#include <WiFi.h>
#include <WiFiClient.h>
#include <DHT.h>


#define WIFI_SSID "Wokwi-GUEST"
#define WIFI_PASSWORD ""

// BLYNK ---
#define BLYNK_FIRMWARE_VERSION "0.1.0"
#define BLYNK_PRINT Serial
#define BLYNK_TEMPLATE_ID "TMPL6RdFFtTmM"
#define BLYNK_TEMPLATE_NAME "Hoang Hao"
#define BLYNK_AUTH_TOKEN "xHlLoFqGwTT-LD7dXN80vS0G-1Buoc5M"
#include <BlynkSimpleEsp32.h>
BlynkTimer timer;

// DHT22 ---
#define DHTPIN 15
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

// LED ---
#define LED 5
WidgetLED LED_CONNECT(V5);

void setup() {
    Serial.begin(115200);
    pinMode(LED, OUTPUT);

    // Blynk setup
    Blynk.begin(BLYNK_AUTH_TOKEN, WIFI_SSID, WIFI_PASSWORD);

    // DHT sensor setup
    dht.begin();

    // Setup a timer to send data every 2 seconds
    timer.setInterval(2000L, sendData);
}

void loop() {
    Blynk.run();
    timer.run();
}

BLYNK_CONNECTED() {
    Blynk.syncVirtual(V0); // Sync the LED control status on V0 when connected
}

BLYNK_WRITE(V0) {
    int value = param.asInt();  // Read value from virtual pin V0
    if (value) {
        digitalWrite(LED, HIGH); // Turn on LED
    } else {
        digitalWrite(LED, LOW);  // Turn off LED
    }
}

void sendData() {
    float h = dht.readHumidity();
    float t = dht.readTemperature();

    if (isnan(h) || isnan(t)) {
        Serial.println("Failed to read from DHT sensor!");
        return;
    }

    // Send data to Blynk
    Blynk.virtualWrite(V1, t); // Send temperature to Virtual Pin V1
    Blynk.virtualWrite(V2, h); // Send humidity to Virtual Pin V2

    Serial.print("Temperature: ");
    Serial.print(t);
    Serial.print("°C, Humidity: ");
    Serial.print(h);
    Serial.println("%");

    // Update LED widget to show WiFi connection status
    if (WiFi.status() == WL_CONNECTED) {
        LED_CONNECT.on();
    } else {
        LED_CONNECT.off();
    }
}