added index.js and code to test connecting to serialport

Author: nyoung697

index.js

@@ -0,0 +1,84 @@
+const _ = require('lodash');
+const SerialPort = require('serialport');
+const StringDecoder = require('string_decoder').StringDecoder;
+const decoder = new StringDecoder('ascii');
+
+const SERIAL_PORT_SETTINGS = {
+	baudRate: 115200
+};
+
+const getPortList = (callback) => {
+	console.log('getPortList');
+
+	SerialPort.list((err, ports) => {
+		if (!err) {
+			let nPorts = [];
+
+			if (ports.length) {
+				console.log('ports', ports);
+
+				ports.map((port) => {
+					nPorts.push({
+						key: port.comName,
+						value: port.comName,
+						text: port.comName
+					});
+				});
+			}
+
+			callback(null, nPorts);
+		} else {
+			callback();
+		}
+	});
+};
+
+getPortList((err, ports) => {
+	if (!err) {
+		if (ports && ports.length > 0) {
+			// try connecting to each port
+			let index = 0;
+
+			tryConnect(index, ports);
+		}
+	}
+});
+
+const tryConnect = (index, ports, callback) => {
+	const port = ports[index];
+
+	if (port && port.value) {
+		console.log('try connecting to port: ' + port.value);
+		let serialport = new SerialPort(port.value, SERIAL_PORT_SETTINGS);
+
+		serialport.write('V\r');
+
+		serialport.on('data', (data) => {
+			//console.log('onData:', data);
+			let textChunk = decoder.write(data);
+
+			// check if textChunk starts with V1
+			if (textChunk.substring(0, 2) === 'V1') {
+				// disconnect
+				serialport.close();
+
+				// log port connected to
+				console.log('verified connection to port: ' + port.value);
+			}
+		});
+
+		// wait for data to be received
+		_.delay(() => {
+			// try next port
+			tryConnect(index + 1, ports, callback);
+		}, 2500);
+
+		// receive error
+		serialport.on('error', (error) => {
+			//console.log('onError: ', error);
+		});
+	} else {
+		console.log('ENDING CHECK');
+		process.exit();
+	}
+};

package.json

@@ -0,0 +1,13 @@
+{
+  "name": "node-serial-test",
+  "version": "1.0.0",
+  "main": "index.js",
+  "repository": "https://github.com/nyoung697/node-serial-test.git",
+  "author": "Nick Young <[email protected]>",
+  "license": "MIT",
+  "dependencies": {
+    "lodash": "^4.17.10",
+    "serialport": "^6.2.2",
+    "string_decoder": "^1.1.1"
+  }
+}