MQTTPublish (FB)¶

FUNCTION_BLOCK MQTTPublish EXTENDS CBML.ETrigTo IMPLEMENTS IClientAction

Function block to publish (send) messages to a MQTT broker Use the input udiTimeout (see CBML.ETrigTo) to set the time in µs in which an acknowledgement must be received (relevant for QoS1 and QoS2). Default: 1s

InOut:

Scope	Name	Type	Comment	Inherited from
Input	xExecute	BOOL	Rising edge: Starts defined operation FALSE: Resets the defined operation after ready condition was reached	ETrigTo
	udiTimeOut	UDINT	Max. operating time for executing [µs], 0: No operating time limit	ETrigTo
Output	xDone	BOOL	Ready condition reached	ETrigTo
	xBusy	BOOL	Operation is running	ETrigTo
	xError	BOOL	Error condition reached	ETrigTo
Input	eQoS	MQTT_QOS	QoS Level of message
	xReDelivery	BOOL	TRUE: When packet got already send and now should got resend, FALSE: First time
	xRetain	BOOL	TRUE: Stores the message on server
	pbPayload	POINTER TO BYTE	Pointer to the message
	udiPayloadSize	UDINT	Size of message
	mQTTPublishProperties	REFERENCE TO MQTTPublishProperties	Optional publish properties (MQTT V5 only)
Inout	mqttClient	MQTTClient	Function block MQTTClient
	wsTopicName	WSTRING(1024)	Topic Name of message
Output	eMQTTError	MQTT_ERROR	MQTT Error type