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node-red/nodes/hardware/35-arduino.js
2013-09-05 15:02:48 +01:00

168 lines
4.7 KiB
JavaScript

/**
* Copyright 2013 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
**/
var RED = require("../../red/red");
var util = require("util");
var firmata = require("firmata");
var arduinoReady = false;
var thisboard = null;
// The Board Definition - this opens (and closes) the connection
function ArduinoNode(n) {
RED.nodes.createNode(this,n);
this.device = n.device;
this.repeat = n.repeat||25;
util.log("[firmata] Opening"+this.device);
// var tou = setInterval(function() {
// if (!arduinoReady) {
// clearInterval(tou);
arduinoReady = false;
if (thisboard == null) {
this.board = new firmata.Board(this.device, function(err) {
if (err) {
util.log("[firmata] "+err);
return;
}
arduinoReady = true;
util.log('[firmata] Arduino connected');
});
thisboard = this.board;
}
else {
util.log("[firmata] Arduino already connected");
this.board = thisboard;
console.log(this.board._events);
this.board.removeAllListeners();
arduinoReady = true;
}
// } else { util.log("[firmata] Waiting for Firmata"); }
// }, 1000); // wait for firmata to disconnect from arduino
this._close = function() {
//this.board.sp.close(function() { console.log("[firmata] Serial port closed"); arduinoReady = false; });
util.log("[firmata] Stopped");
}
}
RED.nodes.registerType("arduino-board",ArduinoNode);
ArduinoNode.prototype.close = function() {
this._close();
}
// 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.board = this.serverConfig.board;
this.repeat = this.serverConfig.repeat;
var node = this;
var tout = setInterval(function() {
if (arduinoReady) {
clearInterval(tout);
console.log(node.state,node.pin,node.board.MODES[node.state]);
node.board.pinMode(node.pin, node.board.MODES[node.state]);
node.board.setSamplingInterval(node.repeat);
var oldrdg = "";
if (node.state == "ANALOG") {
node.board.analogRead(node.pin, function(data) {
var msg = {payload:data, topic:"A"+node.pin};
if (data != oldrdg) {
node.send(msg);
oldrdg = data;
}
});
}
else {
node.board.digitalRead(node.pin, function(data) {
var msg = {payload:data, topic:node.pin};
node.send(msg);
});
}
}
else { node.log("Waiting for Arduino"); }
}, 2000); // loop to wait for firmata to connect to arduino
this._close = function() {
clearInterval(this._interval);
util.log("[firmata] input eventlistener stopped");
}
}
RED.nodes.registerType("arduino in",DuinoNodeIn);
DuinoNodeIn.prototype.close = function() {
this._close();
}
// 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.board = this.serverConfig.board;
var node = this;
this.on("input", function(msg) {
//console.log(msg);
if (arduinoReady) {
if (node.state == "OUTPUT") {
if ((msg.payload == true)||(msg.payload == 1)||(msg.payload.toString().toLowerCase() == "on")) {
node.board.digitalWrite(node.pin, node.board.HIGH);
}
if ((msg.payload == false)||(msg.payload == 0)||(msg.payload.toString().toLowerCase() == "off")) {
node.board.digitalWrite(node.pin, node.board.LOW);
}
}
if (node.state == "PWM") {
msg.payload = msg.payload * 1;
if ((msg.payload >= 0) && (msg.payload <= 255)) {
//console.log(msg.payload, node.pin);
node.board.servoWrite(node.pin, msg.payload);
}
}
if (node.state == "SERVO") {
msg.payload = msg.payload * 1;
if ((msg.payload >= 0) && (msg.payload <= 180)) {
//console.log(msg.payload, node.pin);
node.board.servoWrite(node.pin, msg.payload);
}
}
}
//else { console.log("Arduino not ready"); }
});
var touo = setInterval(function() {
if (arduinoReady) {
clearInterval(touo);
//console.log(node.state,node.pin,node.board.MODES[node.state]);
node.board.pinMode(node.pin, node.board.MODES[node.state]);
}
}, 5000); // loop to wait for firmata to connect to arduino
}
RED.nodes.registerType("arduino out",DuinoNodeOut);