bond and mitm fields of this structure are used.

In the central role, this function will send an SMP Pairing Request, otherwise in the peripheral role, an SMP Security Request will be sent.

Note

Calling this function may result in the following events depending on the outcome and parameters: BLE_GAP_EVT_SEC_PARAMS_REQUEST, BLE_GAP_EVT_SEC_INFO_REQUEST, BLE_GAP_EVT_AUTH_KEY_REQUEST, BLE_GAP_EVT_AUTH_STATUS.

Return values

NRF_SUCCESS	Successfully initiated authentication procedure.
NRF_ERROR_INVALID_ADDR	Invalid pointer supplied.
NRF_ERROR_INVALID_PARAM	Invalid parameter(s) supplied.
NRF_ERROR_INVALID_STATE	Invalid state to perform operation.
NRF_ERROR_BUSY	The stack is busy, process pending events and retry.
BLE_ERROR_INVALID_CONN_HANDLE	Invalid connection handle supplied.

uint32_t sd_ble_gap_conn_param_update	(	uint16_t	conn_handle,
		ble_gap_conn_params_t const *	p_conn_params
	)

Update connection parameters.

In the central role this will initiate a Link Layer connection parameter update procedure, otherwise in the peripheral role, this will send the corresponding L2CAP request and wait for the central to perform the procedure. In both cases, and regardless of success or failure, the application will be informed of the result with a BLE_GAP_EVT_CONN_PARAM_UPDATE event.

This function can be used both to reply to a BLE_GAP_EVT_CONN_PARAM_UPDATE_REQUEST or to start the procedure unrequested.

Parameters

[in]	conn_handle	Connection handle.
[in]	p_conn_params	Pointer to desired connection parameters. If NULL is provided on a peripheral role, the parameters in the PPCP characteristic of the GAP service will be used instead. If NULL is provided on a central role and in response to a BLE_GAP_EVT_CONN_PARAM_UPDATE_REQUEST, the peripheral request will be rejected

Return values

NRF_SUCCESS	The Connection Update procedure has been started successfully.
NRF_ERROR_INVALID_ADDR	Invalid pointer supplied.
NRF_ERROR_INVALID_PARAM	Invalid parameter(s) supplied, check parameter limits and constraints.
NRF_ERROR_INVALID_STATE	Invalid state to perform operation.
NRF_ERROR_BUSY	Procedure already in progress or not allowed at this time, process pending events and wait for pending procedures to complete and retry.
BLE_ERROR_INVALID_CONN_HANDLE	Invalid connection handle supplied.
NRF_ERROR_NO_MEM	Not enough memory to complete operation.

uint32_t sd_ble_gap_conn_sec_get	(	uint16_t	conn_handle,
		ble_gap_conn_sec_t *	p_conn_sec
	)

Get the current connection security.

Parameters

[in]	conn_handle	Connection handle.
[out]	p_conn_sec	Pointer to a ble_gap_conn_sec_t structure to be filled in.

Return values

NRF_SUCCESS	Current connection security successfully retrieved.
NRF_ERROR_INVALID_ADDR	Invalid pointer supplied.
BLE_ERROR_INVALID_CONN_HANDLE	Invalid connection handle supplied.

uint32_t sd_ble_gap_connect	(	ble_gap_addr_t const *	p_peer_addr,
		ble_gap_scan_params_t const *	p_scan_params,
		ble_gap_conn_params_t const *	p_conn_params
	)

Create a connection (GAP Link Establishment).

Parameters

[in]	p_peer_addr	Pointer to peer address. If the selective bit is set in ble_gap_scan_params_t, then this must be NULL.
[in]	p_scan_params	Pointer to scan parameters structure.
[in]	p_conn_params	Pointer to desired connection parameters.

Return values

NRF_SUCCESS	Successfully initiated connection procedure.
NRF_ERROR_INVALID_ADDR	Invalid parameter(s) pointer supplied.
NRF_ERROR_INVALID_PARAM	Invalid parameter(s) supplied.
NRF_ERROR_INVALID_STATE	Invalid state to perform operation.
BLE_ERROR_GAP_INVALID_BLE_ADDR	Invalid Peer address.
NRF_ERROR_NO_MEM	limit of available connections reached.
NRF_ERROR_BUSY	The stack is busy, process pending events and retry.

uint32_t sd_ble_gap_connect_cancel

(

void

)

Cancel a connection establishment.

Return values

NRF_SUCCESS	Successfully cancelled an inprogress connection procedure.
NRF_ERROR_INVALID_STATE	Invalid state to perform operation.

uint32_t sd_ble_gap_device_name_get	(	uint8_t *	p_dev_name,
		uint16_t *	p_len
	)

Get GAP device name.

Parameters

[out]	p_dev_name	Pointer to an empty buffer where the UTF-8 non NULL-terminated string will be placed. Set to NULL to obtain the complete device name length.
[in,out]	p_len	Length of the buffer pointed by p_dev_name, complete device name length on output.

