iot/src/mqtt.js

//dependencies
var config = require('./setup_const');
var db = require('./db');

var mosca = require('mosca');
var mqtt_settings = {
  port:1883
}

if(typeof credentials!=='undefined')
{
  mqtt_settings.secure = {
    port: 8444,
    keyPath: SECURE_KEY,
    certPath: SECURE_CERT,
  }
}
var mqtt =  new mosca.Server(mqtt_settings);
mqtt.on('ready', function(){
  console.log("MQTT ready on port " + mqtt_settings.port);
})
mqtt.on('clientConnected', function(){
  console.log("MQTT client connected !");
});

var mqtt = require('mqtt');
var mqtt_client  = mqtt.connect('mqtt://'+ config.HomeControllerMQTT);
mqtt_client.on('connect', function () {
  console.log("MQTT connected. subscribing to topics");
  mqtt_client.subscribe('tele/tasmota/STATE');
  mqtt_client.subscribe('tele/tasmota/RESULT');//IR
  mqtt_client.subscribe('tele/tasmota/INFO2');
  // mqtt_client.subscribe('tele/tasmota/SENSOR');//DHT
  mqtt_client.subscribe('tele/+/SENSOR');//DHT
  mqtt_client.subscribe('tasmota_3FD92D');
  // mqtt_client.subscribe('tele');
  // mqtt_client.subscribe('dht');
  // mqtt_client.subscribe('ir');
  
  //	ESP_Easy_0 = garden
  mqtt_client.subscribe('Garden/+');
  mqtt_client.subscribe('Garden/+/+');
  mqtt_client.publish('tasmota', 'controller connected');
});

var dht = {};
// https://github.com/pauloromeira/Sonoff-Tasmota/wiki/Commands
//https://stevessmarthomeguide.com/setting-up-the-sonoff-tasmota-mqtt-switch/
mqtt_client.on('message', function (topic, message) {
  var context = message.toString();
  console.log("MQTT> " + topic + " : " +  context);
  var handled = false;
  if(topic === "tele/tasmota/SENSOR")
  {
    var j = JSON.parse(message);
    //console.log("JSON> " + util.inspect(j));
    if(j.DHT11 && j.DHT11.Humidity !== null)
    {
      var msg = {
        dht:{
          hum: j.DHT11.Humidity,
          temp:  j.DHT11.Temperature,
          dew: j.DHT11.DewPoint
        }
      };

      db.devicemessages.insert( 0, "A23_DHT", JSON.stringify(msg), function (err, data) {
          if (!err) { console.log("success: "+ data);}
          else { console.log("error: " + err); }
        });
    }else {
      console.log("Got wrong DHT data: " + message );
    }
    handled = true;
  }
  if(topic === "Garden/status/LWT")
  {
    //!console.log("Garden >'" + message + "'");
    var stat = {};
    var pairs = message.toString().split(';');
    stat.event = pairs[0];
    for (var i = 0; i < pairs.length; i++)
    {
      var pair = pairs[i].split(':');
      if(pair.length == 2){
        stat[pair[0].trim()] = pair[1].trim() || '';
        //console.log( "'"+pair[0] +"' >'" + pair[1]  + "'");
      }
    }
    dht.ssid=stat["SSID"];
    dht.rssi=stat["RSSI"];
    //if(stat.event ==='ON'){console.log(formatDate(new Date()) + "Device is ONLINE! <" + dht.ssid + "> " + dht.rssi + "dB" );}
    //if(stat.event ==='OFF'){console.log(formatDate(new Date()) + "Device went ofline!");}
    handled = true;
  }
  if(topic === "Garden/Soil/RH")
  {
    //console.log("Garden > soil " + message + "% moisture");
    dht.Soil = message.toString();
    if(dht.Soil > 10){
      SaveDhtIf();
    } else {
      console.log("Got suspicious soil RH value:" + dht.Soil);
      //dht.Soil = 0;
    }
    SaveDhtIf();
    handled = true;
  }
  if(topic === "Garden/bmp/Temperature")
  {
    dht.Temp = message.toString();
    console.log("Garden > air " + dht.Temp + " C");
    SaveDhtIf();
    handled = true;
  }
  if(topic === "Garden/bmp/Humidity")
  {
    dht.Hum = message.toString();
    console.log("Garden > air " + dht.Hum + "% RH");
    SaveDhtIf();
    handled = true;
  }
  if(topic === "Garden/bmp/Pressure")
  {
    dht.Pres = message.toString();
    console.log("Garden > air " + dht.Pres + " hPa");
    SaveDhtIf();
    handled = true;
  }
  if(topic === "Garden/Water/start")
  {
    var j = JSON.parse(message);
    dht.Soil = j.soil;
    SaveDhtIf();
    handled = true;
    console.log(formatDate(new Date()) + "Garden > Started watering at "+j.time+"(GMT) with " + j.soil + "% soil RH");
  }
  if(topic === "Garden/Water/stop")
  {
    var j = JSON.parse(message);
    dht.Soil = j.soil;
    SaveDhtIf();
    handled = true;
    console.log(formatDate(new Date()) + "Garden > Finished watering at "+j.time+"(GMT) with " + j.soil + "% soil RH");
  }

  if(!handled){
    console.log(topic + " > " + message );
  }
});
function SaveDhtIf(){
  if(dht.Temp && dht.Hum && dht.Pres)// && dht.Soil
  {
    // if(dht.Soil && dht.Soil < 5)
    // {
    //   console.log("Soil reported below 5%! Probable loose sensor wire. Record discarded" );
    //   dht = {};
    //   return;
    // }
    var msg = JSON.stringify(dht);
    db.devicemessages.insert(1, "A23_Garden_dht", msg, function (err, data) {
      if (!err) {
        console.log("Saved to DB > ["+ data.id +"]:" + msg);//+"; SSID: '"+dht.ssid+"' RSSI:"+ dht.rssi + "dB");
      }
      else { console.log("error: " + err); }
    });
    dht = {};
  }else{
    console.log("T: %s; H: %s; P: $s", dht.Temp, dht.Hum, dht.Pres);
  //  if(dht.Temp ){console.log("have Temp");}
  //  if(dht.Hum ){console.log("have Hum");}
  //  if(dht.Pres ){console.log("have Pres");}
   console.log("Missing all data to write to DB !");
  }
}