Train controller example

examples/train_controller.js

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+const PoweredUP = require("..");
+const poweredUP = new PoweredUP.PoweredUP();
+
+const trains = [
+    {
+        name: "Maersk Intermodal",
+        color: PoweredUP.Consts.Colors.LIGHT_BLUE,
+        hubs: [
+            {
+                name: "NK_Maersk",
+                ports: ["A"]
+            }
+        ]
+    },
+    {
+        name: "Horizon Express",
+        color: PoweredUP.Consts.Colors.ORANGE,
+        hubs: [
+            {
+                name: "NK_Horizon_1",
+                ports: ["A"],
+                lights: ["B"]
+            },
+            {
+                name: "NK_Horizon_2",
+                ports: ["A"],
+                reverse: ["A"]
+            }
+        ]
+    },
+    {
+        name: "Emerald Night",
+        color: PoweredUP.Consts.Colors.GREEN,
+        hubs: [
+            {
+                name: "NK_Emerald",
+                ports: ["A"],
+                lights: ["B"]
+            }
+        ]
+    },
+    {
+        name: "Metroliner",
+        color: PoweredUP.Consts.Colors.WHITE,
+        hubs: [
+            {
+                name: "NK_Metroliner",
+                ports: ["A"],
+                lights: ["B"]
+            }
+        ]
+    }
+];
+
+
+let currentTrain = 0;
+poweredUP.on("discover", async (hub) => {
+
+    if (hub instanceof PoweredUP.PUPRemote) {
+        hub.on("button", (button, state) => {
+
+            switch (button) {
+                case "GREEN": {
+                    if (state === PoweredUP.Consts.ButtonStates.PRESSED) {
+                        currentTrain++;
+                        if (currentTrain >= trains.length) {
+                            currentTrain = 0;
+                        }
+                        hub.setLEDColor(trains[currentTrain].color);
+                        console.log(`Switched active train to ${trains[currentTrain].name}`);
+                    }
+                    break;
+                }
+                case "LEFT": {
+                    trains[currentTrain]._speed = trains[currentTrain]._speed || 0;
+                    if (state === PoweredUP.Consts.ButtonStates.UP) {
+                        trains[currentTrain]._speed += 10;
+                        if (trains[currentTrain]._speed > 100) {
+                            trains[currentTrain]._speed = 100;
+                        }
+                    } else if (state === PoweredUP.Consts.ButtonStates.DOWN) {
+                        trains[currentTrain]._speed -= 10;
+                        if (trains[currentTrain]._speed < 0) {
+                            trains[currentTrain]._speed = 0;
+                        }
+                    }
+                    for (let trainHub in trains[currentTrain].hubs) {
+                        if (trainHub._hub) {
+                            for (let port in trainHub.ports) {
+                                trainHub.reverse = trainHub.reverse || [];
+                                trainHub._hub.setMotorSpeed(port, trainHub.reverse.indexOf(port) >= 0 ? -trains[currentTrain].speed : trains[currentTrain].speed);
+                            }
+                        }
+                    }
+                    console.log(`Set ${trains[currentTrain].name} speed to ${trains[currentTrain]._speed}`);
+                }
+            }
+
+        });
+        hub.setLEDColor(trains[currentTrain].color);
+        return;
+    }
+
+    for (let train in trains) {
+        for (let trainHub in train.hubs) {
+            if (hub.name === trainHub.name) {
+                trainHub._hub = hub;
+                hub.setLEDColor(train.color);
+                console.log(`Connected to ${train.name} (${hub.name})`);
+                hub.on("disconnect", () => {
+                    console.log(`Disconnected from ${train.name} (${hub.name})`);
+                    delete trainHub._hub;
+                })
+            }
+        }
+    }
+
+});
+
+
+poweredUP.scan(); // Start scanning for trains
+console.log("Looking for trains...");