mqttPendingCount (Function)

This function will return the number of messages that has not been sent yet.

This can be used to verify that all messages have been sent.

Input:

handle : INT

The handle to the MQTT connection.

Returns: SINT

Declaration:

FUNCTION mqttPendingCount : SINT;
VAR_INPUT
   handle   : INT;
END_VAR;

Example:

INCLUDE rtcu.inc
 
VAR
   mqtt  : INT;
END_VAR;
 
PROGRAM test;
 
BEGIN
   ...
   // Clear any pending messages
   IF mqttPendingCount(handle:=mqtt) > 0 THEN
      mqttPendingClear(handle:=mqtt);
   END_IF;
   ...
END;
 
END_PROGRAM;