node-red-contrib-tinkerforge/bricklets/VoltageCurrent.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.
 **/



"use strict";
var Tinkerforge = require('tinkerforge');
var devices = require('../lib/devices');

module.exports = function(RED) {
    function tinkerForgeVoltageCurrent(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.t = new Tinkerforge.BrickletVoltageCurrent(node.sensor, node.ipcon);

            node.interval = setInterval(function() {
                    if (node.t) {

                        node.t.getCurrent(function(current) {
                                var c = {
                                    topic: node.topic || 'current',
                                    payload: current
                                };

                                node.t.getVoltage(function(voltage) {
                                    var v = {
                                        topic: node.topic || 'voltage',
                                        payload: voltage
                                    };

                                    node.t.getPower(function(power) {
                                        var p = {
                                            topic: node.topic || 'power',
                                            payload: power
                                        };

                                    var output = [
                                        [c, v, p]
                                    ];
                                    node.send(output);

                                });

                            });



                            },


                            function(err) {
                                //error
                                node.error("PTC - " + err);
                            });
                    }
                },
                (node.pollTime * 1000));
        });




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

    }

    RED.nodes.registerType('TinkerForge VoltageCurrent', tinkerForgeVoltageCurrent);
};