#include <ESP8266WiFi.h>
#include <PubSubClient.h>
#include <OneWire.h>
#include <DallasTemperature.h>
#include <Streaming.h>

#define SLEEP_DELAY_IN_SECONDS  30
#define ONE_WIRE_BUS            D5      // DS18B20 pin

const char* ssid = "xxxxx";
const char* password = "xxxxxx";

const char* mqtt_server = "192.168.2.113";
const char* mqtt_username = "xxx";
const char* mqtt_password = "xxx";
const char* mqtt_topic = "ha/test/test";
float temperature;

WiFiClient espClient;
PubSubClient client(espClient);

OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature DS18B20(&oneWire);

char temperatureString[6];

void setup() {
  // setup serial port
  Serial.begin(115200);

  // setup WiFi
  setup_wifi();
  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);

  // setup OneWire bus
  DS18B20.begin();
}

void setup_wifi() {
  delay(10);
  // We start by connecting to a WiFi network
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
}

void callback(char* topic, byte* payload, unsigned int length) {
  Serial.print("Message arrived [");
  Serial.print(topic);
  Serial.print("] ");
  for (int i = 0; i < length; i++) {
    Serial.print((char)payload[i]);
  }
  Serial.println();
}

void reconnect() {
  // Loop until we're reconnected
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    // Attempt to connect
    if (client.connect("ESP8266Client", mqtt_username, mqtt_password)) {
      Serial.println("connected");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      // Wait 5 seconds before retrying
      delay(5000);
    }
  }
}

float getTemperature() {

    Serial << "Hämtar temperatur.." << endl;
    float temp;
    DS18B20.requestTemperatures();
    temp = DS18B20.getTempCByIndex(0);
    Serial.print(temp);
    return temp;

}

void loop() {
  if (!client.connected()) {
    reconnect();
  }
  client.loop();
  client.publish(mqtt_topic, "temp2");
  temperature = getTemperature();
  client.publish(mqtt_topic, "temp3");
  client.publish(mqtt_topic, "temp4");

  // konvertera till rätt format
  dtostrf(temperature, 2, 2, temperatureString);


  Serial << "Skickar temperatur: " << temperatureString << endl;
  client.publish(mqtt_topic, temperatureString);

 // Serial << "Closing MQTT connection..." << endl;
  client.disconnect();

 // Serial << "Closing WiFi connection..." << endl;
  WiFi.disconnect();

  delay(100);

  Serial << "Entering deep sleep mode for " << SLEEP_DELAY_IN_SECONDS << " seconds..." << endl;
  ESP.deepSleep(SLEEP_DELAY_IN_SECONDS * 1000000, WAKE_RF_DEFAULT);
  //ESP.deepSleep(10 * 1000, WAKE_NO_RFCAL);
  delay(500);   // wait for deep sleep to happen
}