mqttConnectionLoss (Function)

This returns information about whether a MQTT connection has been interrupted.

The mqttConnectionLoss function will return whether an interruption has been detected since last call.

Input:

handle : INT

The handle to the MQTT connection.

Returns: BOOL

TRUE if the connection has been interrupted, FALSE if not.

Declaration:

FUNCTION mqttConnectionLoss : BOOL;
VAR_INPUT
   handle : INT;
END_VAR;

Example:

INCLUDE rtcu.inc
 
VAR
   mqtt : INT;
END_VAR;
 
PROGRAM example;
 
BEGIN
   ...
   // Check connection
   IF mqttConnectionLoss(handle := mqtt) THEN
      DebugMsg(message := "Connection to MQTT server has been interrupted");
   END_IF;
   ...
END;
END_PROGRAM;