MQTT_ReadTopicReal (FUN)

FUNCTION MQTT_ReadTopicReal : WORD

This function subscribes to the specified MQTT topic and returns published messages as real numbers.

The output valid is set to TRUE when a publication occurs on the topic and the message payload is stored into value.

InOut:

Scope	Name	Type	Comment
Return	MQTT_ReadTopicReal	WORD	Status code returned by the runtime (0 means "no errors").
Inout	id	WORD	Operation identifier used by the runtime.
Input	topic	STRING(127)	MQTT topic name.
	qos	WORD	Quality of Service level.
Output	value	REAL	Real value published on the topic.
	valid	BOOL	TRUE when a valid value has been received.