Functions
fsp_err_t	RM_MQTT_CLIENT_Open (mqtt_client_instance_ctrl_t p_ctrl, mqtt_client_cfg_t const const p_cfg)

fsp_err_t	RM_MQTT_CLIENT_Disconnect (mqtt_client_instance_ctrl_t *p_ctrl)

fsp_err_t	RM_MQTT_CLIENT_Connect (mqtt_client_instance_ctrl_t *p_ctrl, uint32_t timeout_ms)

fsp_err_t	RM_MQTT_CLIENT_Publish (mqtt_client_instance_ctrl_t p_ctrl, mqtt_client_pub_info_t const p_pub_info)

fsp_err_t	RM_MQTT_CLIENT_Subscribe (mqtt_client_instance_ctrl_t p_ctrl, mqtt_client_sub_info_t const p_sub_info, size_t subscription_count)

fsp_err_t	RM_MQTT_CLIENT_UnSubscribe (mqtt_client_instance_ctrl_t p_ctrl, mqtt_client_sub_info_t const p_sub_info)

fsp_err_t	RM_MQTT_CLIENT_Receive (mqtt_client_instance_ctrl_t p_ctrl, mqtt_client_cfg_t const const p_cfg)

fsp_err_t	RM_MQTT_CLIENT_Close (mqtt_client_instance_ctrl_t *p_ctrl)

Detailed Description

MQTT Port is publish-subscribe-based messaging protocol.

Overview

MQTT (Message Queue Telemetry Transport) is an ISO standard (ISO/IEC PRF 20922) publish-subscribe-based messaging protocol. It works on top of the TCP/IP protocol. The publisher sends (PUBLISH) messages to the subscriber through the broker. The subscriber needs to keep the connection with the broker by TCP session while the publisher can disconnect the session with the broker after sending a message. Once the broker receives a message with a specific topic the message is sent to subscribers that already registered with the topic. A subscriber can register with more than one topic. There can be many or no subscribers which registered with a specific topic. The exchange of MQTT messages supports QoS (Quality of Service).

Features

The MQTT Port module has the following key features:

Publish message
Subscribe message
QoS

Configuration

Build Time Configurations for rm_mqtt_port_w

The following build time configurations are defined in fsp_cfg/rm_mqtt_port_w_cfg.h:

Configuration	Options	Default	Description
Parameter Checking	Default (BSP) Enabled Disabled	Default (BSP)	If selected code for parameter checking is included in the build.
Watchdog Service Support	Enabled Disabled	Disabled	Enable when using the Watchdog Service.

Configurations for Networking > MQTT Port (rm_mqtt_port_w)

This module can be added to the Stacks tab via New Stack > Networking > MQTT Port (rm_mqtt_port_w).

Configuration	Options	Default	Description
Certificates
MQTT Certificates Header File	Must be a valid C symbol		Name of header file that will contain certificates (macros). User must create header file if this field is populated.
Root CA	Must be a valid C symbol	ROOT_CA	Links to user-defined macro of the same name for Root CA which user must define in application header.
Client Certificate	Must be a valid C symbol	CLIENT_CERT	Links to user-defined macro of the same name for client certificate which user must define in application header.
Private Key	Must be a valid C symbol	PRIVATE_KEY	Links to user-defined macro of the same name for private key which user must define in application header.
ALPN
ALPN 1	Manual Entry		Select Application Layer Protocol Negotiations (ALPNs)
ALPN 2	Manual Entry		Select Application Layer Protocol Negotiations (ALPNs)
ALPN 3	Manual Entry		Select Application Layer Protocol Negotiations (ALPNs)
Interrupts
Callback	Must be a valid C symbol	mqtt_client0_callback	A user callback function. This callback function must be provided. It is called from the MQTT Receive function to process subscribed MQTT messages.
Name	Name must be a valid C symbol	g_mqtt_client0	Module name.
Use MQTT protocol v3.1.1	Disabled Enabled	Enabled
MQTT Receive Maximum Timeout (ms)	Timeout must be an integer greater than 0 and less than 65535	1000	Timeout for the MQTT Receive function to check the buffer for incoming MQTT messages in milliseconds.
MQTT Transit Maximum Timeout (ms)	Timeout must be an integer greater than 0 and less than 65535	1000	Timeout for publishing MQTT messages in milliseconds.
Clean Session	Disabled Enabled	Enabled
Keep Alive (s)	Must be an integer greater than 0 and less than 65535	60	MQTT ping period to check if connection is still active.
Client Identifier	Manual Entry
Host Name (or IP address)	Manual Entry
MQTT Port	Must be an integer greater than 0 and less than 65535	8883
MQTT User Name	Must be a valid C symbol
MQTT Password	Must be a valid C symbol
Last Will Topic	Manual Entry		Topic for MQTT Last Will message.
Last Will Message	Manual Entry		Payload for MQTT Last Will message.
Server Name Indication (SNI)	Manual Entry
Last Will QoS	0 1 2	0	Quality-of-Service for MQTT Last Will message.
TLS Cipher Suites	Refer to the RAFW Configuration tool for available options.	0U	Select TLS Cipher Suites

