/*********
  Rui Santos
  Complete project details at https://randomnerdtutorials.com  
*********/

#include <LiquidCrystal_I2C.h>
#include "DHT.h"
#include <WiFi.h>
#include "ThingSpeak.h"
// set the LCD number of columns and rows
int lcdColumns = 20;
int lcdRows = 4;

const char * ssid = "Samiullah";
const char * password = "suotal1142";

WiFiClient  client;

unsigned long myChannelNumber = 1933108;
const char * myWriteAPIKey = "PDGLGF3W0NW5O3JQ";

// Timer variables
unsigned long lastTime = 0;
unsigned long timerDelay = 30000;

// set LCD address, number of columns and rows
// if you don't know your display address, run an I2C scanner sketch
LiquidCrystal_I2C lcd(0x27, lcdColumns, lcdRows);  

#define DHTPIN 2     // Digital pin connected to the DHT sensor
// Feather HUZZAH ESP8266 note: use pins 3, 4, 5, 12, 13 or 14 --
// Pin 15 can work but DHT must be disconnected during program upload.
//#define DHTTYPE DHT11   // DHT 11
#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321
#define ldrPin A0 // phototrans pin connected to A1


DHT dht(DHTPIN, DHTTYPE);


int led = 13;                // the pin that the LED is atteched to
int sensor = 5;              // the pin that the sensor is atteched to
int state = LOW;             // by default, no motion detected
int val = 0;
int threshold = 100;  // LDR threshold value 
float temp;
float hum;
float ambi_temp = 30;
float lightValue = 0.0; // Store the ldr analog value
int ldrActuator = 36;


void setup(){


  Serial.begin(115200);

  WiFi.mode(WIFI_STA);   
  
  ThingSpeak.begin(client);  // Initialize ThingSpeak
  
  pinMode(led, OUTPUT);      // initalize LED as an output
  pinMode(sensor, INPUT);    // initialize sensor as an input
  pinMode(ldrPin, INPUT);
  analogReadResolution(10);
  dht.begin();
  lcd.begin(16,2);
  // initialize LCD
  lcd.init();
  // turn on LCD backlight                      
  lcd.backlight();
}

void loop(){
lcd.setCursor(0, 0);
  Temp_sensor();
  Motion_sensor();
  Ldr_sensor();
  // set cursor to first column, first row
  
  // print message
  
  delay(1000);
  // clears the display to print new message
  //lcd.clear();
  // set cursor to first column, second row
  
  if ((millis() - lastTime) > timerDelay) {
    
    // Connect or reconnect to WiFi
    if(WiFi.status() != WL_CONNECTED){
      Serial.print("Attempting to connect");
      while(WiFi.status() != WL_CONNECTED){
        WiFi.begin(ssid, password); 
        delay(5000);     
      } 
      Serial.println("\nConnected.");
    }

    // Get a new temperature reading
//    temperatureC = bme.readTemperature();
     temperatureC = 35;
    Serial.print("Temperature (ºC): ");
    Serial.println(temperatureC);
    
    //uncomment if you want to get temperature in Fahrenheit
    /*temperatureF = 1.8 * bme.readTemperature() + 32;
    Serial.print("Temperature (ºC): ");
    Serial.println(temperatureF);*/
    
    
    // Write to ThingSpeak. There are up to 8 fields in a channel, allowing you to store up to 8 different
    // pieces of information in a channel.  Here, we write to field 1.
    int x = ThingSpeak.writeField(myChannelNumber, 1, temperatureC, myWriteAPIKey);
    //uncomment if you want to get temperature in Fahrenheit
    //int x = ThingSpeak.writeField(myChannelNumber, 1, temperatureF, myWriteAPIKey);

    if(x == 200){
      Serial.println("Channel update successful.");
    }
    else{
      Serial.println("Problem updating channel. HTTP error code " + String(x));
    }
    lastTime = millis();
  }

 
//  delay(1000);
  //lcd.clear(); 
}
void Temp_sensor(void){
  // Reading temperature or humidity takes about 250 milliseconds!
  // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
  hum = dht.readHumidity();
  Serial.print("humidity : ");
  Serial.println(hum);
  // Read temperature as Celsius (the default)
  temp = dht.readTemperature();
Serial.print("Temperature : ");
  Serial.println(temp);
  lcd.print("temp:");
  lcd.print(temp);
  lcd.print("hum:");
  lcd.print(hum);
  // Read temperature as Fahrenheit (isFahrenheit = true)
if (temp > ambi_temp){
   // turn on the fan
 }
 else{

 //turn off the fan
 }

  
}

void Motion_sensor(void){
lcd.setCursor(0,1);
val = digitalRead(sensor);   // read sensor value
Serial.print("Motion Sensor : ");
Serial.println(val);
  if (val == HIGH) {           // check if the sensor is HIGH
    digitalWrite(led, HIGH);   // turn LED ON
    delay(500);                // delay 100 milliseconds 
    
    if (state == LOW) {

      lcd.print("Motion detected!");
      Serial.println("Motion detected!"); 
      state = HIGH;       // update variable state to HIGH
    }
  } 
  else {
      digitalWrite(led, LOW); // turn LED OFF
      delay(500);             // delay 200 milliseconds 
      
      if (state == HIGH){
        lcd.print("Motion stopped!");
        Serial.println("Motion stopped!");
        state = LOW;       // update variable state to LOW
    }
  }
}
void Ldr_sensor(void){
int LDR_Reading = analogRead(ldrPin);
Serial.println(LDR_Reading);
float LDR_Voltage = ((float)LDR_Reading*3.3/1023);
Serial.println(LDR_Voltage);  
if(LDR_Reading<threshold){
    digitalWrite(18, HIGH);}
else
    digitalWrite(18, LOW);}