node_helper.js

'use strict';

/* Magic Mirror
 * Module: MMM-ReadHDC1080
 *
 * By Michael F. 
 * 
 */

const NodeHelper = require('node_helper');
const exec = require('child_process').exec;

module.exports = NodeHelper.create({
		 start: function () {
			 console.log('Temperatur helper started ...');
		 },
		 
		 // Subclass socketNotificationReceived received.
		 socketNotificationReceived: function(notification, payload) {
		   const self = this;
		   if (notification === 'REQUEST') {
			   const self = this
			   this.config = payload
			   
			   // execute external HDC1080, read humidity and temp from i2c
			   exec("sudo ./modules/MMM-HDC1080/ReadHDC1080 " + this.config.sensorPIN, (error, stdout) => {
			   if (error) {
				    console.error(`exec error: ${error}`);
				    return;
				  }
			   	  var arr = stdout.split(",");
			   	  
				  //console.log("Log: " + temp + " - " + hum);
				  // Send Temperatur
		          self.sendSocketNotification('DATA',{
						temp: arr[0],
						humidity: arr[1]
				  });
			 });
		   }
		 }
 
});