Clock Configuration

This module has no required clock configurations.

Pin Configuration

This module does not use I/O pins.

Usage Notes

Refer to WIFI (rm_wifi).

This module is not a standalone module - ensure that the WiFi module APIs are invoked first to configure the RAFW module and connect to an Access Point before using the MQTT module where the default buffer size for incoming TLS is 6KB and outgoing TLS is 4KB.
When the user intends to use secure TLS in their application, they need to provide certificates (root certificate authority, client certificate, and private key) in a header file
The user must provide certificate macro names in the FSP Configurator properties, as well as the name of the header file (to link the module, certificates, and header together)
If the user provides these credentials in the Configurator, they must create a new header file in their /src/ folder with the same name as they provided in the Configurator properties. When the code is generated, a build error will occur if the header file is not created
If only using username and password, these fields can be left blank (default), and a header file does not need to be created

Limitations

Refer to WIFI (rm_wifi).

For publish/subscribe topics, a separate QoS level cannot be set per topic - only one QoS level can be set which applies to all messages
Currently the module only supports unsecured MQTT with username/password or secure MQTT/TLS with certificates (root CA, client certificate, and private key). The module does not accept username/password with certificates.

Examples

Basic Example

This is a basic example of minimal use of the rm-mqtt-port in an application.

fsp_err_t mqtt_client_basic_example (void)
{
    fsp_err_t        mqtt_err;
    /* Initialize the MQTT Client connection */
    mqtt_err = RM_MQTT_CLIENT_Open(&g_rm_mqtt_client_instance, &g_mqtt_client_cfg);
    FSP_ERROR_RETURN(FSP_SUCCESS == mqtt_err, mqtt_err);
    /* Subscribe to MQTT topics to be received */
    mqtt_err = RM_MQTT_CLIENT_Subscribe(&g_rm_mqtt_client_instance, subTopics, 1);
    FSP_ERROR_RETURN(FSP_SUCCESS == mqtt_err, mqtt_err);
    /* Connect to the MQTT Broker */
    mqtt_err = RM_MQTT_CLIENT_Connect(&g_rm_mqtt_client_instance, CONNECT_TIMEOUT);
    FSP_ERROR_RETURN(FSP_SUCCESS == mqtt_err, mqtt_err);
    /* Wait to connect with the MQTT Broker */
    do
    {
        R_BSP_SoftwareDelay(CONNECT_TIMEOUT, BSP_DELAY_UNITS_MILLISECONDS);
    } while (conn_cb_flag == 0);
#ifndef MQTT_NVRAM_ENABLE
    char qos_level[4];
    sprintf((char *)&qos_level, "%d", subTopics[0].qos);
    const char * message_sub_topic[100] = {"mqtt_client", "sub", (char *)subTopics[0].p_topic_filter, (char *)&qos_level};
    mqtt_err = rm_mqtt_client_cmd_mqtt_client(&g_rm_mqtt_client_instance, 4, message_sub_topic);
    FSP_ERROR_RETURN(FSP_SUCCESS == mqtt_err, mqtt_err);
