#define BLYNK_TEMPLATE_ID "TMPL3kro0tic-"
#define BLYNK_TEMPLATE_NAME "cattle project"
#define BLYNK_AUTH_TOKEN "dPbE63msetqZ8ODxHKg9rVWlZte3yYM4"
#define BLYNK_PRINT Serial

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

#define DHTTYPE DHT22
#define DHTPIN 17

byte led = 4;
byte led2 = 27;
byte led3 = 26; // LED for humidity alert
int buzzer = 18;

char ssid[] = "Wokwi-GUEST";
char pass[] = "";
char auth[] = "dPbE63msetqZ8ODxHKg9rVWlZte3yYM4";

const float potPin = 34;
float potValue = 0;
DHT dht(DHTPIN, DHTTYPE, 22);
BlynkTimer timer;

void setup() {
  Serial.begin(115200);
  Blynk.begin(auth, ssid, pass);
  dht.begin();
  timer.setInterval(2000L, sendData);
  pinMode(led, OUTPUT);
  digitalWrite(led, LOW);
  pinMode(led2, OUTPUT);
  digitalWrite(led2, LOW);
  pinMode(led3, OUTPUT);
  digitalWrite(led3, LOW);
  pinMode(buzzer, OUTPUT);
  Serial.println("reading data from the cattle!");
}

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

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

  Serial.println("oxygen: " + String(potValue));
  Serial.println("humidity: " + String(h));
  Serial.println("temperature: " + String(t));
  Blynk.virtualWrite(V2, potValue);
  Blynk.virtualWrite(V1, h);
  Blynk.virtualWrite(V0, t);

  if (t > 38 || t < 35) {
    Serial.println("health issues detected! Treat your cattle quickly.");
    Blynk.virtualWrite(V3, HIGH);
    digitalWrite(led, HIGH);
    tone(buzzer, 200);
    delay(1000L);
  } else {
    Blynk.virtualWrite(V3, LOW);
    digitalWrite(led, LOW);
    tone(buzzer, 0);
  }

  if (potValue < 50) {
    Serial.println("your cattle oxygen level is too low");
    Blynk.virtualWrite(V4, HIGH);
    digitalWrite(led2, HIGH);
    tone(buzzer, 200);
    delay(1000L);
  } else {
    Blynk.virtualWrite(V4, LOW);
    digitalWrite(led2, LOW);
    tone(buzzer, 0);
  }

  if (h < 30 || h > 70) { // Example thresholds for low or high humidity
    Serial.println("humidity is out of the safe range!");
    Blynk.virtualWrite(V5, HIGH);
    digitalWrite(led3, HIGH);
    tone(buzzer, 200);
    delay(1000L);
  } else {
    Blynk.virtualWrite(V5, LOW);
    digitalWrite(led3, LOW);
    tone(buzzer, 0);
  }
}

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