Mongoose OS DHT11 MQTT temperature and humidity reporter

mqtt-dht11.js

load('api_config.js');
load('api_events.js');
load('api_gpio.js');
load('api_mqtt.js');
load('api_net.js');
load('api_sys.js');
load('api_esp8266.js');
load('api_dht.js');
load('api_timer.js');

let millisToTurnOff = 30e3;
let sleepFor = 60e6; // microseconds

let pin = 2;
let dht = DHT.create(pin, DHT.DHT11);
let tempTopic = Cfg.get('mqtt.user') + '/feeds/home.temperature';
let humTopic = Cfg.get('mqtt.user') + '/feeds/home.humidity';

let getInfo = function() {
   return JSON.stringify({
     total_ram: Sys.total_ram(),
     free_ram: Sys.free_ram()
   });
};

let getHumidity = function() {
  let h = dht.getHumidity();
  if (isNaN(h)) {
    print('Failed to get humidity');
    return;
  }
  let ok = MQTT.pub(humTopic, JSON.stringify(h), 1);
	if(ok) {
	  print('sent humidity mqtt');
	}	else {
	  print('failed humidity mqtt');
	}
};

let getTemperature = function() {
  let t = dht.getTemp();
  if (isNaN(t)) {
    print('Failed to get temperature');
    return;
  }
  let ok = MQTT.pub(tempTopic, JSON.stringify(t), 1);
	if(ok) {
	  print('sent temperature mqtt');
	} else {
	  print('failed temperature mqtt');
	}
};

MQTT.setEventHandler(function(conn, ev, edata) 
{
	if (ev === MQTT.EV_CONNACK)
	{
    Timer.set(2000 /* milliseconds */, false, function() {
      getTemperature();
    	getHumidity();
    	MQTT.setEventHandler(function() {}, null);
    }, null);
	}
}, null);



Timer.set(millisToTurnOff , false , function() {
  print("deep sleep", getInfo());
  ESP8266.deepSleep(sleepFor);
}, millisToTurnOff);