Note

If the device name is longer than the size of the supplied buffer, p_len will return the complete device name length, and not the number of bytes actually returned in p_dev_name. The application may use this information to allocate a suitable buffer size.

Return values

NRF_SUCCESS	GAP device name retrieved successfully.
NRF_ERROR_INVALID_ADDR	Invalid pointer supplied.
NRF_ERROR_DATA_SIZE	Invalid data size(s) supplied.

uint32_t sd_ble_gap_device_name_set	(	ble_gap_conn_sec_mode_t const *	p_write_perm,
		uint8_t const *	p_dev_name,
		uint16_t	len
	)

Set GAP device name.

Parameters

[in]	p_write_perm	Write permissions for the Device Name characteristic see ble_gap_conn_sec_mode_t.
[in]	p_dev_name	Pointer to a UTF-8 encoded, non NULL-terminated string.
[in]	len	Length of the UTF-8, non NULL-terminated string pointed to by p_dev_name in octets (must be smaller or equal than BLE_GAP_DEVNAME_MAX_LEN).

Return values

NRF_SUCCESS	GAP device name and permissions set successfully.
NRF_ERROR_INVALID_ADDR	Invalid pointer supplied.
NRF_ERROR_INVALID_PARAM	Invalid parameter(s) supplied.
NRF_ERROR_DATA_SIZE	Invalid data size(s) supplied.

uint32_t sd_ble_gap_disconnect	(	uint16_t	conn_handle,
		uint8_t	hci_status_code
	)

Disconnect (GAP Link Termination).

This call initiates the disconnection procedure, and its completion will be communicated to the application with a BLE_GAP_EVT_DISCONNECTED event.

Parameters

[in]	conn_handle	Connection handle.
[in]	hci_status_code	HCI status code, see BLE_HCI_STATUS_CODES (accepted values are BTLE_REMOTE_USER_TERMINATED_CONNECTION and BTLE_CONN_INTERVAL_UNACCEPTABLE).

Return values

NRF_SUCCESS	The disconnection procedure has been started successfully.
NRF_ERROR_INVALID_PARAM	Invalid parameter(s) supplied.
BLE_ERROR_INVALID_CONN_HANDLE	Invalid connection handle supplied.
NRF_ERROR_INVALID_STATE	Invalid state to perform operation (disconnection is already in progress).

uint32_t sd_ble_gap_encrypt	(	uint16_t	conn_handle,
		ble_gap_master_id_t const *	p_master_id,
		ble_gap_enc_info_t const *	p_enc_info
	)

Initiate GAP Encryption procedure.

Parameters

[in]	conn_handle	Connection handle.
[in]	p_master_id	Pointer to a ble_gap_master_id_t master identification structure.
[in]	p_enc_info	Pointer to a ble_gap_enc_info_t encryption information structure.

In the central role, this function will initiate the encryption procedure using the encryption information provided.

Note

Calling this function may result in the following event depending on the outcome and parameters: BLE_GAP_EVT_CONN_SEC_UPDATE.

Return values

NRF_SUCCESS	Successfully initiated authentication procedure.
NRF_ERROR_INVALID_ADDR	Invalid pointer supplied.
NRF_ERROR_INVALID_STATE	Invalid state to perform operation.
BLE_ERROR_INVALID_CONN_HANDLE	Invalid connection handle supplied.
BLE_ERROR_INVALID_ROLE	Operation is not supported in the Peripheral role.
NRF_ERROR_BUSY	Procedure already in progress or not allowed at this time, wait for pending procedures to complete and retry.

uint32_t sd_ble_gap_ppcp_get

(

ble_gap_conn_params_t *

p_conn_params

)

Get GAP Peripheral Preferred Connection Parameters.

Parameters

[out]

p_conn_params

Pointer to a ble_gap_conn_params_t structure where the parameters will be stored.

Return values

NRF_SUCCESS	Peripheral Preferred Connection Parameters retrieved successfully.
NRF_ERROR_INVALID_ADDR	Invalid pointer supplied.

uint32_t sd_ble_gap_ppcp_set

(

ble_gap_conn_params_t const *

p_conn_params

)

Set GAP Peripheral Preferred Connection Parameters.

Parameters

[in]

p_conn_params

Pointer to a ble_gap_conn_params_t structure with the desired parameters.

Return values

NRF_SUCCESS	Peripheral Preferred Connection Parameters set successfully.
NRF_ERROR_INVALID_ADDR	Invalid pointer supplied.
NRF_ERROR_INVALID_PARAM	Invalid parameter(s) supplied.

uint32_t sd_ble_gap_rssi_start

(

uint16_t

conn_handle

)

Start reporting the received signal strength to the application.

A new event is reported whenever the RSSI value changes, until sd_ble_gap_rssi_stop is called.

Parameters

[in]

conn_handle

Connection handle.

Return values

NRF_SUCCESS	Successfully activated RSSI reporting.
NRF_ERROR_INVALID_STATE	Invalid state to perform operation.
BLE_ERROR_INVALID_CONN_HANDLE	Invalid connection handle supplied.

uint32_t sd_ble_gap_rssi_stop

(

uint16_t

conn_handle

)

Stop reporting the received singnal strength.

