mirror of
https://github.com/node-red/node-red-nodes.git
synced 2023-10-10 13:36:58 +02:00
449 lines
21 KiB
JavaScript
449 lines
21 KiB
JavaScript
|
|
module.exports = function(RED) {
|
|
"use strict";
|
|
var settings = RED.settings;
|
|
var events = require("events");
|
|
var serialp = require("serialport");
|
|
var bufMaxSize = 32768; // Max serial buffer size, for inputs...
|
|
|
|
// TODO: 'serialPool' should be encapsulated in SerialPortNode
|
|
|
|
// Configuration Node
|
|
function SerialPortNode(n) {
|
|
RED.nodes.createNode(this,n);
|
|
this.serialport = n.serialport;
|
|
this.newline = n.newline; /* overloaded: split character, timeout, or character count */
|
|
this.addchar = n.addchar || "";
|
|
this.serialbaud = parseInt(n.serialbaud) || 57600;
|
|
this.databits = parseInt(n.databits) || 8;
|
|
this.parity = n.parity || "none";
|
|
this.stopbits = parseInt(n.stopbits) || 1;
|
|
this.bin = n.bin || "false";
|
|
this.out = n.out || "char";
|
|
this.waitfor = n.waitfor || "";
|
|
this.responsetimeout = n.responsetimeout || 10000;
|
|
}
|
|
RED.nodes.registerType("serial-port",SerialPortNode);
|
|
|
|
|
|
// receives msgs and sends them to the serial port
|
|
function SerialOutNode(n) {
|
|
RED.nodes.createNode(this,n);
|
|
this.serial = n.serial;
|
|
this.serialConfig = RED.nodes.getNode(this.serial);
|
|
|
|
if (this.serialConfig) {
|
|
var node = this;
|
|
node.port = serialPool.get(this.serialConfig);
|
|
|
|
node.on("input",function(msg) {
|
|
if (!msg.hasOwnProperty("payload")) { return; } // do nothing unless we have a payload
|
|
var payload = node.port.encodePayload(msg.payload);
|
|
node.port.write(payload,function(err,res) {
|
|
if (err) {
|
|
var errmsg = err.toString().replace("Serialport","Serialport "+node.port.serial.path);
|
|
node.error(errmsg,msg);
|
|
}
|
|
});
|
|
});
|
|
node.port.on('ready', function() {
|
|
node.status({fill:"green",shape:"dot",text:"node-red:common.status.connected"});
|
|
});
|
|
node.port.on('closed', function() {
|
|
node.status({fill:"red",shape:"ring",text:"node-red:common.status.not-connected"});
|
|
});
|
|
}
|
|
else {
|
|
this.error(RED._("serial.errors.missing-conf"));
|
|
}
|
|
|
|
this.on("close", function(done) {
|
|
if (this.serialConfig) {
|
|
serialPool.close(this.serialConfig.serialport,done);
|
|
}
|
|
else {
|
|
done();
|
|
}
|
|
});
|
|
}
|
|
RED.nodes.registerType("serial out",SerialOutNode);
|
|
|
|
|
|
// receives data from the serial port and emits msgs
|
|
function SerialInNode(n) {
|
|
RED.nodes.createNode(this,n);
|
|
this.serial = n.serial;
|
|
this.serialConfig = RED.nodes.getNode(this.serial);
|
|
|
|
if (this.serialConfig) {
|
|
var node = this;
|
|
node.status({fill:"grey",shape:"dot",text:"node-red:common.status.not-connected"});
|
|
node.port = serialPool.get(this.serialConfig);
|
|
|
|
this.port.on('data', function(msgout) {
|
|
node.send(msgout);
|
|
});
|
|
this.port.on('ready', function() {
|
|
node.status({fill:"green",shape:"dot",text:"node-red:common.status.connected"});
|
|
});
|
|
this.port.on('closed', function() {
|
|
node.status({fill:"red",shape:"ring",text:"node-red:common.status.not-connected"});
|
|
});
|
|
}
|
|
else {
|
|
this.error(RED._("serial.errors.missing-conf"));
|
|
}
|
|
|
|
this.on("close", function(done) {
|
|
if (this.serialConfig) {
|
|
serialPool.close(this.serialConfig.serialport,done);
|
|
}
|
|
else {
|
|
done();
|
|
}
|
|
});
|
|
}
|
|
RED.nodes.registerType("serial in",SerialInNode);
|
|
|
|
|
|
/******* REQUEST *********/
|
|
function SerialRequestNode(n) {
|
|
RED.nodes.createNode(this,n);
|
|
this.serial = n.serial;
|
|
this.serialConfig = RED.nodes.getNode(this.serial);
