New paradigm for handling attached devices

examples/new_device_test.js

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+/*
+ *
+ * This demonstrates connecting multiple hubs to your laptop. Once connected, all the hubs LED lights will cycle through the same colors simultaneously.
+ *
+ */
+
+const PoweredUP = require("..");
+
+const poweredUP = new PoweredUP.PoweredUP();
+poweredUP.scan(); // Start scanning for hubs
+
+console.log("Looking for Hubs...");
+
+poweredUP.on("discover", async (hub) => { // Wait to discover hubs
+
+    await hub.connect(); // Connect to hub
+    console.log(`Connected to ${hub.name}!`);
+
+    hub.on("attach", (device) => {
+
+        if (device instanceof PoweredUP.ControlPlusLargeMotor) {
+            const motor = device;
+            motor.setSpeed(30);
+        }
+
+        if (device instanceof PoweredUP.ColorDistanceSensor) {
+            const sensor = device;
+            sensor.on("distance", (distance) => { // Adding an event handler for distance automatically subscribes to distance notifications
+                console.log(`Distance ${distance}`);
+            })
+        }
+
+        device.on("detach", () => {
+            console.log(device.connected);
+        })
+
+    });
+
+    hub.on("disconnect", () => {
+        console.log("Hub disconnected");
+    })
+
+});

src/basicmotor.ts

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+import { Device } from "./device";
+import { Hub } from "./hub";
+
+import * as Consts from "./consts";
+
+import { mapSpeed } from "./utils";
+
+export class BasicMotor extends Device {
+
+
+    constructor (hub: Hub, portId: number, type: number = Consts.DeviceType.UNKNOWN) {
+        super(hub, portId, type);
+    }
+
+
+    /**
+     * Set the motor speed.
+     * @method BasicMotor#setSpeed
+     * @param {number} speed For forward, a value between 1 - 100 should be set. For reverse, a value between -1 to -100. Stop is 0.
+     * @returns {Promise} Resolved upon successful completion of command.
+     */
+    public setSpeed (speed: number) {
+        return new Promise((resolve) => {
+            const data = Buffer.from([0x81, this.portId, 0x11, 0x51, 0x00, mapSpeed(speed)]);
+            this.send(data);
+            return resolve();
+        });
+    }
+
+
+    /**
+     * Fully (hard) stop the motor.
+     * @method BasicMotor#brake
+     * @returns {Promise} Resolved upon successful completion of command.
+     */
+    public brake () {
+        return this.setSpeed(127);
+    }
+
+
+}