Saya menggunakan Raspberry Pi sebagai server web web ini untuk mengontrol mesin CNC seperti yang Anda lihat pada gambar berikut.
(Saya mengambilnya dari git hub)
Saya dapat memasukkan kode g secara manual atau saya dapat mengunggah file kode g tetapi sekarang saya ingin menghubungkan halaman web ini ke Amazon Web Services IoT untuk mengirim kode g secara otomatis ke halaman saya, setelah pencarian yang lama saya menemukan tautan ini menunjukkan cara untuk sambungkan aplikasi web ke AWS IOT, tetapi saya rasa saya masih perlu bantuan dengan hal-hal itu karena saya tidak begitu mengerti bagaimana cara menerapkannya. Ini adalah file server.js:
var config = require('./config');
var serialport = require("serialport");
var SerialPort = serialport.SerialPort; // localize object constructor
var app = require('http').createServer(handler)
, io = require('socket.io').listen(app)
, fs = require('fs');
var static = require('node-static');
var EventEmitter = require('events').EventEmitter;
var url = require('url');
var qs = require('querystring');
var http = require('http');
// test for webcam
config.showWebCam = false;
http.get('http://127.0.0.1:8080', function(res) {
// valid response, enable webcam
console.log('enabling webcam');
config.showWebCam = true;
}).on('socket', function(socket) {
// 2 second timeout on this socket
socket.setTimeout(2000);
socket.on('timeout', function() {
this.abort();
});
}).on('error', function(e) {
console.log('Got error: '+e.message+' not enabling webcam')
});
app.listen(config.webPort);
var fileServer = new static.Server('./i');
function handler (req, res) {
//console.log(req.url);
if (req.url.indexOf('/api/uploadGcode') == 0 && req.method == 'POST') {
// this is a gcode upload, probably from jscut
console.log('new data from jscut');
var b = '';
req.on('data', function (data) {
b += data;
if (b.length > 1e6) {
req.connection.destroy();
}
});
req.on('end', function() {
var post = qs.parse(b);
//console.log(post);
io.sockets.emit('gcodeFromJscut', {'val':post.val});
res.writeHead(200, {"Content-Type": "application/json"});
res.end(JSON.stringify({'data':'ok'}));
});
} else {
fileServer.serve(req, res, function (err, result) {
if (err) console.log('fileServer error: ',err);
});
}
}
function ConvChar( str ) {
c = {'<':'<', '>':'>', '&':'&', '"':'"', "'":''',
'#':'#' };
return str.replace( /[<&>'"#]/g, function(s) { return c[s]; } );
}
var sp = [];
var allPorts = [];
serialport.list(function (err, ports) {
// if on rPi - http://www.hobbytronics.co.uk/raspberry-pi-serial-port
if (fs.existsSync('/dev/ttyAMA0') && config.usettyAMA0 == 1) {
(ports = ports || []).push({comName:'/dev/ttyAMA0',manufacturer: undefined,pnpId: 'raspberryPi__GPIO'});
console.log('adding /dev/ttyAMA0 because it is enabled in config.js, you may need to enable it in the os - http://www.hobbytronics.co.uk/raspberry-pi-serial-port');
}
allPorts = ports;
for (var i=0; i<ports.length; i++) {
!function outer(i){
sp[i] = {};
sp[i].port = ports[i].comName;
sp[i].q = [];
sp[i].qCurrentMax = 0;
sp[i].lastSerialWrite = [];
sp[i].lastSerialReadLine = '';
// 1 means clear to send, 0 means waiting for response
sp[i].handle = new SerialPort(ports[i].comName, {
parser: serialport.parsers.readline("\n"),
baudrate: config.serialBaudRate
});
sp[i].sockets = [];
sp[i].handle.on("open", function() {
console.log('connected to '+sp[i].port+' at '+config.serialBaudRate);
// line from serial port
sp[i].handle.on("data", function (data) {
serialData(data, i);
});
// loop for status ?
setInterval(function() {
// console.log('writing ? to serial');
sp[i].handle.write('?');
}, 1000);
});
}(i)
}
});
function emitToPortSockets(port, evt, obj) {
for (var i=0; i<sp[port].sockets.length; i++) {
sp[port].sockets[i].emit(evt, obj);
}
}
function serialData(data, port) {
// handle ?
