This represents the default values for the configuration macros for the MQTT library. More...

#include "core_mqtt_config.h"

Macros
#define	MQTT_DO_NOT_USE_CUSTOM_CONFIG
	Define this macro to build the MQTT library without the custom config file core_mqtt_config.h. More...

#define	MQTT_SUB_UNSUB_MAX_VECTORS ( 4U )
	Maximum number of vectors in subscribe and unsubscribe packet.

#define	MQTT_MAX_CONNACK_RECEIVE_RETRY_COUNT ( 5U )
	The number of retries for receiving CONNACK. More...

#define	MQTT_PINGRESP_TIMEOUT_MS ( 5000U )
	Maximum number of milliseconds to wait for a ping response to a ping request as part of the keep-alive mechanism. More...

#define	PACKET_TX_TIMEOUT_MS ( 30000U )
	Maximum number of milliseconds of TX inactivity to wait before initiating a PINGREQ. More...

#define	PACKET_RX_TIMEOUT_MS ( 30000U )
	Maximum number of milliseconds of RX inactivity to wait before initiating a PINGREQ. More...

#define	MQTT_RECV_POLLING_TIMEOUT_MS ( 10U )
	The maximum duration between non-empty network reads while receiving an MQTT packet via the MQTT_ProcessLoop or MQTT_ReceiveLoop API functions. More...

#define	MQTT_SEND_RETRY_TIMEOUT_MS ( 10U )
	The maximum duration between non-empty network transmissions while sending an MQTT packet via the MQTT_ProcessLoop or MQTT_ReceiveLoop API functions. More...

Detailed Description

This represents the default values for the configuration macros for the MQTT library.

Note: This file SHOULD NOT be modified. If custom values are needed for any configuration macro, a core_mqtt_config.h file should be provided to the MQTT library to override the default values defined in this file. To use the custom config file, the MQTT_DO_NOT_USE_CUSTOM_CONFIG preprocessor macro SHOULD NOT be set.

Macro Definition Documentation

◆ MQTT_DO_NOT_USE_CUSTOM_CONFIG

#define MQTT_DO_NOT_USE_CUSTOM_CONFIG

Define this macro to build the MQTT library without the custom config file core_mqtt_config.h.

Without the custom config, the MQTT library builds with default values of config macros defined in core_mqtt_config_defaults.h file.

If a custom config is provided, then MQTT_DO_NOT_USE_CUSTOM_CONFIG should not be defined.

◆ MQTT_MAX_CONNACK_RECEIVE_RETRY_COUNT

#define MQTT_MAX_CONNACK_RECEIVE_RETRY_COUNT ( 5U )

The number of retries for receiving CONNACK.

The MQTT_MAX_CONNACK_RECEIVE_RETRY_COUNT will be used only when the timeoutMs parameter of MQTT_Connect is passed as 0 . The transport receive for CONNACK will be retried MQTT_MAX_CONNACK_RECEIVE_RETRY_COUNT times before timing out. A value of 0 for this config will cause the transport receive for CONNACK to be invoked only once.

Possible values: Any positive 16 bit integer.
Default value: 5

◆ MQTT_PINGRESP_TIMEOUT_MS

#define MQTT_PINGRESP_TIMEOUT_MS ( 5000U )

Maximum number of milliseconds to wait for a ping response to a ping request as part of the keep-alive mechanism.

If a ping response is not received before this timeout, then MQTT_ProcessLoop will return MQTTKeepAliveTimeout.

Note: If this value is more than half of the keep alive interval, and the server does not receive the previous ping request, then it is likely that the server will disconnect the client before MQTTKeepAliveTimeout can be returned.; If a dummy implementation of the MQTTGetCurrentTimeFunc_t timer function, is supplied to the library, then the keep-alive mechanism is not supported by the MQTT_ProcessLoop API function. In that case, the value of MQTT_PINGRESP_TIMEOUT_MS is irrelevant to the behavior of the library.

Possible values: Any positive integer up to SIZE_MAX.
Default value: 5000

◆ PACKET_TX_TIMEOUT_MS

#define PACKET_TX_TIMEOUT_MS ( 30000U )

Maximum number of milliseconds of TX inactivity to wait before initiating a PINGREQ.

Note: If this value is less than the keep alive interval than it will be used instead.

Possible values: Any positive integer up to SIZE_MAX.
Default value: '30000'

◆ PACKET_RX_TIMEOUT_MS

#define PACKET_RX_TIMEOUT_MS ( 30000U )

Maximum number of milliseconds of RX inactivity to wait before initiating a PINGREQ.

Possible values: Any positive integer up to SIZE_MAX.
Default value: '30000'

◆ MQTT_RECV_POLLING_TIMEOUT_MS

#define MQTT_RECV_POLLING_TIMEOUT_MS ( 10U )

The maximum duration between non-empty network reads while receiving an MQTT packet via the MQTT_ProcessLoop or MQTT_ReceiveLoop API functions.

When an incoming MQTT packet is detected, the transport receive function may be called multiple times until all of the expected number of bytes of the packet are received. This timeout represents the maximum polling duration that is allowed without any data reception from the network for the incoming packet.

If the timeout expires, the MQTT_ProcessLoop and MQTT_ReceiveLoop functions return MQTTRecvFailed.

Note: If a dummy implementation of the MQTTGetCurrentTimeFunc_t timer function, is supplied to the library, then MQTT_RECV_POLLING_TIMEOUT_MS MUST be set to 0.

Possible values: Any positive 32 bit integer. Recommended to use a small timeout value.
Default value: 10

◆ MQTT_SEND_RETRY_TIMEOUT_MS

#define MQTT_SEND_RETRY_TIMEOUT_MS ( 10U )

The maximum duration between non-empty network transmissions while sending an MQTT packet via the MQTT_ProcessLoop or MQTT_ReceiveLoop API functions.

When sending an MQTT packet, the transport send function may be called multiple times until all of the required number of bytes are sent. This timeout represents the maximum duration that is allowed for no data transmission over the network through the transport send function.

If the timeout expires, the MQTT_ProcessLoop and MQTT_ReceiveLoop functions return MQTTSendFailed.

Note: If a dummy implementation of the MQTTGetCurrentTimeFunc_t timer function, is supplied to the library, then MQTT_SEND_RETRY_TIMEOUT_MS MUST be set to 0.