#include <Adafruit_GFX.h>
#include <Adafruit_ILI9341.h>
#include <DHT.h>

// Define pins for each DHT sensor
#define DHTPIN1 0    // Digital pin connected to the first DHT sensor
#define DHTPIN2 5    // Digital pin connected to the second DHT sensor
#define DHTPIN3 17   // Digital pin connected to the third DHT sensor

// Define DHT sensor types
#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321

// Initialize DHT sensors
DHT dht1(DHTPIN1, DHTTYPE);
DHT dht2(DHTPIN2, DHTTYPE);
DHT dht3(DHTPIN3, DHTTYPE);

// Define ILI9341 display pins
#define TFT_CS    15
#define TFT_RST   4
#define TFT_DC    2

// Initialize ILI9341 display
Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_RST);

void setup() {
  Serial.begin(9600);
  Serial.println(F("DHTxx multiple sensors with ILI9341 display test!"));

  // Initialize DHT sensors
  dht1.begin();
  dht2.begin();
  dht3.begin();

  // Initialize the display
  tft.begin();
  tft.setRotation(1);
  tft.fillScreen(ILI9341_BLACK);
  tft.setTextSize(2);
  tft.setTextColor(ILI9341_WHITE);
  tft.setCursor(0, 0);
  tft.println(F("DHTxx Sensor Readings:"));
}

void loop() {
  delay(2000);

  // Clear the previous readings
  tft.fillRect(0, 30, 320, 210, ILI9341_BLACK);

  // Read and display data from the first DHT sensor
  readAndDisplayDHTData(dht1, 1, 30);

  // Read and display data from the second DHT sensor
  readAndDisplayDHTData(dht2, 2, 80);

  // Read and display data from the third DHT sensor
  readAndDisplayDHTData(dht3, 3, 130);
}

void readAndDisplayDHTData(DHT& dht, int sensorNumber, int yPos) {
  float t = dht.readTemperature();

  if (isnan(t)) {
    Serial.print(F("Failed to read from DHT sensor "));
    Serial.print(sensorNumber);
    Serial.println(F("!"));
    tft.setCursor(0, yPos);
    tft.print(F("Sensor "));
    tft.print(sensorNumber);
    tft.println(F(": Error"));
    return;
  }

  Serial.print(F("Sensor "));
  Serial.print(sensorNumber);
  Serial.print(F(" - Temperature: "));
  Serial.print(t);
  Serial.println(F("°C"));

  tft.setCursor(0, yPos);
  tft.print(F("Sensor "));
  tft.print(sensorNumber);
  tft.print(F(": "));
  tft.print(t);
  tft.println(F("C"));
}