|
|
|
|
if (this.serialConfig) {
|
|
var node = this;
|
|
node.port = serialPool.get(this.serialConfig);
|
|
// Serial Out
|
|
node.on("input",function(msg) {
|
|
if (!msg.hasOwnProperty("payload")) { return; } // do nothing unless we have a payload
|
|
if (msg.hasOwnProperty("count") && (typeof msg.count === "number") && (node.serialConfig.out === "count")) {
|
|
node.serialConfig.newline = msg.count;
|
|
}
|
|
if (msg.hasOwnProperty("flush") && msg.flush === true) { node.port.serial.flush(); }
|
|
node.status({fill:"yellow",shape:"dot",text:"serial.status.waiting"});
|
|
node.port.enqueue(msg,node,function(err,res) {
|
|
if (err) {
|
|
var errmsg = err.toString().replace("Serialport","Serialport "+node.port.serial.path);
|
|
node.error(errmsg,msg);
|
|
}
|
|
});
|
|
});
|
|
|
|
// Serial In
|
|
this.port.on('data', function(msgout, sender) {
|
|
// serial request will only process incoming data pertaining to its own request (i.e. when it's at the head of the queue)
|
|
if (sender !== node) { return; }
|
|
node.status({fill:"green",shape:"dot",text:"node-red:common.status.ok"});
|
|
msgout.status = "OK";
|
|
node.send(msgout);
|
|
});
|
|
this.port.on('timeout', function(msgout, sender) {
|
|
if (sender !== node) { return; }
|
|
msgout.status = "ERR_TIMEOUT";
|
|
node.status({fill:"red",shape:"ring",text:"serial.status.timeout"});
|
|
node.send(msgout);
|
|
});
|
|
|
|
// Common part
|
|
node.port.on('ready', function() {
|
|
node.status({fill:"green",shape:"dot",text:"node-red:common.status.connected"});
|
|
});
|
|
node.port.on('closed', function() {
|
|
node.status({fill:"red",shape:"ring",text:"node-red:common.status.not-connected"});
|
|
});
|
|
}
|
|
else {
|
|
this.error(RED._("serial.errors.missing-conf"));
|
|
}
|
|
|
|
this.on("close", function(done) {
|
|
if (this.serialConfig) {
|
|
serialPool.close(this.serialConfig.serialport,done);
|
|
}
|
|
else {
|
|
done();
|
|
}
|
|
});
|
|
}
|
|
RED.nodes.registerType("serial request", SerialRequestNode);
|
|
|
|
var serialPool = (function() {
|
|
var connections = {};
|
|
return {
|
|
get:function(serialConfig) {
|
|
// make local copy of configuration -- perhaps not needed?
|
|
var port = serialConfig.serialport,
|
|
baud = serialConfig.serialbaud,
|
|
databits = serialConfig.databits,
|
|
parity = serialConfig.parity,
|
|
stopbits = serialConfig.stopbits,
|
|
newline = serialConfig.newline,
|
|
spliton = serialConfig.out,
|
|
waitfor = serialConfig.waitfor,
|
|
binoutput = serialConfig.bin,
|
|
addchar = serialConfig.addchar,
|
|
responsetimeout = serialConfig.responsetimeout;
|
|
var id = port;
|
|
// just return the connection object if already have one
|
|
// key is the port (file path)
|
|
if (connections[id]) { return connections[id]; }
|
|
|
|
// State variables to be used by the on('data') handler
|
|
var i = 0; // position in the buffer
|
|
// .newline is misleading as its meaning depends on the split input policy:
|
|
// "char" : a msg will be sent after a character with value .newline is received
|
|
// "time" : a msg will be sent after .newline milliseconds
|
|
// "count" : a msg will be sent after .newline characters
|
|
// if we use "count", we already know how big the buffer will be
|
|
var bufSize = (spliton === "count") ? Number(newline): bufMaxSize;
|
|
|
|
waitfor = waitfor.replace("\\n","\n").replace("\\r","\r").replace("\\t","\t").replace("\\e","\e").replace("\\f","\f").replace("\\0","\0"); // jshint ignore:line
|
|
if (waitfor.substr(0,2) == "0x") { waitfor = parseInt(waitfor,16); }
|
|
if (waitfor.length === 1) { waitfor = waitfor.charCodeAt(0); }
|
|
var active = (waitfor === "") ? true : false;
