node-red-contrib-smartnode-dfrobot
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this project dependences the node-red-contrib-smartnode package for basic function. based on the smartnode package, this package provide some sersor nodes for DFRobot sensors.
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JavaScript
/**
* Copyright 2015, 2015 MakerCollider.
*
* 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.
**/
module.exports = function(RED){
var checkPin = require("node-red-contrib-smartnode/extends/check_pin");
var mraa = require("mraa");
function sound(config) {
RED.nodes.createNode(this, config);
this.analogPin = config.analogPin;
this.interval = config.interval;
var node = this;
node.analogPin = node.analogPin>>>0;
var key = 'P'+node.analogPin;
if (checkPin.getAnalogPinValue(key)==1){
node.status({fill: "red", shape: "dot", text: "pin repeat"});
console.log('Sound sensor analog pin ' + node.analogPin +' repeat');
return;
}
else if (checkPin.getAnalogPinValue(key)==0){
checkPin.setAnalogPinValue(key, 1);
node.status({fill: "blue", shape: "ring", text: "pin check pass"});
console.log('Sound sensor analog pin ' + node.analogPin +' OK');
}
else{
node.status({fill: "blue", shape: "ring", text: "Unknown"});
console.log('unknown pin' + node.analogPin + ' key value' + checkPin.getAnalogPinValue(key));
return;
}
var is_on = false;
var waiting;
var sound = new mraa.Aio(node.analogPin);
this.on('input', function(msg) {
//use 'injector' node and pass string to control virtual node
if ((msg.payload === "toggle") || (msg.payload == 1)) {
//switch on
if (is_on == false) {
is_on = true;
waiting = setInterval(readsoundvalue,node.interval);
}
}//switch off
else {
if (is_on == true) {
is_on = false;
node.status({fill: "red", shape: "ring", text: "no signal"});
clearInterval(waiting);
}
}
});
this.on('close', function() {
clearInterval(waiting);
checkPin.initAnalogPin(); //init pin
});
function readsoundvalue()
{
var celSound = sound.readFloat();
if(celSound != 0){
var soundValue = 20 * Math.log(celSound *5 / 0.003)/Math.LN10 -50 + 94 - 20;
var msg = { payload: Math.round(soundValue) };
node.status({fill: "red", shape: "dot", text: "Sound value is " + Math.round(soundValue) + "dB"});
node.send(msg);
}
}
}
RED.nodes.registerType("DF-Sound", sound);
}