#endif /* !MQTT_NVRAM_ENABLE */
    do
    {
        R_BSP_SoftwareDelay(CONNECT_TIMEOUT, BSP_DELAY_UNITS_MILLISECONDS);
    } while (subscribe_cb_flag == 0);
    /* Publish data to the MQTT Broker */
    mqtt_err = RM_MQTT_CLIENT_Publish(&g_rm_mqtt_client_instance, &pubTopics[0]);
    FSP_ERROR_RETURN(FSP_SUCCESS == mqtt_err, mqtt_err);
    /* Wait to receive data from the MQTT Broker */
    do
    {
        R_BSP_SoftwareDelay(CONNECT_TIMEOUT, BSP_DELAY_UNITS_MILLISECONDS);
    } while (msg_cb_flag == 0);
    /* Receive data from the MQTT Broker */
    mqtt_err = RM_MQTT_CLIENT_Receive(&g_rm_mqtt_client_instance, &g_mqtt_client_cfg);
    FSP_ERROR_RETURN(FSP_SUCCESS == mqtt_err, mqtt_err);
    /* Disconnect from the MQTT Broker */
    mqtt_err = RM_MQTT_CLIENT_Disconnect(&g_rm_mqtt_client_instance);
    FSP_ERROR_RETURN(FSP_SUCCESS == mqtt_err, mqtt_err);
    /* Close the MQTT Client module */
    mqtt_err = RM_MQTT_CLIENT_Close(&g_rm_mqtt_client_instance);
    FSP_ERROR_RETURN(FSP_SUCCESS == mqtt_err, mqtt_err);
    return FSP_SUCCESS;
}

Data Structures
struct	mqtt_client_sub_info_t

struct	mqtt_client_pub_info_t

struct	mqtt_client_callback_context_t

struct	mqtt_client_callback_args_t

struct	mqtt_client_cfg_t

struct	mqtt_client_instance_ctrl_t

Macros
#define	MQTT_CLIENT_MAX_ALPN
	Maximum number of ALPNs supported by RRQ61000.

#define	MQTT_CLIENT_ALPN_MAX_LEN
	Maximum length of ALPN supported by RRQ61000.

#define	MQTT_CLIENT_MAX_SNI_LEN
	Maximum length of SNI supported by RRQ61000.

#define	MQTT_CLIENT_TLS_CIPHER_SUITE_MAX
	Maximum number of TLS cipher suites supported by RRQ61000.

#define	MQTT_CLIENT_TLS_CIPHER_MAX_CNT
	Maximum number of TLS cipher suites supported by RRQ61000.

#define	MQTT_CLIENT_MAX_TOPIC_LEN
	Maximum total length for topics supported by RRQ61000.

#define	MQTT_CLIENT_MAX_PUBMSG_LEN
	Maximum total length for message supported by RRQ61000.

#define	MQTT_CLIENT_MAX_PUBTOPICMSG_LEN
	Maximum total length for message + topic supported by RRQ61000.

#define	MQTT_CLIENT_SUBTOPIC_MAX_CNT
	Maximum number of subscription topics allowed.

Enumerations
enum	mqtt_client_qos_t

enum	mqtt_client_tls_cipher_suites_t

enum	mqtt_client_callback_event_t

Data Structure Documentation

◆ mqtt_client_sub_info_t

struct mqtt_client_sub_info_t

MQTT SUBSCRIBE packet parameters

Data Fields
mqtt_client_qos_t	qos	Quality of Service for subscription.
const char *	p_topic_filter	Topic filter to subscribe to.
uint16_t	topic_filter_length	Length of subscription topic filter.

◆ mqtt_client_pub_info_t

struct mqtt_client_pub_info_t

MQTT PUBLISH packet parameters

Data Fields
mqtt_client_qos_t	qos	Quality of Service for subscription.
const char *	p_topic_name	Topic name on which the message is published.
uint16_t	topic_name_Length	Length of topic name.
const char *	p_payload	Message payload.
uint32_t	payload_length	Message payload length.

