Merge pull request #3 from PTS93/master

Added node.js example which works on every OS

Author: hathach

Diff for: examples/HID/hid_generic_inout/hid_test.js

@@ -0,0 +1,67 @@
+// IMPORTANT: install dependency via 'npm i node-hid' in the same location as the script
+// If the install fails on windows you may need to run 'npm i -g windows-build-tools' first to be able to compile native code needed for this library
+
+var HID = require('node-hid');
+var os = require('os')
+
+var isWin = (os.platform() === 'win32');
+var devices = HID.devices();
+
+// choose either of the following supported devices:
+// Metro_nRF52840, Feather_nRF52840
+
+var deviceInfo = devices.find(Feather_nRF52840);
+var reportLen = 64;
+
+var message = "Hello World!"
+
+// Turn our string into an array of integers e.g. 'ascii codes', though charCodeAt spits out UTF-16
+// This means if you have characters in your string that are not Latin-1 you will have to add additional logic for character codes above 255
+var messageBuffer = Array.from(message, function(c){return c.charCodeAt(0)});
+
+// Windows wants you to prepend a 0 to whatever you send
+if(isWin){
+	messageBuffer.unshift(0)
+}
+
+// Some OSes expect that you always send a buffer that equals your report length
+// So lets fill up the rest of the buffer with zeros
+var paddingBuf = Array(reportLen-messageBuffer.length);
+paddingBuf.fill(0)
+messageBuffer = messageBuffer.concat(paddingBuf)
+
+// check if we actually found a device and if so send our messageBuffer to it
+if( deviceInfo ) {
+	console.log(deviceInfo)
+	var device = new HID.HID( deviceInfo.path );
+
+	// register an event listener for data coming from the device
+	device.on("data", function(data) {
+		// Print what we get from the device
+		console.log(data.toString('ascii'));
+	});
+
+	// the same for any error that occur
+	device.on("error", function(err) {console.log(err)});
+
+	// send our message to the device every 500ms
+	setInterval(function () {
+		device.write(messageBuffer);
+	},500)
+}
+
+
+
+
+function Feather_nRF52840(d) {
+    return isDevice(0X239A,0X8029,d)
+}
+
+function Metro_nRF52840(d) {
+    return isDevice(0X239A,0X803F,d)
+}
+
+
+function isDevice(vid,pid,d){
+	return d.vendorId==vid && d.productId==pid;
+}