#include <ESP8266WiFi.h>
#include <PubSubClient.h>

#include <OneWire.h>
#include <DallasTemperature.h>


// #define DEBUG

const char* ssid = "EG-WLAN";
const char* password = "shae3sheuthai2oluNgiqueiyahyumeiphughi8jequeil6taethooyeik1joh5";
const char* mqttServer = "172.16.2.15";
//const char* ssid = "WLan-KI-Pro";
//const char* password = "sVAPHCmo";
//const char* mqttServer = "10.11.184.91";

const uint16_t sleepTime = 300;


WiFiClient espClient;
PubSubClient client(espClient);


#define ONE_WIRE_BUS 2
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);


uint32_t startTime = 0;

void setup() {
  startTime = millis();
#ifdef DEBUG  
  Serial.begin(115200);
  Serial.println("Starting ...");
#endif

  setup_wifi();
  client.setServer(mqttServer, 1883);
  
  sensors.begin();
  uint8_t num = sensors.getDeviceCount();
#ifdef DEBUG  
  Serial.print("device count: ");
  Serial.println(num);
#endif

  sensors.setResolution(12);

#ifdef DEBUG
  Serial.println("Started.");
#endif

  mqtt_connect();
  read_thermometer();

#ifdef DEBUG
  Serial.println("Sleeping");
#endif  
  ESP.deepSleep(sleepTime * 1000000);

}

void setup_wifi() {

  delay(10);
  // We start by connecting to a WiFi network
#ifdef DEBUG  
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);
#endif

  WiFi.begin(ssid, password);

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

#ifdef DEBUG
  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
#endif  
}

void reconnect() {
  // Loop until we're reconnected
  while (!client.connected()) {
#ifdef DEBUG    
    Serial.print("Attempting MQTT connection...");
#endif    
    // Attempt to connect
    if (client.connect("ESP8266Client2")) {
#ifdef DEBUG      
      Serial.println("connected");
#endif      
      // Once connected, publish an announcement...
      //client.publish("IoT/espThermometer/status", "hello world");
    } else {
#ifdef DEBUG      
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
#endif      
      // Wait 5 seconds before retrying
      delay(5000);
    }
  }
}


void mqtt_connect() {
  if (!client.connected()) {
    reconnect();
  }
  client.loop();
}


void read_thermometer() {
    sensors.requestTemperatures();
  
    float t = sensors.getTempCByIndex(0);
#ifdef DEBUG    
    Serial.print(t);
    Serial.println();  
#endif

    int16_t t1 = (int)t;
    int16_t t2 = (int)((t - t1)*100);

    uint32_t duration = millis() - startTime;

    
    char topic[128];
    snprintf(topic, 127, "IoT/espThermometer2/%s/measurement", WiFi.macAddress().c_str());
    char payload[128];
    snprintf(payload, 127, "%d.%d %ld", t1, t2, duration);
    client.publish(topic, payload, true);
    
  
}

void loop() {
}