◆ mqtt_client_callback_context_t

struct mqtt_client_callback_context_t

MQTT callback context structure to be passed to user callback

Data Fields
mqtt_client_callback_event_t	event	MQTT callback event.

◆ mqtt_client_callback_args_t

struct mqtt_client_callback_args_t

MQTT Packet info structure to be passed to user callback

Data Fields
uint8_t *	p_data	Payload received from subscribed MQTT topic.
const char *	p_topic	Topic to which the message payload belongs to.
uint32_t	data_length	Length of the MQTT payload.
void const *	p_context	Placeholder for user data.

◆ mqtt_client_cfg_t

struct mqtt_client_cfg_t

MQTT Configuration

Data Fields
const uint8_t	use_mqtt_v311
	Flag to use MQTT v3.1.1.

const uint16_t	rx_timeout
	MQTT Rx timeout in milliseconds.

const uint16_t	tx_timeout
	MQTT Tx timeout in milliseconds.

void(*	p_callback )(mqtt_client_callback_args_t *p_args)
	Location of user callback.

void const *	p_context
	Placeholder for user data. Passed to the user callback in mqtt_client_callback_args_t.

uint8_t	clean_session
	Whether to establish a new, clean session or resume a previous session.

uint8_t	alpn_count
	ALPN Protocols count. Max value is 3.

const char *	p_alpns [MQTT_CLIENT_MAX_ALPN]
	ALPN Protocols.

uint8_t	tls_cipher_count
	TLS Cipher suites count. Max value is 17.

uint16_t	keep_alive_seconds
	MQTT keep alive period.

const char *	p_client_identifier
	MQTT Client identifier. Must be unique per client.

uint16_t	client_identifier_length
	Length of the client identifier.

const char *	p_host_name
	MQTT endpoint host name.

const uint16_t	mqtt_port
	MQTT Port number.

const char *	p_mqtt_user_name
	MQTT user name. Set to NULL if not used.

uint16_t	user_name_length
	Length of MQTT user name. Set to 0 if not used.

const char *	p_mqtt_password
	MQTT password. Set to NULL if not used.

uint16_t	password_length
	Length of MQTT password. Set to 0 if not used.

const char *	p_root_ca
	String representing a trusted server root certificate.

uint32_t	root_ca_size
	Size associated with root CA Certificate.

const char *	p_client_cert
	String representing a Client certificate.

uint32_t	client_cert_size
	Size associated with Client certificate.

const char *	p_client_private_key
	String representing Client Private Key.

uint32_t	private_key_size
	Size associated with Client Private Key.

const char *	p_will_topic
	String representing Will Topic.

const char *	p_will_msg
	String representing Will Message.

const char *	p_sni_name
	Server Name Indication.

mqtt_client_qos_t	will_qos_level
	Will Topic QoS level.

mqtt_client_tls_cipher_suites_t	p_tls_cipher_suites [MQTT_CLIENT_TLS_CIPHER_MAX_CNT]
	TLS Cipher suites supported.

◆ mqtt_client_instance_ctrl_t

struct mqtt_client_instance_ctrl_t

MQTT_CLIENT private control block. DO NOT MODIFY.

Data Fields
uint32_t	open	Flag to indicate if MQTT has been opened.
bool	is_mqtt_connected	Flag to track MQTT connection status.
mqtt_client_cfg_t const *	p_cfg	Pointer to p_cfg for MQTT.

Enumeration Type Documentation

◆ mqtt_client_qos_t

enum mqtt_client_qos_t

MQTT Quality-of-service (QoS) levels

Enumerator
MQTT_CLIENT_QOS_0	Delivery at most once.
MQTT_CLIENT_QOS_1	Delivery at least once.
MQTT_CLIENT_QOS_2	Delivery exactly once.

