// Implémentation des bibléothèque
#include <Adafruit_SSD1306.h>
#include <WiFi.h>
#include <HTTPClient.h>
#include <Adafruit_GFX.h>
#include "ThingSpeak.h"
#include <DallasTemperature.h>
#include <OneWire.h>

const int myChannelNumber =2783969 ;
const char* myApiKey = "RIAFHNRIONNYSG12";
const char* server = "api.thingspeak.com";
int sensorPin = 15;
const int LED_PIN = 13;
int ConnectedPin = 2;
int oilSensor = 4;
char* state =" ";
int ledRed = 23;
int buzzer = 5;

// Configuration de l'écran OLED
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);

// Configuration WiFi
const char* ssid = "Wokwi-GUEST";
const char* password = "";
OneWire oneWire (sensorPin);  // creates the OneWire object using a specific pin
DallasTemperature sensor (&oneWire); 
WiFiClient client;

void setup() {
  Serial.begin(115200);
  sensor.begin ();
  pinMode(LED_PIN, OUTPUT);
  pinMode(ConnectedPin, OUTPUT);
  pinMode(oilSensor, INPUT);
  pinMode(ledRed, OUTPUT);
  pinMode(buzzer, OUTPUT);

  // Initialisation de l'écran OLED - pin21 : SDA - PIN22 : SCL
  if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println("Erreur : OLED non trouvé !");
    while (true);
  }
  display.clearDisplay();

  // Connexion au WiFi
  display.setCursor(0, 0);
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);
  display.println("Connexion WiFi...");
  display.display();

  display.clearDisplay();
  display.setCursor(0, 0);
  display.println("Connected to wifi jsdjerba !");
  display.display();
  delay(2000);

  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connexion...");
    display.println(".");
    display.display();
  }
  ThingSpeak.begin(client);
}

void alarme()
 {
   tone(buzzer, 262, 2500);
 }


void loop() {
 digitalWrite(ConnectedPin,0); 
 digitalWrite(ledRed,HIGH);
 digitalWrite(ConnectedPin,LOW);

 sensor.requestTemperatures ();
 int temp = sensor.getTempCByIndex (0);

  bool level =digitalRead(oilSensor);
 if (level) {
   state ="Level OK";
   digitalWrite(ledRed,LOW);
  } else {
   state="Low Level";
   digitalWrite(ledRed,HIGH);
  }
  // Affichage des données sur l'OLED
  display.clearDisplay();
  display.setCursor(0, 0);
  display.setTextSize(2);
  display.print("Temp:");
  display.print(temp);
  display.println(" C");
  display.println(" --------");
  display.println("Oil state:");
  display.print(state);
 // display.println("ok");
  display.display();

  // Envoi des données vers ThingSpeak
  ThingSpeak.setField(1,temp);
  ThingSpeak.setField(2,level);
 if (temp>=28){
   alarme();
 }else{
  digitalWrite(5, LOW);
  }
    int x = ThingSpeak.writeFields(myChannelNumber,myApiKey);
    Serial.println("Temp: " + String(temp, 2) + "°C");
    if(x == 200){
    Serial.println("Data pushed successfull");
    digitalWrite(ConnectedPin,HIGH);
  }else{
    Serial.println("Push error" + String(x));
    digitalWrite(ConnectedPin,LOW);
  }
  Serial.println("---");
  delay(10000);
}