add nodejs serial connection support

src/connection/nodejs_serial_connection.js

@@ -0,0 +1,61 @@
+import SerialConnection from "./serial_connection.js";
+
+class NodeJSSerialConnection extends SerialConnection {
+
+    constructor() {
+        super();
+    }
+
+    /**
+     * Connect to Serial Port at the provided path
+     * @param path serial port to connect to, e.g: "/dev/ttyACM0" or "/dev/cu.usbmodem14401"
+     * @returns {Promise<void>}
+     */
+    async connect(path) {
+
+        // note: serialport module is only available in NodeJS, you shouldn't use NodeJSSerialConnection from a web browser
+        const { SerialPort } = await import('serialport');
+
+        // create new serial port
+        this.serialPort = new SerialPort({
+            autoOpen: false, // don't auto open, we want to control this manually
+            path: path, // e.g: "/dev/ttyACM0" or "/dev/cu.usbmodem14401"
+            baudRate: 115200,
+        });
+
+        this.serialPort.on("open", () => {
+           this.onConnected();
+        });
+
+        this.serialPort.on("close", () => {
+            this.onDisconnected();
+        });
+
+        this.serialPort.on("error", function(err) {
+            console.log("SerialPort Error: ", err.message)
+        });
+
+        this.serialPort.on("data", async (data) => {
+            await this.onDataReceived(data);
+        });
+
+        // open serial connection
+        this.serialPort.open();
+
+    }
+
+    async close() {
+        try {
+            await this.serialPort.close();
+        } catch(e) {
+            console.log("failed to close serial port, ignoring...", e);
+        }
+    }
+
+    /* override */ async write(bytes) {
+        this.serialPort.write(bytes);
+    }
+
+}
+
+export default NodeJSSerialConnection;