If you want to quickly bring your PLC projects to cloud, you can see this course
You can Setup MQTT broker on AWS EC2, setup Nodejs server and Express framework for Web Application.
You can leverage AWS IoT core and Grafana resource to easy creating dashboard, save data to database and alarm message to user when data over the setpoint value.
You will understand MQTT protocol such as Payload, Topic, QoS, Keepalive, last-will, wildcard, secure communication, authentication... MQTT clients created by python Code, I have examples for every part.
You will understand OPC standard such as OPC DA, OPC UA, secure communication in OPC UA with SSL/TSL. I use Python for OPC UA Client and have examples for every part.
You know the way how to do PLC programming with Siemens, Codesys PLC
You know the way how to do HMI programming with Siemens, Codesys HMI
You will know how to enable OPC UA server
You will know how to use IIOT library with AWS IOT client in CodeSys such as certificate, client, last-will, publish, subscribe, device shadow, Json with publish and subscribe.
With AWS, you can create database to save data, how you can create rule, set the permission for rules.
Know some main concepts of Industrial internet of thing