// esp8266_test.ino
//
// Plot LM35 data on thingspeak.com using an Arduino and an ESP8266 WiFi
// module.
#include <SoftwareSerial.h>
#include <stdlib.h>

#define DEBUG true
String NomduReseauWifi = "Livebox-37cc"; // Garder les guillements

String MotDePasse      = "8A6060920A8A86896F770F2C47"; // Garder les guillements

// LED
int ledPin = 13;
// LM35 analog input
int lm35Pin = A0;

// replace with your channel's thingspeak API key
String apiKey = "ZP1PZO62773HXWVU";

// connect 10 to TX of Serial USB
// connect 11 to RX of serial USB
SoftwareSerial ESP8266(10, 11); // RX, TX

// this runs once
void setup() {

  #ifdef DEBUG
  Serial.begin(9600);
#endif
    // initialize the digital pin as an output.
    pinMode(ledPin, OUTPUT);
    
  ESP8266.begin(115200);

  envoieAuESP8266("AT+RST");
  recoitDuESP8266(2000);

  envoieAuESP8266("AT+CIOBAUD=9600");
  recoitDuESP8266(2000);


  ESP8266.begin(9600);

  
}
// the loop
void loop() {
initESP8266();

  // blink LED on board
  digitalWrite(ledPin, HIGH);
  delay(200);
  digitalWrite(ledPin, LOW);
  
  // read the value from LM35.
  // read 10 values for averaging.
  int val = 0;
//  for(int i = 0; i < 10; i++) {
//    val += analogRead(lm35Pin);
//    delay(500);
//  }
  
  // convert to temp:
  // temp value is in 0-1023 range
  // LM35 outputs 10mV/degree C. ie, 1 Volt => 100 degrees C
  // So Temp = (avg_val/1023)*5 Volts * 100 degrees/Volt
  float temp = val*50.0f/1023.0f;
  
  // convert to string
  char buf[16];
  String strTemp = dtostrf(temp, 4, 1, buf);
  
  Serial.println("Temp " + strTemp);
  
  // TCP connection
  debugPrintln("***************** GET ******************************");
  String cmd = "AT+CIPSTART=4,\"TCP\",\"192.168.0.10\",8080";
  envoieAuESP8266(cmd);
  recoitDuESP8266(2000);
  
//  if(ESP8266.find("Error")){
//    Serial.println("AT+CIPSTART error");
//    return;
//  }
  
  // prepare GET string
//  String cmdGet = "GET /update?api_key=";
//  cmdGet += apiKey;
//  cmdGet +="&field1=";
//  cmdGet += String(strTemp);
//  cmdGet += "\r\n\r\n";

  String url = "/json.htm?type=command&param=udevice&idx=158&svalue=255";
  
  String cmdGet = "GET " + url + " HTTP/1.1\r\n"
                  + "Host: 192.168.0.10\r\nUser-Agent: ESP8266_HTTP_Client\r\nConnection: close\r\n\r\n";

  debugPrintln("***************Commande GET **********************");

  // demande d'envoi
    int maxLoops = 10;
  int currentLoop = 0;
  boolean done = false;
  ESP8266.print("AT+CIPSEND=4,");
  ESP8266.println(cmdGet.length());

  //delay(500);
  done = ESP8266.find(">");
  currentLoop = 0;
  while (!done) {
    delay(500);
    done = ESP8266.find(">");
    if (currentLoop >= maxLoops) {
      //debugPrintln(" Attente dépassée");
      break;
    }
    currentLoop++;
    //debugPrint(".");
  }
    envoieAuESP8266(cmdGet + "\r\n\r\n");
   recoitDuESP8266(8000);
  
//  // send data length
//  cmd = "AT+CIPSEND=";
//  cmd += String(cmdGet.length());
//  ESP8266.println(cmd);
//  
//  if(ESP8266.find(">")){
//    ESP8266.print(cmdGet);
//  }
//  else{
//    ESP8266.println("AT+CIPCLOSE");
//    // alert user
//    Serial.println("AT+CIPCLOSE");
//  }
  
  // thingspeak needs 15 sec delay between updates
  delay(16000);
}


void initESP8266()
{

  debugPrintln("**************** DEBUT DE L'INITIALISATION ***************");

  envoieAuESP8266("AT");
  recoitDuESP8266(1000);

  envoieAuESP8266("AT+CWMODE=3");
  recoitDuESP8266(1000);

  envoieAuESP8266("AT+CWJAP=\"" + NomduReseauWifi + "\",\"" + MotDePasse + "\"");
  recoitDuESP8266(10000);

  envoieAuESP8266("AT+CIFSR");
  recoitDuESP8266(1000);

  envoieAuESP8266("AT+CIPMUX=1");
  recoitDuESP8266(1000);

  envoieAuESP8266("AT+CIPSERVER=1,80");
  recoitDuESP8266(1000);

  debugPrintln("***************** INITIALISATION TERMINEE ****************");

  debugPrintln("");
}
/****************************************************************/
/*        Fonction qui envoie une commande à l'ESP8266          */
/****************************************************************/
void envoieAuESP8266(String commande)
{
  // debugPrintln(commande);
  ESP8266.println(commande);
}
/****************************************************************/
/*Fonction qui lit et affiche les messages envoyés par l'ESP8266*/
/****************************************************************/
void recoitDuESP8266(const int timeout)
{
  String reponse = "";
  long int time = millis();
  while ( (time + timeout) > millis())
  {
    while (ESP8266.available())
    {
      char c = ESP8266.read();
      reponse += c;
    }
  }
  debugPrintln(reponse);
}

void debugPrint(String m) {
#ifdef DEBUG
  Serial.print(m);
#endif

}
void debugPrintln(String m) {
#ifdef DEBUG
  Serial.println(m);
#endif

}