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35-arduino.js
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module.exports = function(RED) {
"use strict";
var Board = require('firmata');
var SP = require('serialport');
// The Board Definition - this opens (and closes) the connection
function ArduinoNode(n) {
RED.nodes.createNode(this,n);
this.device = n.device || null;
this.running = false;
this.reported = false;
var node = this;
var startup = function() {
node.board = new Board(node.device, function(e) {
if ((e !== undefined) && (e.toString().indexOf("cannot open") !== -1) ) {
if (node.reported === false) {
node.error(RED._("arduino.errors.portnotfound",{device:node.device}));
node.reported = true;
}
}
else if (e === undefined) {
node.running = true;
node.reported = false;
node.board.once('ready', function() {
node.log(RED._("arduino.status.connected",{device:node.board.sp.path}));
if (RED.settings.verbose) {
node.log(RED._("arduino.status.version",{version:node.board.firmware.name+"-"+node.board.version.major+"."+node.board.version.minor}));
}
});
node.board.once('close', function() {
node.error(RED._("arduino.status.portclosed"));
});
node.board.once('disconnect', function() {
if (node.running === true) { setTimeout(function() { node.running = false; startup(); }, 5000); }
});
}
});
setTimeout(function() { if (node.running === false) { startup(); } }, 5000);
};
startup();
node.on('close', function(done) {
node.running = false;
if (node.board) {
try {
node.board.transport.close(function() {
if (RED.settings.verbose) { node.log(RED._("arduino.status.portclosed")); }
done();
});
}
catch(e) { done(); }
}
else { done(); }
});
}
RED.nodes.registerType("arduino-board",ArduinoNode);
// The Input Node
function DuinoNodeIn(n) {
RED.nodes.createNode(this,n);
this.buttonState = -1;
this.pin = n.pin;
this.state = n.state;
this.arduino = n.arduino;
this.serverConfig = RED.nodes.getNode(this.arduino);
this.running = false;
var node = this;
if (typeof this.serverConfig === "object") {
var startup = function() {
node.board = node.serverConfig.board;
node.board.setMaxListeners(0);
node.oldval = "";
node.status({fill:"grey",shape:"ring",text:"node-red:common.status.connecting"});
var doit = function() {
node.running = true;
if (node.state === "ANALOG") { node.board.pinMode(node.pin, 0x02); }
if (node.state === "INPUT") { node.board.pinMode(node.pin, 0x00); }
if (node.state === "PULLUP") { node.board.pinMode(node.pin, 0x0B); }
node.status({fill:"green",shape:"dot",text:"node-red:common.status.connected"});
if (node.state === "ANALOG") {
node.board.analogRead(node.pin, function(v) {
if (v !== node.oldval) {
node.oldval = v;
node.send({payload:v, topic:"A"+node.pin});
}
});
}
if (node.state === "INPUT") {
node.board.digitalRead(node.pin, function(v) {
if (v !== node.oldval) {
node.oldval = v;
node.send({payload:v, topic:node.pin});
}
});
}
if (node.state === "PULLUP") {
node.board.digitalRead(node.pin, function(v) {
if (v !== node.oldval) {
node.oldval = v;
node.send({payload:v, topic:node.pin});
}
});
}
if (node.state == "STRING") {
node.board.on('string', function(v) {
if (v !== node.oldval) {
node.oldval = v;
node.send({payload:v, topic:"string"});
}
});
}
node.board.once('disconnect', function() {
node.status({fill:"red",shape:"ring",text:"node-red:common.status.not-connected"});
if (node.running) { setTimeout(function() { node.running = false; startup(); }, 5500); }
});
}
if (node.board.isReady) { doit(); }
else { node.board.once("ready", function() { doit(); }); }
setTimeout(function() { if (node.running === false) { startup(); } }, 4500);
}
startup();
}
else {
node.warn(RED._("arduino.errors.portnotconf"));
}
node.on('close', function() {
node.running = false;
});
}
RED.nodes.registerType("arduino in",DuinoNodeIn);
// The Output Node
function DuinoNodeOut(n) {
RED.nodes.createNode(this,n);
this.buttonState = -1;
this.pin = n.pin;
this.state = n.state;
this.arduino = n.arduino;
this.serverConfig = RED.nodes.getNode(this.arduino);
this.running = false;
var node = this;
if (typeof node.serverConfig === "object") {
var startup = function() {
node.board = node.serverConfig.board;
node.board.setMaxListeners(0);
node.status({fill:"grey",shape:"ring",text:"node-red:common.status.connecting"});
var doit = function() {
node.running = true;
if (node.state === "OUTPUT") { node.board.pinMode(node.pin, 0x01); }
if (node.state === "PWM") { node.board.pinMode(node.pin, 0x03); }
if (node.state === "SERVO") { node.board.pinMode(node.pin, 0x04); }
node.status({fill:"green",shape:"dot",text:"node-red:common.status.connected"});
node.on("input", function(msg) {
if (node.board.isReady) {
if (node.state === "OUTPUT") {
if ((msg.payload === true)||(msg.payload.toString() == "1")||(msg.payload.toString().toLowerCase() == "on")) {
node.board.digitalWrite(node.pin, node.board.HIGH);
}
if ((msg.payload === false)||(msg.payload.toString() == "0")||(msg.payload.toString().toLowerCase() == "off")) {
node.board.digitalWrite(node.pin, node.board.LOW);
}
}
if (node.state === "PWM") {
msg.payload = parseInt((msg.payload * 1) + 0.5);
if ((msg.payload >= 0) && (msg.payload <= 255)) {
node.board.analogWrite(node.pin, msg.payload);
}
}
if (node.state === "SERVO") {
msg.payload = parseInt((msg.payload * 1) + 0.5);
if ((msg.payload >= 0) && (msg.payload <= 180)) {
node.board.servoWrite(node.pin, msg.payload);
}
}
if (node.state === "SYSEX") {
node.board.sysexCommand(msg.payload);
}
if (node.state === "STRING") {
node.board.sendString(msg.payload.toString());
}
}
});
node.board.once('disconnect', function() {
node.status({fill:"red",shape:"ring",text:"node-red:common.status.not-connected"});
if (node.running === true) { setTimeout(function() { node.running = false; startup(); }, 5500); }
});
}
if (node.board.isReady) { doit(); }
else { node.board.once("ready", function() { doit(); }); }
setTimeout(function() { if (node.running === false) { startup(); } }, 4500);
}
startup();
}
else {
node.warn(RED._("arduino.errors.portnotconf"));
}
node.on('close', function() {
node.running = false;
});
}
RED.nodes.registerType("arduino out",DuinoNodeOut);
RED.httpAdmin.get("/arduinoports", RED.auth.needsPermission("arduino.read"), function(req,res) {
SP.list().then(
ports => {
const a = ports.map(p => p.comName);
res.json(a);
},
err => {
this.log('Error listing serial ports', err)
}
)
});
}