We are trying to work with the MQTT_Client_Library_3. But after using the programms Publish/Subcribe it isn’t possible to switch on the online debugging. The project is correctly downloaded to the PLC and is running (RUN-LED = green). Maybe you can help us. Many thanks Reinhard
Please check the „Log“ window in PLCnext Engineer for any error messages. [attachment]2021-08-11_18-29-55.jpg[/attachment] Note that the MQTT_Client library has recently been superseded by the IIOT_Library. This also contains an MQTT Client function block. Please don’t use both libraries in the same project. Both the libraries require firmware version 2021.0.5 or later, and you need to choose a corresponding PLC model+firmware version in PLCnext Engineer. If you check all this and it still does not work, please let us know. .
