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

const char* ssid     = "XXXXXXXXXXXXX";
const char* password = "XXXXXXXXXXXXX";

const int SENSOR_PIN = D4;  // Arduino pin connected to DS18B20 sensor's DQ pin

OneWire oneWire(SENSOR_PIN);             // setup a oneWire instance
DallasTemperature tempSensor(&oneWire);  // pass oneWire to DallasTemperature library

int status = WL_IDLE_STATUS;

WiFiServer server(80);

float getTemperature() {
  tempSensor.requestTemperatures();                   // send the command to get temperatures
  float tempCelsius = tempSensor.getTempCByIndex(0);  // read temperature in Celsius
  return tempCelsius;
}

void setup() {
  //Initialize serial and wait for port to open:
  Serial.begin(115200);
  tempSensor.begin(); // initialize the temperature sensor

  WiFi.begin(ssid, password);

  //vérifie que le wi-fi est connecté au réseau wi-fi
  while (WiFi.status() != WL_CONNECTED) {
  delay(1000);
  Serial.print(".");
  }
  Serial.println("");
  Serial.println("WiFi connecte!");
  Serial.print("Votre adresse IP: ");  Serial.println(WiFi.localIP());

  server.begin();
  Serial.println("Serveur HTTP demarre");
  }
  //server.begin();
  // you're connected now, so print out the status:
  //printWifiStatus();

void loop() {
  // listen for incoming clients
  //float temperature = getTemperature();
  //Serial.println(temperature, 2);
  WiFiClient client = server.available();
  if (client) {
    // read the HTTP request header line by line
    while (client.connected()) {
      if (client.available()) {
        String HTTP_header = client.readStringUntil('\n');  // read the header line of HTTP request

        if (HTTP_header.equals("\r"))  // the end of HTTP request
          break;

        Serial.print("<< ");
        Serial.println(HTTP_header);  // print HTTP request to Serial Monitor
      }
    }

    // send the HTTP response
    // send the HTTP response header
    client.println("HTTP/1.1 200 OK");
    client.println("Content-Type: text/html");
    client.println("Connection: close");  // the connection will be closed after completion of the response
    client.println();                     // the separator between HTTP header and body
    // send the HTTP response body
    float temperature = getTemperature();
    client.print(temperature, 2);
    client.flush();
    delay(10);
    client.stop();
    printWifiStatus();
  }

}

void printWifiStatus() {
  // print your board's IP address:
  Serial.print("IP Address: ");
  Serial.println(WiFi.localIP());

  // print the received signal strength:
  Serial.print("signal strength (RSSI):");
  Serial.print(WiFi.RSSI());
  Serial.println(" dBm");
}