#include <ESP32Firebase.h>
#include <DHT.h>
#include <WiFi.h>
#include <ThingSpeak.h>
#include <ESP32Servo.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>

#define REFERENCE_URL "https://test-a25bf-default-rtdb.firebaseio.com/"
#define DHTPIN 13  
#define DHTTYPE DHT22  
//#define Relay 18
#define Gled 16
#define Rled 5
//#define LDR_PIN 0
#define servoPin 4
#define I2C_ADDR 0x27

//const float GAMMA = 0.7;
//const float RL10 = 50;

char ssid[] = "Wokwi-GUEST";   
char pass[] = "";  

unsigned long myChannelNumber = 2549032;
const char * myWriteAPIKey = "ZRX7D59HRL9767W3";

int sv_active=0;

WiFiClient client;
Servo servo;
LiquidCrystal_I2C lcd(I2C_ADDR, 16, 2);
DHT dht(DHTPIN, DHTTYPE);
Firebase firebase(REFERENCE_URL);

void setup() {
  servo.attach(servoPin, 500, 2400);
  Wire.begin(21, 22); 
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0, 0); 
  lcd.print("TRAN HONG PHUC"); 
  lcd.setCursor(0, 1); 
  lcd.print("21142350");
  pinMode(Gled, OUTPUT);
  pinMode(Rled, OUTPUT);
  //pinMode(Relay, OUTPUT);
  digitalWrite(Gled, HIGH);
  digitalWrite(Rled, LOW);
  //digitalWrite(Relay, LOW);
  servo.write(0);
  //pinMode(LDR_PIN, INPUT);
  Serial.begin(9600);
  delay(1000);

}

void loop() 
{
  //Ket noi wifi
  if(WiFi.status() != WL_CONNECTED){
    Serial.print("Attempting to connect to SSID: ");
    Serial.println(ssid);
    while(WiFi.status() != WL_CONNECTED){
      WiFi.begin(ssid, pass);  
      Serial.print(".");
      delay(5000);    
    }
    Serial.println("\nConnected.");
  }

  WiFi.mode(WIFI_STA);  
  ThingSpeak.begin(client);  
  
  //Doc du lieu
  dht.begin();
  float h = dht.readHumidity();
  float t = dht.readTemperature();  
 
  if (isnan(h) || isnan(t)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }

  Serial.print("Nhiet do: ");
  Serial.print(t);
  Serial.print("*C  ");
  Serial.print("Do am: ");
  Serial.print(h);
  Serial.println("%  ");

  //if (digitalRead(LDR_PIN) == LOW)
  //{
  //  Serial.println("Light!");
  //  digitalWrite(Relay, LOW);
  //}
  //else {
  //  Serial.println("Dark!");
  //  digitalWrite(Relay, HIGH);
  //}

  if ((t >30 )||(h>70)) {
    digitalWrite(Rled, HIGH);
    digitalWrite(Gled, LOW);
    servo.write(90);
    sv_active=1;
  }
  else if ((t<25)&&(h<60))
  {
    digitalWrite(Gled, HIGH);
    digitalWrite(Rled, LOW);
    servo.write(0);
    sv_active=0;
  }

  firebase.setFloat("Humidity", h);
  firebase.setFloat("Temperature", t);

  /*if (digitalRead(LDR_PIN) == LOW)
  {
    firebase.setString("Lux", "Light");
    firebase.setString("Relay", "Off");
  }
  else
  {
    firebase.setString("Lux","Dark" );
    firebase.setString("Relay", "On");
  }*/

  if (sv_active) firebase.setInt("Servo Angle",90 );
  else firebase.setInt("Servo Angle",0 );

  ThingSpeak.setField(1, t);
  ThingSpeak.setField(2, h);

  if (sv_active) ThingSpeak.setField(3,90 );
  else ThingSpeak.setField(3,0 );
  /*if (digitalRead(LDR_PIN) == LOW) ThingSpeak.setField(6, 0 );
  else ThingSpeak.setField(6, 1);*/

  int x = ThingSpeak.writeFields(myChannelNumber, myWriteAPIKey);
  if(x == 200){
    Serial.println("Channel update successful.");
  }
  else{
    Serial.println("Problem updating channel. HTTP error code " + String(x));
  }
  Serial.print("Complete Update\n");
  delay(200);
}