An RSSI change detected before the call but not yet received by the application may be reported after sd_ble_gap_rssi_stop has been called.

Parameters

[in]

conn_handle

Connection handle.

Return values

NRF_SUCCESS	Successfully deactivated RSSI reporting.
NRF_ERROR_INVALID_STATE	Invalid state to perform operation.
BLE_ERROR_INVALID_CONN_HANDLE	Invalid connection handle supplied.

uint32_t sd_ble_gap_scan_start

(

ble_gap_scan_params_t const *

p_scan_params

)

Start scanning (GAP Discovery procedure, Observer Procedure).

Parameters

[in]

p_scan_params

Pointer to scan parameters structure.

Return values

NRF_SUCCESS	Successfully initiated scanning procedure.
NRF_ERROR_INVALID_ADDR	Invalid pointer supplied.
NRF_ERROR_INVALID_STATE	Invalid state to perform operation.
NRF_ERROR_INVALID_PARAM	Invalid parameter(s) supplied.
NRF_ERROR_BUSY	The stack is busy, process pending events and retry.
NRF_ERROR_NOT_SUPPORTED	A selected feature is not supported (selective scanning).

uint32_t sd_ble_gap_scan_stop

(

void

)

Stop scanning (GAP Discovery procedure, Observer Procedure).

Return values

NRF_SUCCESS	Successfully stopped scanning procedure.
NRF_ERROR_INVALID_STATE	Invalid state to perform operation (most probably not in scanning state).

uint32_t sd_ble_gap_sec_info_reply	(	uint16_t	conn_handle,
		ble_gap_enc_info_t const *	p_enc_info,
		ble_gap_irk_t const *	p_id_info,
		ble_gap_sign_info_t const *	p_sign_info
	)

Reply with GAP security information.

Parameters

[in]	conn_handle	Connection handle.
[in]	p_enc_info	Pointer to a ble_gap_enc_info_t encryption information structure. May be NULL to signal none is available.
[in]	p_id_info	Pointer to a ble_gap_irk_t identity information structure. May be NULL to signal none is available.
[in]	p_sign_info	Pointer to a ble_gap_sign_info_t signing information structure. May be NULL to signal none is available.

This function is only used to reply to a BLE_GAP_EVT_SEC_INFO_REQUEST, calling it at other times will result in NRF_ERROR_INVALID_STATE.

Note

If the call returns an error code, the request is still pending, and the reply call may be repeated with corrected parameters.

Data signing is not implemented yet. p_sign_info must therefore be NULL.

Return values

NRF_SUCCESS	Successfully accepted security information.
NRF_ERROR_INVALID_PARAM	Invalid parameter(s) supplied.
NRF_ERROR_INVALID_STATE	Invalid state to perform operation.
BLE_ERROR_INVALID_CONN_HANDLE	Invalid connection handle supplied.

uint32_t sd_ble_gap_sec_params_reply	(	uint16_t	conn_handle,
		uint8_t	sec_status,
		ble_gap_sec_params_t const *	p_sec_params,
		ble_gap_sec_keyset_t const *	p_sec_keyset
	)

Reply with GAP security parameters.

Parameters

[in]	conn_handle	Connection handle.
[in]	sec_status	Security status, see BLE_GAP_SEC_STATUS.
[in]	p_sec_params	Pointer to a ble_gap_sec_params_t security parameters structure. As a central this must be set to NULL, as the parameters have already been provided during a previous call to sd_ble_gap_authenticate.
[in,out]	p_sec_keyset	Pointer to a ble_gap_sec_keyset_t security keyset structure. Any keys distributed as a result of the ongoing security procedure will be stored into the memory referenced inside this structure. Bluetooth addresses distributed by the local device constitute an exception, since those will have to be filled in by the user before calling this function. A NULL pointer will result in the keys not being stored at all.

This function is only used to reply to a BLE_GAP_EVT_SEC_PARAMS_REQUEST, calling it at other times will result in an NRF_ERROR_INVALID_STATE.

Note

If the call returns an error code, the request is still pending, and the reply call may be repeated with corrected parameters.

Return values

NRF_SUCCESS	Successfully accepted security parameter from the application.
NRF_ERROR_INVALID_ADDR	Invalid pointer supplied.
NRF_ERROR_INVALID_PARAM	Invalid parameter(s) supplied.
NRF_ERROR_INVALID_STATE	Invalid state to perform operation.
BLE_ERROR_INVALID_CONN_HANDLE	Invalid connection handle supplied.

uint32_t sd_ble_gap_tx_power_set

(

int8_t

tx_power

)

Set the radio's transmit power.

Parameters

[in]

tx_power

Radio transmit power in dBm (accepted values are -40, -30, -20, -16, -12, -8, -4, 0, and 4 dBm).

Note

-40 dBm will not actually give -40 dBm, but will instead be remapped to -30 dBm.

Return values

NRF_SUCCESS	Successfully changed the transmit power.
NRF_ERROR_INVALID_PARAM	Invalid parameter(s) supplied.