#include <DHT.h>
#include <LiquidCrystal_I2C.h>
#include <Keypad.h>
#include <Wire.h>
int dhtPin =13;
#define DHTTYPE DHT22
LiquidCrystal_I2C lcd(0x27,16,2);
DHT dht(dhtPin,DHTTYPE);
int motorPin=12;
int R=0;
int L=0;
int ledPin =3;
const byte ROWS = 4;
const byte COLS = 4;
char keys[ROWS][COLS] = {
  {'1', '2', '3', 'A'},
  {'4', '5', '6', 'B'},
  {'7', '8', '9', 'C'},
  {'*', '0', '#', 'D'}
};
byte rowPins[ROWS] = {11, 10, 9, 8};
byte colPins[COLS] = {7, 6, 5, 4};
Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);

void setup() {
  // put your setup code here, to run once:
  dht.begin();
  pinMode(motorPin,OUTPUT);
  pinMode(ledPin, OUTPUT);
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0,0);
  lcd.print ("welcom to my project");
  lcd.clear();
  lcd.print("enter temperatur:");
  
  // get the first number from the keypad
  lcd.setCursor(0,1);
  char key = keypad.waitForKey();
  while (key != '#') {
    if (key >= '0' && key <= '9') {
      R = R * 10 + (key - '0');
      
      lcd.print(key);
    }
    key = keypad.waitForKey();
  }
  lcd.clear();
  lcd.print("enter huméditie :");
  
  // get the first number from the keypad
  lcd.setCursor(0,1);
  key = keypad.waitForKey();
  while (key != '#') {
    if (key >= '0' && key <= '9') {
      L = L * 10 + (key - '0');
      
      lcd.print(key);
    }
    key = keypad.waitForKey();
  }

 while(R>80 or R<-20){
  lcd.clear();
  lcd.setCursor(3,1);
  lcd.print("erreur !!!");
  delay(1000);
  Write_again();
  break;
 }
  while(R>100 or R<0){
  lcd.clear();
  lcd.setCursor(3,1);
  lcd.print("erreur !!!");
  delay(1000);
  Write_again();
  break;
 }
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("h%:");
  lcd.setCursor(0,1);
  lcd.print("T C:");
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(motorPin, LOW);
  digitalWrite(ledPin, LOW);
  float T =dht.readTemperature();
  float H =dht.readHumidity();
  lcd.setCursor(4,0);
  lcd.print(H);
  lcd.setCursor(7,1);
  lcd.print(T);
  if (R<T  or  H<L){
    digitalWrite(motorPin, HIGH);
    digitalWrite(ledPin, HIGH);
  }else{
    digitalWrite(motorPin, LOW);
    digitalWrite(ledPin, LOW);
  }
}
void  Write_again(){
  lcd.clear();
  lcd.print("enter temperatur:");
  
  // get the first number from the keypad
  lcd.setCursor(0,1);
  char key = keypad.waitForKey();
  while (key != '#') {
    if (key >= '0' && key <= '9') {
      R = R * 10 + (key - '0');
      
      lcd.print(key);
    }
    key = keypad.waitForKey();
  }
  lcd.clear();
  lcd.print("enter huméditie :");
  
  // get the first number from the keypad
  lcd.setCursor(0,1);
  key = keypad.waitForKey();
  while (key != '#') {
    if (key >= '0' && key <= '9') {
      L = L * 10 + (key - '0');
      
      lcd.print(key);
    }
    key = keypad.waitForKey();
  }
}