flutter-waterpump

This is a small demo project showing how to use open62541 with Flutter and asynchronous callbacks.

Setup

The demo project was developed using Ubuntu 18.04 and tested on Ubuntu 18.04 and Android.

OPC UA server

• For the example OPC UA server you need to install Qt (see https://doc.qt.io/qt-5/gettingstarted.html) along with the qtopcua module (see https://github.com/qt/qtopcua). I used Qt 5.15.2. There is a script clone-and-build-qtopcua.sh in server/ which will clone and build qtopca assuming that Qt 5.15.2 is installed in $HOME/Qt.
• qtopcua also contains the waterpump example server this demo is using as a backend. Some lines were changed (see .patch-files) in the example to make it start pumping forever right after it was started.
• To run the server you can use the script make-and-run-waterpump-server.sh in server/
• To check whether everything works you can start the Qt client using LD_LIBRARY_PATH=$HOME/Qt/5.15.2/gcc_64/lib/:$LD_LIBRARY_PATH build/examples/opcua/waterpump/waterpump-qmlcpp/waterpump-qmlcpp

Flutter

• The flutter plugin is located in waterpump_ffi_plugin
• Before building/running this you have to prepare the dart sdk and open62541. To do so you can run prepare-dependencies.sh in waterpump_ffi_plugin/native_code/ which will download the sdk and prepare open62541.

Running

As usual with Flutter plugins there is an example app that shows how to use the plugin located in example. To run this change to the directory and run flutter -d linux run to test the app for linux