if (data.indexOf('<') == 0) {
// https://github.com/grbl/grbl/wiki/Configuring-Grbl-v0.8#---current-status
// remove first <
var t = data.substr(1);
// remove last >
t = t.substr(0,t.length-2);
// split on , and :
t = t.split(/,|:/);
emitToPortSockets(port, 'machineStatus', {'status':t[0], 'mpos':[t[2], t[3], t[4]], 'wpos':[t[6], t[7], t[8]]});
return;
}
if (queuePause == 1) {
// pause queue
return;
}
data = ConvChar(data);
if (data.indexOf('ok') == 0) {
// ok is green
emitToPortSockets(port, 'serialRead', {'line':'<span style="color: green;">RESP: '+data+'</span>'});
// run another line from the q
if (sp[port].q.length > 0) {
// there are remaining lines in the q
// write one
sendFirstQ(port);
}
// remove first
sp[port].lastSerialWrite.shift();
} else if (data.indexOf('error') == 0) {
// error is red
emitToPortSockets(port, 'serialRead', {'line':'<span style="color: red;">RESP: '+data+'</span>'});
// run another line from the q
if (sp[port].q.length > 0) {
// there are remaining lines in the q
// write one
sendFirstQ(port);
}
// remove first
sp[port].lastSerialWrite.shift();
} else {
// other is grey
emitToPortSockets(port, 'serialRead', {'line':'<span style="color: #888;">RESP: '+data+'</span>'});
}
if (sp[port].q.length == 0) {
// reset max once queue is done
sp[port].qCurrentMax = 0;
}
// update q status
emitToPortSockets(port, 'qStatus', {'currentLength':sp[port].q.length, 'currentMax':sp[port].qCurrentMax});
sp[port].lastSerialReadLine = data;
}
var currentSocketPort = {};
function sendFirstQ(port) {
if (sp[port].q.length < 1) {
// nothing to send
return;
}
var t = sp[port].q.shift();
// remove any comments after the command
tt = t.split(';');
t = tt[0];
// trim it because we create the \n
t = t.trim();
if (t == '' || t.indexOf(';') == 0) {
// this is a comment or blank line, go to next
sendFirstQ(port);
return;
}
//console.log('sending '+t+' ### '+sp[port].q.length+' current q length');
// loop through all registered port clients
for (var i=0; i<sp[port].sockets.length; i++) {
sp[port].sockets[i].emit('serialRead', {'line':'<span style="color: black;">SEND: '+t+'</span>'+"\n"});
}
sp[port].handle.write(t+"\n")
sp[port].lastSerialWrite.push(t);
}
var queuePause = 0;
io.sockets.on('connection', function (socket) {
socket.emit('ports', allPorts);
socket.emit('config', config);
// do soft reset, this has it's own clear and direct function call
socket.on('doReset', function (data) {
// soft reset for grbl, send ctrl-x ascii \030
sp[currentSocketPort[socket.id]].handle.write("\030");
// reset vars
sp[currentSocketPort[socket.id]].q = [];
sp[currentSocketPort[socket.id]].qCurrentMax = 0;
sp[currentSocketPort[socket.id]].lastSerialWrite = [];
sp[currentSocketPort[socket.id]].lastSerialRealLine = '';
});
// lines from web ui
socket.on('gcodeLine', function (data) {
if (typeof currentSocketPort[socket.id] != 'undefined') {
// valid serial port selected, safe to send
// split newlines
var nl = data.line.split("\n");
// add to queue
sp[currentSocketPort[socket.id]].q = sp[currentSocketPort[socket.id]].q.concat(nl);
// add to qCurrentMax
sp[currentSocketPort[socket.id]].qCurrentMax += nl.length;
if (sp[currentSocketPort[socket.id]].q.length == nl.length) {
// there was no previous q so write a line
sendFirstQ(currentSocketPort[socket.id]);
}
} else {
socket.emit('serverError', 'you must select a serial port');
}
});
socket.on('clearQ', function(data) {
// clear the command queue
sp[currentSocketPort[socket.id]].q = [];
// update the status
emitToPortSockets(currentSocketPort[socket.id], 'qStatus', {'currentLength':0, 'currentMax':0});
});
socket.on('pause', function(data) {
// pause queue
if (data == 1) {
console.log('pausing queue');
queuePause = 1;
} else {
console.log('unpausing queue');
queuePause = 0;
sendFirstQ(currentSocketPort[socket.id]);
}
});
socket.on('disconnect', function() {
if (typeof currentSocketPort[socket.id] != 'undefined') {
for (var c=0; c<sp[currentSocketPort[socket.id]].sockets.length; c++) {
if (sp[currentSocketPort[socket.id]].sockets[c].id == socket.id) {
// remove old
sp[currentSocketPort[socket.id]].sockets.splice(c,1);
}
}
}
});
socket.on('usePort', function (data) {
console.log('user wants to use port '+data);
console.log('switching from '+currentSocketPort[socket.id]);
if (typeof currentSocketPort[socket.id] != 'undefined') {
for (var c=0; c<sp[currentSocketPort[socket.id]].sockets.length; c++) {
if (sp[currentSocketPort[socket.id]].sockets[c].id == socket.id) {
// remove old
sp[currentSocketPort[socket.id]].sockets.splice(c,1);
}
}
}
if (typeof sp[data] != 'undefined') {
currentSocketPort[socket.id] = data;
sp[data].sockets.push(socket);
} else {
socket.emit('serverError', 'that serial port does not exist');
}
});
});