/*
  ESP32 + ILI9341 LCD Basic Example

  https://wokwi.com/projects/325324981270479442
*/

#include <WiFi.h>
#include <ThingSpeak.h>


#include "SPI.h"
#include "Adafruit_GFX.h"
#include "Adafruit_ILI9341.h"


#include "DHTesp.h"

char ssid[] = "Wokwi-GUEST";   // your network SSID (name) 
char pass[] = "";   // your network password           
WiFiClient  client;
unsigned long myChannelNumber = 2153855;
const char * myWriteAPIKey = "1LVM9IPG37Q9NVFW";

const int DHT_PIN = 33;
const int DELAY_UPDATE = 1000;

uint32_t timerUpdate = 0;

DHTesp dhtSensor;

#define TFT_DC 2
#define TFT_CS 15
Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC);
#define gas_pin 36
void setup() {
  Serial.begin(115200);
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
  tft.begin();

  tft.setCursor(20, 120);
  tft.setTextColor(ILI9341_RED);
  tft.setTextSize(3);
  pinMode(gas_pin, INPUT);
  ThingSpeak.begin(client);
  tft.println("Home Automation ");
  tft.setCursor(80, 160);

}
float t, h;
void loop() { 

  if(WiFi.status() != WL_CONNECTED)
  {
    Serial.print("Attempting to connect to SSID: ");
    while(WiFi.status() != WL_CONNECTED)
    {
      WiFi.begin(ssid, pass); // Connect to WPA/WPA2 network. Change this  line if using open or WEP network
      Serial.print(".");
      delay(5000);     
    } 
    Serial.println("\nConnected.");
  }
  
  int gas_value=analogRead(gas_pin);
  if (gas_value<700)
  {
    tft.setCursor(20, 120);
    tft.setTextColor(ILI9341_RED);
    tft.setTextSize(3);
    tft.println("Alert");
    delay(6000);
  }

  if (millis() - timerUpdate >= DELAY_UPDATE) {
    timerUpdate = millis();
    TempAndHumidity  data = dhtSensor.getTempAndHumidity();
    //Serial.println("\x1b[2J\x1b[;H");
    t = data.temperature;
    h = data.humidity;
    Serial.printf(" Temperature: %.2f %s", t, "°C");
    Serial.printf(" Humidity: %.1f %s", h, "%\n");
  }

ThingSpeak.setField(1, t);
ThingSpeak.setField(2, h);
ThingSpeak.setField(3, gas_value);
int x=ThingSpeak.writeFields(myChannelNumber, myWriteAPIKey);

 
  if(x==200){
    Serial.println("Data is successfully uploaded");
  }
  else{
     Serial.println("Data is NOT successfully uploaded");
  }


  tft.setCursor(10, 160);
  tft.setTextColor(ILI9341_GREEN);
  tft.setTextSize(2);
  tft.println("Temp: ");
  tft.setCursor(80, 160);
  //tft.setTextColor(ILI9341_BLACK);
  tft.println(t);
 
  tft.setCursor(10, 240); 
  tft.println("Hum: ");
  tft.setTextColor(ILI9341_GREEN);
  tft.setCursor(80, 240); 
  tft.println(h);



  delay(500); 
  tft.fillScreen(0x0000); 

  }