#define BLYNK_TEMPLATE_ID "TMPL3un_rCSio"
#define BLYNK_TEMPLATE_NAME "Cattle Monitor System"
#define BLYNK_AUTH_TOKEN "QefjfwjIPBwYFe5Jleds2v2RJxUam3uT"

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

#define DHTPIN 4
#define DHTTYPE DHT22
#define BUZZER_PIN 2

DHT_Unified dht(DHTPIN, DHTTYPE);
uint32_t delayMS;

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

void connectToWiFi() {
  WiFi.begin(ssid, pass);
    Serial.print("Connecting to WiFi");
      while (WiFi.status() != WL_CONNECTED) {
          delay(500);
              Serial.print(".");
                }
                  Serial.println(" connected");
                  }

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

                          connectToWiFi();
                            Blynk.begin(auth, ssid, pass);

                              sensor_t sensor;
                                dht.temperature().getSensor(&sensor);
                                  Serial.println(F("------------------------------------"));
                                    Serial.println(F("Temperature Sensor"));
                                      Serial.print(F("Sensor Type: ")); Serial.println(sensor.name);
                                        Serial.print(F("Driver Ver:  ")); Serial.println(sensor.version);
                                          Serial.print(F("Unique ID:   ")); Serial.println(sensor.sensor_id);
                                            Serial.print(F("Max Value:   ")); Serial.print(sensor.max_value); Serial.println(F("°C"));
                                              Serial.print(F("Min Value:   ")); Serial.print(sensor.min_value); Serial.println(F("°C"));
                                                Serial.print(F("Resolution:  ")); Serial.print(sensor.resolution); Serial.println(F("°C"));
                                                  Serial.println(F("------------------------------------"));
                                                    dht.humidity().getSensor(&sensor);
                                                      Serial.println(F("Humidity Sensor"));
                                                        Serial.print(F("Sensor Type: ")); Serial.println(sensor.name);
                                                          Serial.print(F("Driver Ver:  ")); Serial.println(sensor.version);
                                                            Serial.print(F("Unique ID:   ")); Serial.println(sensor.sensor_id);
                                                              Serial.print(F("Max Value:   ")); Serial.print(sensor.max_value); Serial.println(F("%"));
                                                                Serial.print(F("Min Value:   ")); Serial.print(sensor.min_value); Serial.println(F("%"));
                                                                  Serial.print(F("Resolution:  ")); Serial.print(sensor.resolution); Serial.println(F("%"));
                                                                    Serial.println(F("------------------------------------"));
                                                                      
                                                                        delayMS = sensor.min_delay / 1000;
                                                                        }

                                                                        void loop() {
                                                                          Blynk.run();
                                                                            
                                                                              // Delay between measurements
                                                                                delay(delayMS);

                                                                                  // Get temperature event and print its value
                                                                                    sensors_event_t event;
                                                                                      dht.temperature().getEvent(&event);
                                                                                        if (isnan(event.temperature)) {
                                                                                            Serial.println(F("Error reading temperature!"));
                                                                                              } else {
                                                                                                  Serial.print(F("Temperature: "));
                                                                                                      Serial.print(event.temperature);
                                                                                                          Serial.println(F(" °C"));
                                                                                                              Blynk.virtualWrite(V1, event.temperature);
                                                                                                                  
                                                                                                                      if (event.temperature > 38) {
                                                                                                                            digitalWrite(BUZZER_PIN, HIGH);
                                                                                                                                  Blynk.virtualWrite(V0, 255); // Turn on LED on Blynk
                                                                                                                                        Serial.println(F("Buzzer ON"));
                                                                                                                                            } else {
                                                                                                                                                  digitalWrite(BUZZER_PIN, LOW);
                                                                                                                                                        Blynk.virtualWrite(V0, 0); // Turn off LED on Blynk
                                                                                                                                                              Serial.println(F("Buzzer OFF"));
                                                                                                                                                                  }
                                                                                                                                                                    }

                                                                                                                                                                      // Get humidity event and print its value
                                                                                                                                                                        dht.humidity().getEvent(&event);
                                                                                                                                                                          if (isnan(event.relative_humidity)) {
                                                                                                                                                                              Serial.println(F("Error reading humidity!"));
                                                                                                                                                                                } else {
                                                                                                                                                                                    Serial.print(F("Humidity: "));
                                                                                                                                                                                        Serial.print(event.relative_humidity);
                                                                                                                                                                                            Serial.println(F("%"));
                                                                                                                                                                                                Blynk.virtualWrite(V2, event.relative_humidity);
                                                                                                                                                                                                  }
                                                                                                                                                                                                  }