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PLCMonitor

PLCMonitor is an prototype Android application for remote monitoring and control of various industrial processes.

This means that this application is far from complete and its objective is not to be, but to develop a reusable coding template for larger projects.

The application only reads applications from various PLCs, the writing is similar.

Two types of users exist in order to be able to manage different privileges to give read and write access only for certain users.

Screenshot Screenshot

Screenshot Screenshot

Be careful that only two PLCs from Siemens are available :

  1. Conditioning of pills, controlled by the PLC S7-1516 2DPPN
  2. Liquid level control, controlled by the PLC S7-1214C

This project may interest two types of people :

  1. Developers wishing to use this project, which brings together several good practices, for their individual projects.
  2. People who want to complete this project.

The two industrial processes shown above were simulated using ProcesSim.

You can download the two industrial processes here:

Conditioning of Pills

Screenshot

Screenshot Screenshot

Liquid Level Control

Screenshot

Screenshot Screenshot

Database

This project uses OrmLite as a database, implemented using three main classes :

  • DatabaseHelper: allows the creation and updating of the database. In addition, this class provides the CAD used by third party classes.

  • DatabaseConfigUtil: provides the configuration file to avoid the use of annotations at startup, which is slow under Android.

    Note: with this mechanism, annotations are 20 times faster than native Android calls.

  • DatabaseModule: database module ensuring dependency injection.

The entire database is encrypted using SQLCipher using a 100-character randomly generated key for each device downloading the application.

Dependency Injection

Dagger has been used for code generation and various annotations. This also facilitates the creation of reusable and interchangeable modules.

The DatabaseModule class allows to provide the different DAO (Data Access Object) models and the ApplicationComponent class provides the database module to the specified fragments and activities.

RxJava

PLCs requiring read R/W access to them using an asyncroneous thread in order not to block the workflow. Reactive Extension (RxJava) has been used for these asynchronous threads and event requests using observable sequences.

Thanks

I would like to thank the Haute École en Hainaut (HEH) for allowing me to work on this project by providing me with a key for ProcesSim and SIMATIC WinAC RTX to simulate a PLC.

Contributions

Various functions may be optimized or spelling errors may occur. If you want to make your own correction on these files, you are free to do so.

License

Code is under the Apache Licence v2.