// *  Server_ESP32_wifi_for_Processing_client_220119

// *  Ce serveur lit 2 sondes de température et envoie leurs valeurs via WiFi 
// *  sur le reseau local où un PC/RPI sour Processing les reçoit et les affiche
// *  Si aucuner sonde n'est connectée, en general on trouve 127 comme valeur
// *  Une fois lancé, executer le code client 
// *  "Processing_client_for_ESP32_server220119.pde"
// *  sur un PC (ou RPI) sur le reseau local et sous Processing  
 /* ref Rui Santos pour le sketch d'origine
  Complete project details at http://randomnerdtutorials.com 
  Adapté pour deux sondes de température onewire 
*********/

// Including the ESP8266 WiFi library
//#include <ESP8266WiFi.h>  //Au choix
#include "WiFi.h"
#include <OneWire.h>
#include <DallasTemperature.h>

// Replace with your network details
const char* ssid = "xxxx";           // Identifiant WiFi
const char* password = "xxx"; 

  float tempA;
  float tempB;

// Data wire is plugged into pin on the ESP8266 1E - GPIO 2
#define ONE_WIRE_BUS 2

// Setup a oneWire instance to communicate with any OneWire devices (not just Maxim/Dallas temperature ICs)
OneWire oneWire(ONE_WIRE_BUS);

// Pass our oneWire reference to Dallas Temperature. 
DallasTemperature DS18B20(&oneWire);
String temperatureAString;
String temperatureBString;

int total_Sensors;

// Web Server on port 12345
WiFiServer server(12345);

void setup() {
  // Initializing serial port for debugging purposes
  Serial.begin(115200);
  delay(100);
   // Start up the library
  DS18B20.begin();
  delay(100);
// locate devices on the bus
  Serial.print("Found ");
   Serial.print(DS18B20.getDeviceCount(), DEC);
  Serial.println(" devices.");

    pinMode (2,INPUT);
    pinMode (5, OUTPUT);
  delay(10);

  //DS18B20.begin(); // IC Default 9 bit. If you have troubles consider upping it 12. Ups the delay giving the IC more time to process the temperature measurement
  
  // Connecting to 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");
  
  // Starting the web server
  server.begin();
  Serial.println("Web server running. Waiting for the ESP IP...");
  delay(10000);
  
  // Printing the ESP IP address
  Serial.println(WiFi.localIP());

}

void getTemperature() {
    
     total_Sensors = DS18B20.getDeviceCount();
     DS18B20.requestTemperatures(); // request to all devices on the bus
     tempA = DS18B20.getTempCByIndex(0);
     //dtostrf(tempA, 2, 2, temperatureAString);
     temperatureAString= String(tempA);
     tempB = DS18B20.getTempCByIndex(1);
     temperatureBString= String(tempB);
     
    delay(80); //100?
 }


void loop() {
  // Listenning for new clients

  digitalWrite ( 05,HIGH);
  
  WiFiClient client = server.available();
  
  if (client) {
    Serial.println("New client");
    // bolean to locate when the http request ends
    boolean blank_line = true;
    while (client.connected()) {
    getTemperature();
    digitalWrite ( 05,LOW);
     Serial.println("get temperature");
                       
        
client.println("A" + temperatureAString);
Serial.println("A" + temperatureAString);
client.println("B" + temperatureBString);
Serial.println("B" + temperatureBString);
 
            break;
        }

    // closing the client connection
    delay(1);
    //client.stop();
    Serial.println("Client disconnected.");
  }
}   
}