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In 2018, Sioux.NET on Track was not allowed to show the train layout at Lego World 2018. Fortunately, the Lego store Toypro in Nederweert (NL) offered us the space and opportunity to demo our layout at their place. December 28, 2018 we gave a successful demo to the visitors. You can find pictures at our Flickr page and a video on Youtube. Some facts and figures: The layout at Toypro used a space of approx. 7 x 3 meter. We use a total of 15 Lego Mindstorms EV3 bricks. The EV3 bricks are running (relatively) small programs written in the EV3 programming language. Each brick is only capable of handling the local functionality, e.g. the delta crane can load containers from the conveyor belt to one of the four wagons. It receives a command to do this from the master PC application. Some builds are controlled by two EV3 bricks in Daisy chain modus. We didn't use three bricks in daisy chain because of the buggy firmware :-(. The master PC application is written in Microsoft C# and WPF. It sends commands using the EV3 mailboxes to start a function and to receive status updates. For example, when the train arrives at the Delta crane, the train sends a message to the PC application that is has arrived at the loading area. Next, the PC application waits until the conveyor belt sends a message that a container has arrived at the loading platform. Then the PC application sends a "load wagon" message to the Delta crane. Etc. All the bricks are connected to the PC via USB. Two exceptions: 1) The train is connected using Wifi. 2) The EV3 that controls the air pump, works standalone. Enjoy, Hans