◆ mqtt_client_tls_cipher_suites_t

enum mqtt_client_tls_cipher_suites_t

MQTT TLS Cipher Suites

Enumerator
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA	TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA protocol.
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA	TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA protocol.
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256	TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 protocol.
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384	TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 protocol.
TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256	TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 protocol.
TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384	TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 protocol.
TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA	TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA protocol.
TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA	TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA protocol.
TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256	TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256 protocol.
TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384	TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384 protocol.
TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 protocol.
TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384	TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 protocol.

◆ mqtt_client_callback_event_t

enum mqtt_client_callback_event_t

MQTT callback event

Function Documentation

◆ RM_MQTT_CLIENT_Open()

fsp_err_t RM_MQTT_CLIENT_Open	(	mqtt_client_instance_ctrl_t *	p_ctrl,
		mqtt_client_cfg_t const *const	p_cfg
	)

Initialize the MQTT Client service.

Parameters

[in]	p_ctrl	Pointer to MQTT Client instance control structure.
[in]	p_cfg	Pointer to MQTT Client configuration structure.

Return values

FSP_SUCCESS	Function completed successfully.
FSP_ERR_WIFI_FAILED	Error occurred with command to Wifi module.
FSP_ERR_ASSERTION	The p_cfg instance is NULL.
FSP_ERR_INVALID_ARGUMENT	Data size is too large or NULL.
FSP_ERR_ALREADY_OPEN	The instance has already been opened.

◆ RM_MQTT_CLIENT_Disconnect()

fsp_err_t RM_MQTT_CLIENT_Disconnect ( mqtt_client_instance_ctrl_t * p_ctrl )

Disconnect from MQTT Client service.

Parameters

[in] p_ctrl Pointer to MQTT Client instance control structure.

Return values

FSP_SUCCESS	Function completed successfully.
FSP_ERR_WIFI_FAILED	Error occurred with command to Wifi module.
FSP_ERR_ASSERTION	The p_ctrl instance is NULL.
FSP_ERR_NOT_OPEN	The instance has not been opened or the client is not connected.

◆ RM_MQTT_CLIENT_Connect()

fsp_err_t RM_MQTT_CLIENT_Connect	(	mqtt_client_instance_ctrl_t *	p_ctrl,
		uint32_t	timeout_ms
	)

Configure and connect the MQTT Client service.

Parameters

[in]	p_ctrl	Pointer to MQTT Client instance control structure.
[in]	timeout_ms	Timeout in milliseconds.

Return values

FSP_SUCCESS	Function completed successfully.
FSP_ERR_WIFI_FAILED	Error occurred with command to Wifi module.
FSP_ERR_ASSERTION	The p_ctrl is NULL.
FSP_ERR_NOT_OPEN	The instance has not been opened.
FSP_ERR_IN_USE	The MQTT client is already connected.
FSP_ERR_INVALID_DATA	Response does not contain Connect status.

◆ RM_MQTT_CLIENT_Publish()

fsp_err_t RM_MQTT_CLIENT_Publish	(	mqtt_client_instance_ctrl_t *	p_ctrl,
		mqtt_client_pub_info_t *const	p_pub_info
	)

Publish a message for a given MQTT topic.

Parameters

[in]	p_ctrl	Pointer to MQTT Client instance control structure.
[in]	p_pub_info	MQTT Publish packet parameters.

Return values

FSP_SUCCESS	Function completed successfully.
FSP_ERR_WIFI_FAILED	Error occurred with command to Wifi module.
FSP_ERR_ASSERTION	The p_ctrl, p_pub_info is NULL.
FSP_ERR_NOT_OPEN	The instance has not been opened or the client is not connected.
FSP_ERR_INVALID_DATA	Data size is too large.
FSP_ERR_OUT_OF_MEMORY	Memory allocation error.

◆ RM_MQTT_CLIENT_Subscribe()

fsp_err_t RM_MQTT_CLIENT_Subscribe	(	mqtt_client_instance_ctrl_t *	p_ctrl,
		mqtt_client_sub_info_t *const	p_sub_info,
		size_t	subscription_count
	)

Subscribe to MQTT topics.

