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@@ -1,17 +1,71 @@
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+// IMPORTANT: install the dependency via 'npm i node-hid' in the same location as the script
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+// 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
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+
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var HID = require('node-hid');
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+var os = require('os')
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+// list of supported devices
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+var boards = require('./boards.js')
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+
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+var isWin = (os.platform() === 'win32');
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var devices = HID.devices();
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-var deviceInfo = devices.find( function(d) {
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- var isNRF = d.vendorId===0Xcafe && d.productId===0X4004;
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- return isNRF;
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-});
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+
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+// this will choose any device found in the boards.js file
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+var deviceInfo = devices.find(anySupportedBoard);
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+var reportLen = 64;
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+
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+var message = "Hello World!"
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+
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+// Turn our string into an array of integers e.g. 'ascii codes', though charCodeAt spits out UTF-16
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+// 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
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+var messageBuffer = Array.from(message, function(c){return c.charCodeAt(0)});
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+
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+// Windows wants you to prepend a 0 to whatever you send
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+if(isWin){
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+ messageBuffer.unshift(0)
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+}
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+
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+// Some OSes expect that you always send a buffer that equals your report length
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+// So lets fill up the rest of the buffer with zeros
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+var paddingBuf = Array(reportLen-messageBuffer.length);
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+paddingBuf.fill(0)
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+messageBuffer = messageBuffer.concat(paddingBuf)
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+
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+// check if we actually found a device and if so send our messageBuffer to it
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if( deviceInfo ) {
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console.log(deviceInfo)
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var device = new HID.HID( deviceInfo.path );
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- device.on("data", function(data) {console.log(data)});
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+ // register an event listener for data coming from the device
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+ device.on("data", function(data) {
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+ // Print what we get from the device
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+ console.log(data.toString('ascii'));
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+ });
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+
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+ // the same for any error that occur
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device.on("error", function(err) {console.log(err)});
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+ // send our message to the device every 500ms
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setInterval(function () {
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- device.write([0x00, 0x01, 0x01, 0x05, 0xff, 0xff]);
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+ device.write(messageBuffer);
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},500)
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}
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+
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+
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+function anySupportedBoard(d) {
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+
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+ for (var key in boards) {
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+ if (boards.hasOwnProperty(key)) {
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+ if (isDevice(boards[key],d)) {
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+ console.log("Found " + d.product);
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+ return true;
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+ }
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+ }
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+ }
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+ return false;
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+}
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+
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+
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+function isDevice(board,d){
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+ return d.vendorId==board[0] && d.productId==board[1];
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+}
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+
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