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Id

Read TwinCAT TIA
Network MQTT Client ActiveClients One client

ns=2;s=DEPRAG Smart/Network/MQTT/ActiveClients/0/Id

Unique identification of the MQTT client in the list of active clients.

Examples:

In addition to the parameters already explained, the following variables must be created / transferred for the implementation in TwinCAT 3:

Beckhoff parameter:

    bMqttReadId
    A boolean variable that can be used to trigger the execution of the ReadId command.
    OutputMqttReadId
    A variable of type "DINT" into which the return value of the ReadId method is written.
    hrMqttReadId
    This can be used to monitor the execution of the command. Error codes have the type HRESULT.
    fbMqtt
    An instance of the "FB_Mqtt" function block supplied with the DEPRAG Smart library.
    ClientId
    A String(255) variable that specifies the client that should execute the command.
    ConnectionHandle
    "ConnectionHandle" received when establishing a connection between DEPRAG Smart Server and your OPC UA client. 


VAR
   bMqttReadId           : BOOL;
   OutputMqttReadId         : DINT;
   hrMqttReadId          : HRESULT;

   fbMqtt  : FB_Mqtt;
END_VAR

hrMqttReadId := fbMqtt.ReadId(
       bExecute    := bMqttReadId,
       ConnectionHandle  := depragSmartConnection.ConnectionHandle,
       ClientId   := '0',
       Output    => OutputMqttReadId);
IF hrMqttReadId <> S_FALSE THEN 
    bMqttReadId := FALSE;
END_IF

For examples and explanations regarding the calls of nodes via Siemens TIA Portal please refer to the sub-menu "Siemens TIA Portal" in section "Getting Started".