Parameters

[in]	p_ctrl	Pointer to MQTT Client instance control structure.
[in]	p_sub_info	List of MQTT subscription info.
[in]	subscription_count	Number of topics to subscribe to.

Return values

FSP_SUCCESS	Function completed successfully.
FSP_ERR_WIFI_FAILED	Error occurred with command to Wifi module.
FSP_ERR_ASSERTION	The p_ctrl, p_sub_info is NULL or subscription_count is 0.
FSP_ERR_NOT_OPEN	The instance has not been opened.
FSP_ERR_INVALID_DATA	Data size is too large.

◆ RM_MQTT_CLIENT_UnSubscribe()

fsp_err_t RM_MQTT_CLIENT_UnSubscribe	(	mqtt_client_instance_ctrl_t *	p_ctrl,
		mqtt_client_sub_info_t *const	p_sub_info
	)

Unsubscribe from MQTT topics.

Parameters

[in]	p_ctrl	Pointer to MQTT Client instance control structure.
[in]	p_sub_info	List of MQTT subscription info.

Return values

FSP_SUCCESS	Function completed successfully.
FSP_ERR_WIFI_FAILED	Error occurred with command to Wifi module.
FSP_ERR_ASSERTION	The p_ctrl, p_sub_info is NULL.
FSP_ERR_NOT_OPEN	The instance has not been opened or the client is not connected.
FSP_ERR_INVALID_DATA	Data size is too large.

◆ RM_MQTT_CLIENT_Receive()

fsp_err_t RM_MQTT_CLIENT_Receive	(	mqtt_client_instance_ctrl_t *	p_ctrl,
		mqtt_client_cfg_t const *const	p_cfg
	)

Receive data subscribed to MQTT Client service.

Parameters

[in]	p_ctrl	Pointer to MQTT Client instance control structure.
[in]	p_cfg	Pointer to MQTT Client configuration structure.

Return values

FSP_SUCCESS	Function completed successfully.
FSP_ERR_ASSERTION	The p_ctrl, p_textstring, p_ip_addr is NULL.
FSP_ERR_NOT_OPEN	The instance has not been opened or the client is not connected.
FSP_ERR_INVALID_DATA	Receive function did not receive valid publish data.

◆ RM_MQTT_CLIENT_Close()

fsp_err_t RM_MQTT_CLIENT_Close ( mqtt_client_instance_ctrl_t * p_ctrl )

Close the MQTT Client service.

Parameters

[in] p_ctrl Pointer to MQTT Client instance control structure.

Return values

FSP_ERR_NOT_OPEN	The instance has not been opened.
FSP_SUCCESS	Function completed successfully.
FSP_ERR_ASSERTION	The p_ctrl, p_textstring, p_ip_addr is NULL.

Functions

Detailed Description

Overview

Features

Configuration

Build Time Configurations for rm_mqtt_port_w

Configurations for Networking > MQTT Port (rm_mqtt_port_w)

Clock Configuration

Pin Configuration

Usage Notes

Limitations

Examples

Basic Example

Data Structures

Macros

Enumerations

Data Structure Documentation

◆ mqtt_client_sub_info_t

◆ mqtt_client_pub_info_t

◆ mqtt_client_callback_context_t

◆ mqtt_client_callback_args_t

◆ mqtt_client_cfg_t

Data Fields

◆ mqtt_client_instance_ctrl_t

Enumeration Type Documentation

◆ mqtt_client_qos_t

◆ mqtt_client_tls_cipher_suites_t

◆ mqtt_client_callback_event_t

Function Documentation

◆ RM_MQTT_CLIENT_Open()

◆ RM_MQTT_CLIENT_Disconnect()

◆ RM_MQTT_CLIENT_Connect()

◆ RM_MQTT_CLIENT_Publish()

◆ RM_MQTT_CLIENT_Subscribe()

◆ RM_MQTT_CLIENT_UnSubscribe()

◆ RM_MQTT_CLIENT_Receive()

◆ RM_MQTT_CLIENT_Close()