node-red-contrib-tinkerforge/bricklets/CO2.js

Node-RED nodes to access Tinkerforge sensors

/**
 * Copyright 2017 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 Tinkerforge = require('tinkerforge');
var devices = require('../lib/devices');

module.exports = function(RED) {
	"use strict";

    function tinkerForgeCO2(n) {
        RED.nodes.createNode(this,n);
        this.device = n.device;
        this.sensor = n.sensor;
        this.name = n.name;
        this.topic = n.topic;
        this.pollTime = n.pollTime;
        var node = this;

        node.ipcon = new Tinkerforge.IPConnection(); //devices[this.device].ipcon;
        node.ipcon.setAutoReconnect(true);
        var devs = devices.getDevices();
        node.ipcon.connect(devs[node.device].host, devs[node.device].port,function(error){
            if(error) {
                node.warn("couldn't connect");
            };
        });

        node.ipcon.on(Tinkerforge.IPConnection.CALLBACK_CONNECTED,
        function(connectReason) {
            node.co2 = new Tinkerforge.BrickletCO2(node.sensor,node.ipcon);

            node.interval = setInterval(function(){
            	if (node.co2) {
            		node.co2.getCO2Concentration(function(co2Concentration){
            			node.send({
                            topic: node.topic || 'co2',
                            payload: co2Concentration
                        });
            		}, function(err) {
            			//error
                        if (err == 31) {
                            node.error("Not connected");
                        }
            		});
            	}
            }, node.pollTime);
        });

        node.on('close',function() {
            node.ipcon.disconnect();
            clearInterval(node.interval);
        });
    }

    RED.nodes.registerType('TinkerForge CO2', tinkerForgeCO2);
};