|
|
var buf = new Buffer.alloc(bufSize);
|
|
|
|
var splitc; // split character
|
|
// Parse the split character onto a 1-char buffer we can immediately compare against
|
|
if (newline.substr(0,2) == "0x") {
|
|
splitc = new Buffer.from([newline]);
|
|
}
|
|
else {
|
|
splitc = new Buffer.from(newline.replace("\\n","\n").replace("\\r","\r").replace("\\t","\t").replace("\\e","\e").replace("\\f","\f").replace("\\0","\0")); // jshint ignore:line
|
|
}
|
|
if (addchar === true) { addchar = splitc; }
|
|
addchar = addchar.replace("\\n","\n").replace("\\r","\r").replace("\\t","\t").replace("\\e","\e").replace("\\f","\f").replace("\\0","\0"); // jshint ignore:line
|
|
if (addchar.substr(0,2) == "0x") { addchar = new Buffer.from([addchar]); }
|
|
connections[id] = (function() {
|
|
var obj = {
|
|
_emitter: new events.EventEmitter(),
|
|
serial: null,
|
|
_closing: false,
|
|
tout: null,
|
|
queue: [],
|
|
on: function(a,b) { this._emitter.on(a,b); },
|
|
close: function(cb) { this.serial.close(cb); },
|
|
encodePayload: function (payload) {
|
|
if (!Buffer.isBuffer(payload)) {
|
|
if (typeof payload === "object") {
|
|
payload = JSON.stringify(payload);
|
|
}
|
|
else {
|
|
payload = payload.toString();
|
|
}
|
|
if ((spliton === "char") && (addchar !== "")) { payload += addchar; }
|
|
}
|
|
else if ((spliton === "char") && (addchar !== "")) {
|
|
payload = Buffer.concat([payload,addchar]);
|
|
}
|
|
return payload;
|
|
},
|
|
write: function(m,cb) { this.serial.write(m,cb); },
|
|
enqueue: function(msg,sender,cb) {
|
|
var payload = this.encodePayload(msg.payload);
|
|
var qobj = {
|
|
sender: sender,
|
|
msg: msg,
|
|
payload: payload,
|
|
cb: cb,
|
|
}
|
|
this.queue.push(qobj);
|
|
// If we're enqueing the first message in line,
|
|
// we shall send it right away
|
|
if (this.queue.length === 1) {
|
|
this.writehead();
|
|
}
|
|
},
|
|
writehead: function() {
|
|
if (!this.queue.length) { return; }
|
|
var qobj = this.queue[0];
|
|
this.write(qobj.payload,qobj.cb);
|
|
var msg = qobj.msg;
|
|
var timeout = msg.timeout || responsetimeout;
|
|
this.tout = setTimeout(function () {
|
|
this.tout = null;
|
|
var msgout = obj.dequeue() || {};
|
|
msgout.port = port;
|
|
// if we have some leftover stuff, just send it
|
|
if (i !== 0) {
|
|
var m = buf.slice(0,i);
|
|
m = Buffer.from(m);
|
|
i = 0;
|
|
if (binoutput !== "bin") { m = m.toString(); }
|
|
msgout.payload = m;
|
|
}
|
|
/* Notify the sender that a timeout occurred */
|
|
obj._emitter.emit('timeout',msgout,qobj.sender);
|
|
}, timeout);
|
|
},
|
|
dequeue: function() {
|
|
// if we are trying to dequeue stuff from an
|
|
// empty queue, that's an unsolicited message
|
|
if (!this.queue.length) { return null; }
|
|
var msg = Object.assign({}, this.queue[0].msg);
|
|
msg = Object.assign(msg, {
|
|
request_payload: msg.payload,
|
|
request_msgid: msg._msgid,
|
|
});
|
|
delete msg.payload;
|
|
if (this.tout) {
|
|
clearTimeout(obj.tout);
|
|
obj.tout = null;
|
|
}
|
|
this.queue.shift();
|
|
this.writehead();
|
|
return msg;
|
|
},
|
|
}
|
|
//newline = newline.replace("\\n","\n").replace("\\r","\r");
|
|
var olderr = "";
|
|
var setupSerial = function() {
|
|
obj.serial = new serialp(port,{
|
|
baudRate: baud,
|
|
dataBits: databits,
|
|
parity: parity,
|
|
stopBits: stopbits,
|
|
//parser: serialp.parsers.raw,
|
|
autoOpen: true
|
|
}, function(err, results) {
|
|
if (err) {
|
|
if (err.toString() !== olderr) {
|
|
olderr = err.toString();
|
|
RED.log.error(RED._("serial.errors.error",{port:port,error:olderr}));
|
|
}
|
|
obj.tout = setTimeout(function() {
|
|
setupSerial();
|
|
}, settings.serialReconnectTime);
|
|
}
|
|
});
|
