/*
 * code for LAB_1
 * 24/11/2023
 * by Farhan
 * 21DDT22F1235
 */

//libarys
#include <WiFi.h>
#include <NTPClient.h>
#include <WiFiUdp.h>
#include <LiquidCrystal_I2C.h>
#include "DHT.h"

//setting for dht 22 pin
#define DHTPIN 26     
#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321
DHT dht(DHTPIN, DHTTYPE);

//setting lcd i2c 16*22
LiquidCrystal_I2C lcd(0x27, 16, 2);

//ntp setting
WiFiUDP ntpUDP;
NTPClient timeClient(ntpUDP, "asia.pool.ntp.org", 28800, 60000);

//wifi setting wokwi only for real device please change your ssid and password
WiFiClient  client;
const char *ssid     = "Wokwi-GUEST";
const char *password = "";

const int led_red = 17;
const int led_yellow = 16;
const int led_green = 4;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  //serial monitor enable

  //lcd test
//
lcd.init();
  lcd.backlight();
  lcd.setCursor(0,0);
  lcd.print("lab 1 v1");
  lcd.setCursor(0,1);
  lcd.print("By Nasr_2023");
  delay(1000);
  //lcd.clear();
 
 //connecting to ssid notification  
   WiFi.disconnect();
   WiFi.begin(ssid, password);
   Serial.println();
   Serial.println();
   Serial.print("Connecting to ");
   Serial.println(ssid);
   WiFi.begin(ssid, password);


//check wifi status 
   while (WiFi.status() != WL_CONNECTED) {
    delay(550);
    Serial.print(".");
  }
  Serial.println("");
  Serial.print(" connected to wifi...");
  Serial.println(ssid);
  Serial.println();

  //PIN LED AS output
  pinMode(led_red, OUTPUT); // initialize digital ledPin as an output.
  pinMode(led_green, OUTPUT); // initialize digital ledPin as an output.
  pinMode(led_yellow, OUTPUT); // initialize digital ledPin as an output.
}

void loop() {

//read sensor and display on lcd time with tem& humi
 int temperature = dht.readTemperature();
 int humidity = dht.readHumidity();
 //enable ntp
  timeClient.update();
  Serial.println(timeClient.getFormattedTime());
  //delay(1000);
  lcd.setCursor(0,0);
  lcd.print("    ");
  lcd.print(timeClient.getFormattedTime());
  // Check if any reads failed and exit early (to try again).
  if (isnan(temperature) || isnan(humidity)) {
    Serial.println(F("Failed to read from DHT sensor!"));
    return;
  }
  lcd.setCursor(0,1);
  lcd.print(F("Hum:"));
  lcd.print(humidity);
  lcd.print(F("% Temp:"));
  lcd.print(temperature);
  lcd.print((char)223);
  lcd.print(F("C"));

  // Wait a few seconds between measurements.
 delay(1);

if(temperature>26){
  digitalWrite(led_yellow,HIGH); // sets the digital pin 13 on
}
if(temperature<=26){
  digitalWrite(led_yellow,LOW); // sets the digital pin 13 on  
}

if(humidity>43){
  digitalWrite(led_green,HIGH); // sets the digital pin 13 on
}
if(humidity<=42){
  digitalWrite(led_green,LOW); // sets the digital pin 13 on  
}

//led red timing on
int seconds= 30;


//timeClient.getSeconds()
if(seconds>timeClient.getSeconds()){
digitalWrite(led_red,HIGH); //
}
if(seconds<timeClient.getSeconds()){
digitalWrite(led_red,LOW); //
}
}