#include <SPI.h>
#include <Wire.h>//alows communications with I2C devices
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>//library for Monochrome OLEDs based on SSD1306 drivers
#include "Adafruit_ILI9341.h"


#define TFT_DC 9
#define TFT_CS 10
#define trigPin 7
#define echoPin 6
#define SCREEN_WIDTH 128 // OLED width,  in pixels
#define SCREEN_HEIGHT 64 // OLED height, in pixels
//----------- Temperature -----------------
#include <DHT.h>

// Define the sensor type (DHT22)
#define DHT_TYPE DHT22

// Pin where your DHT11 is connected to
#define DHT_PIN 2

// Initialize the DHT sensor
DHT dht(DHT_PIN, DHT_TYPE);


// create an OLED display object connected to I2C
Adafruit_SSD1306 oled(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);

Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC);


void setup() {
  Serial.begin(9600);// Initialize serial communication
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  // Initialize the DHT sensor
  dht.begin();
  tft.begin();

  // initialize OLED display with I2C address 0x3C
  if (!oled.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("failed to start SSD1306 OLED"));
    while (1);
  }

  delay(500);         // wait two seconds for initializing
  oled.clearDisplay(); // clear display

}

void loop() {


float duration;
float distance_Km;
 
digitalWrite(trigPin, LOW); //PULSE ___|---|___
delayMicroseconds(2);
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);
 
duration = pulseIn(echoPin, HIGH);
 
distance_Km = (duration/2) / 29.2;

  tft.setCursor(0, 0);
  tft.setTextColor(ILI9341_WHITE, ILI9341_BLACK);
  tft.setTextSize(2);
  tft.println("Distanta parcursa");

  tft.setCursor(0, 20);
  tft.setTextColor(ILI9341_GREEN, ILI9341_BLACK);
  tft.setTextSize(2);
  tft.println(distance_Km);

  tft.setCursor(90, 20);
  tft.setTextColor(ILI9341_GREEN, ILI9341_BLACK);
  tft.setTextSize(2);
  tft.println("Km");

  delay(500);

oled.setCursor(0,0); //oled display
oled.setTextSize(1);
oled.setTextColor(WHITE);
oled.println("Distanta parcursa");
 
oled.setCursor(20,10); //oled display
oled.setTextSize(1);
oled.setTextColor(WHITE);
oled.println(distance_Km);

oled.setCursor(60,10);
oled.setTextSize(1);
oled.println("Km");
 
delay(500);

Serial.println(distance_Km);

 float temperature = dht.readTemperature();

  tft.setCursor(0, 60);
  tft.setTextColor(ILI9341_WHITE, ILI9341_BLACK);
  tft.setTextSize(2);
  tft.println("Temp lichid racire");

  tft.setCursor(0, 80);
  tft.setTextColor(ILI9341_GREEN, ILI9341_BLACK);
  tft.setTextSize(2);
  tft.println(temperature);

  tft.setCursor(90, 80);
  tft.setTextColor(ILI9341_GREEN, ILI9341_BLACK);
  tft.setTextSize(2);
  tft.println("C");

  delay(500);

  oled.setTextSize(1);         // set text size
  oled.setTextColor(WHITE);    // set text color

  oled.setCursor(0,30);       // set position to display (x,y)
  oled.print("Temp lichid racire"); // set text

  oled.setCursor(20,40);       // set position to display (x,y)
  oled.print(temperature); // set text

  oled.setCursor(60,40);
  oled.print("C");

  oled.display();              // display on OLED
  

//------Temperature Code Starts Here-----------

// Read temperature and humidity data from the sensor
 // float temperature = dht.readTemperature();
 // float humidity = dht.readHumidity();

  // Check if the data was successfully read from the sensor
  if (!isnan(temperature)) {
    // Print the temperature and humidity values to the serial monitor
    Serial.print("Temp lichid racire (°C): ");
    Serial.println(temperature);
  
  } else {
    // If there was an error reading data from the sensor, print an error message
    Serial.println("Error reading from DHT sensor");
  }

  // Delay for a few seconds before taking the next reading
  delay(500);
  oled.clearDisplay();

}