|
obj.serial.on('error', function(err) {
|
|
RED.log.error(RED._("serial.errors.error",{port:port,error:err.toString()}));
|
|
obj._emitter.emit('closed');
|
|
if (obj.tout) { clearTimeout(obj.tout); }
|
|
obj.tout = setTimeout(function() {
|
|
setupSerial();
|
|
}, settings.serialReconnectTime);
|
|
});
|
|
obj.serial.on('close', function() {
|
|
if (!obj._closing) {
|
|
RED.log.error(RED._("serial.errors.unexpected-close",{port:port}));
|
|
obj._emitter.emit('closed');
|
|
if (obj.tout) { clearTimeout(obj.tout); }
|
|
obj.tout = setTimeout(function() {
|
|
setupSerial();
|
|
}, settings.serialReconnectTime);
|
|
}
|
|
});
|
|
obj.serial.on('open',function() {
|
|
olderr = "";
|
|
RED.log.info(RED._("serial.onopen",{port:port,baud:baud,config: databits+""+parity.charAt(0).toUpperCase()+stopbits}));
|
|
if (obj.tout) { clearTimeout(obj.tout); obj.tout = null; }
|
|
//obj.serial.flush();
|
|
obj._emitter.emit('ready');
|
|
});
|
|
|
|
obj.serial.on('data',function(d) {
|
|
function emitData(data) {
|
|
if (active === true) {
|
|
var m = Buffer.from(data);
|
|
var last_sender = null;
|
|
if (obj.queue.length) { last_sender = obj.queue[0].sender; }
|
|
if (binoutput !== "bin") { m = m.toString(); }
|
|
var msgout = obj.dequeue() || {};
|
|
msgout.payload = m;
|
|
msgout.port = port;
|
|
obj._emitter.emit('data', msgout, last_sender);
|
|
}
|
|
active = (waitfor === "") ? true : false;
|
|
}
|
|
|
|
for (var z=0; z<d.length; z++) {
|
|
var c = d[z];
|
|
if (c === waitfor) { active = true; }
|
|
// handle the trivial case first -- single char buffer
|
|
if (!active) { return; }
|
|
if ((newline === 0)||(newline === "")) {
|
|
emitData(new Buffer.from([c]));
|
|
continue;
|
|
}
|
|
|
|
// save incoming data into local buffer
|
|
buf[i] = c;
|
|
i += 1;
|
|
|
|
// do the timer thing
|
|
if (spliton === "time" || spliton === "interbyte") {
|
|
// start the timeout at the first character in case of regular timeout
|
|
// restart it at the last character of the this event in case of interbyte timeout
|
|
if ((spliton === "time" && i === 1) ||
|
|
(spliton === "interbyte" && z === d.length-1)) {
|
|
// if we had a response timeout set, clear it:
|
|
// we'll emit at least 1 character at some point anyway
|
|
if (obj.tout) {
|
|
clearTimeout(obj.tout);
|
|
obj.tout = null;
|
|
}
|
|
obj.tout = setTimeout(function () {
|
|
obj.tout = null;
|
|
emitData(buf.slice(0, i));
|
|
i=0;
|
|
}, newline);
|
|
}
|
|
}
|
|
// count bytes into a buffer...
|
|
else if (spliton === "count") {
|
|
newline = serialConfig.newline;
|
|
if ( i >= parseInt(newline)) {
|
|
emitData(buf.slice(0,i));
|
|
i=0;
|
|
}
|
|
}
|
|
// look to match char...
|
|
else if (spliton === "char") {
|
|
if ((c === splitc[0]) || (i === bufMaxSize)) {
|
|
emitData(buf.slice(0,i));
|
|
i=0;
|
|
}
|
|
}
|
|
}
|
|
});
|
|
// obj.serial.on("disconnect",function() {
|
|
// RED.log.error(RED._("serial.errors.disconnected",{port:port}));
|
|
// });
|
|
}
|
|
setupSerial();
|
|
return obj;
|
|
}());
|
|
return connections[id];
|
|
},
|
|
close: function(port,done) {
|
|
if (connections[port]) {
|
|
if (connections[port].tout != null) {
|
|
clearTimeout(connections[port].tout);
|
|
}
|
|
connections[port]._closing = true;
|
|
try {
|
|
connections[port].close(function() {
|
|
RED.log.info(RED._("serial.errors.closed",{port:port}));
|
|
done();
|
|
});
|
|
}
|
|
catch(err) { }
|
|
delete connections[port];
|
|
}
|
|
else {
|
|
done();
|
|
}
|
|
}
|
|
}
|
|
}());
|
|
|
|
RED.httpAdmin.get("/serialports", RED.auth.needsPermission('serial.read'), function(req,res) {
|
|
serialp.list(function (err, ports) {
|
|
res.json(ports);
|
|
});
|
|
});
|
|
}
|