#define BLYNK_TEMPLATE_ID "TMPL6ErGtoExP"
#define BLYNK_TEMPLATE_NAME "DHT Control"
#define BLYNK_AUTH_TOKEN "vBtvwuqNQ_I_rJeDXt6NNjSoW77fCADv"

#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include <DHT.h>

#define DHTPIN 15
#define DHTTYPE DHT22

DHT dht(DHTPIN, DHTTYPE);

const int pins[] = {2, 4, 5, 16, 17, 18, 19, 21, 22, 23};

char ssid[] = "Wokwi-GUEST";
char pass[] = "";

BlynkTimer timer;

void setup() {
  Serial.begin(115200);
  dht.begin();

  for (int i = 0; i < 10; i++) {
    pinMode(pins[i], OUTPUT);
  }

  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);

  timer.setInterval(2000L, sendSensorData);
}

void displayBarGraph(int value, int max_value) {
  int numBars = map(value, 0, max_value, 0, 10);
  for (int i = 0; i < 10; i++) {
    digitalWrite(pins[i], (i < numBars) ? HIGH : LOW);
  }
}

void sendSensorData() {
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

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

  Serial.print(F("Temperature: "));
  Serial.print(temperature);
  Serial.println(F("°C"));
  
  Serial.print(F("Humidity: "));
  Serial.print(humidity);
  Serial.println(F("%"));

  displayBarGraph(temperature, 80);

  Blynk.virtualWrite(V0, temperature);
  Blynk.virtualWrite(V1, humidity);
}

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