/*
  Simple "Hello World" for ILI9341 LCD

  https://wokwi.com/arduino/projects/308024602434470466
*/

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

#define TFT_DC 9
#define TFT_CS 10
Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC);

#define DHTPIN 2  
#define DHTTYPE DHT22 
DHT dht(DHTPIN, DHTTYPE);
 
#define BLACK   0x0000
#define BLUE    0x001F
#define RED     0xF800
#define GREEN   0x07E0
#define CYAN    0x07FF
#define MAGENTA 0xF81F
#define YELLOW  0xFFE0
#define WHITE   0xFFFF
float temp =0;
float hum =0;
float pretemp =0;
float prehum =0;
float currtemp =50;
float currhum =100;
float i=0;
float j=0;
int lembap = 100;

void setup(void)
{
    Serial.begin(115200);
    dht.begin();
    tft.begin();
    tft.setRotation(1);            //PORTRAIT
    tft.fillScreen(BLACK);
    tft.setTextColor(YELLOW);
    tft.setTextSize(2);
    tft.fillScreen(BLACK);
    tft.setTextColor(WHITE);
    tft.setCursor(0, 130);
    tft.print("0");
    tft.setTextColor(MAGENTA);
    tft.setCursor(20, 70);
    tft.print("Humidity");
    tft.setTextColor(GREEN);
    tft.setCursor(215, 180);
    tft.print("0");
    tft.setCursor(237, 180);
    tft.print("50");
    tft.setCursor(215, 100);
    tft.print("TEMP");
    tft.setCursor(30, 5);
    tft.setCursor(0, 0);
    tft.setTextColor(YELLOW);
    tft.print("Temperature & Humidity");
    tft.setCursor(120, 25);
    tft.print("Monitor");
    tft.setTextColor(WHITE,BLACK);
}

void loop(void)
{
  tft.fillRect(0, 100, 130, 20,RED);
  tft.setTextSize(2);
  tft.setCursor(90, 130);
  tft.print(lembap + String(" %"));
  tft.setTextSize(3);
  tft.setCursor(198, 130);
  tft.print(temp);


    i=map(pretemp,0,50,0,300);
    j=map(currtemp,0,50,0,300);   
  for (i; i<=j; i=i+0.1)
    {
    float j=i-150 ;
    float angle = (j / 57.2958)  - 1.57; 
    float x1= 80 + cos(angle) * 55;
    float y1 = 130+sin(angle) * 55;
    float x2= 80 + cos(angle) * 75;
    float y2 = 130+sin(angle) * 75;
    tft.drawLine(x1+160, y1,x2+160,y2, GREEN);
    }
   for (i-2; i>=j; i=i-0.05)
    {
    float j=i-150 ;
    float angle = (j / 57.2958)  - 1.57; 
    float x1= 80 + cos(angle) * 57;
    float y1 = 130+sin(angle) * 57;
    float x2= 80 + cos(angle) * 73;
    float y2 = 130+sin(angle) * 73;
    tft.drawLine(x1+160, y1,x2+160,y2, BLACK);
    }
    
  pretemp=currtemp;
  prehum=currhum;
  hum = dht.readHumidity();
  temp = dht.readTemperature();


 if (isnan(hum) || isnan(temp)) 
 {
    Serial.println(F("Failed to read from DHT sensor!. Some random numbers displaying in Reading"));
    temp =random(0,50);
    hum =random(0,100);
   return;
 }
  Serial.println("TEMP: "+String(temp));    
  Serial.println("Hum: "+String(hum)+String("\n"));    
currtemp=temp;
currhum=hum;
lembap=currhum;
tft.fillRect(90, 130, 70, 20, BLACK);
delay(1000);
}