#include <SPI.h>

#include <DHT.h>

#include <Adafruit_GFX.h>

#include <Adafruit_ILI9341.h>

#include <BlynkSimpleArduino_UNOWiFiR4.h>

 

#define DHTPIN 2

#define DHTTYPE DHT22

DHT dht(DHTPIN, DHTTYPE);

 

Adafruit_ILI9341 tft(10, 9); // CS, DC pins

BlynkTimer timer;

 

void updateBlynk() {

  float h = dht.readHumidity();

  float t = dht.readTemperature();

  

  // Send data to Blynk

  Blynk.virtualWrite(V0, t);

  Blynk.virtualWrite(V1, h);

  

  // Update display

  tft.setCursor(0, 0);

  tft.printf("Temp: %.1fC\nHumidity: %.1f%%", t, h);

}

 

BLYNK_WRITE(V2) { // Blynk app button controls relay

  int state = param.asInt();

  digitalWrite(RELAY_PIN, state); 

}

 

void setup() {

  Serial.begin(115200);

  dht.begin();

  tft.begin();

  tft.fillScreen(ILI9341_BLACK);

  

  Blynk.begin(BLYNK_AUTH_TOKEN, "WiFi_SSID", "WiFi_PASS");

  timer.setInterval(2000L, updateBlynk);

}

 

void loop() {

  Blynk.run();

  timer.run();

}