#define BLYNK_TEMPLATE_ID "TMPL3grG9nPT7"
#define BLYNK_TEMPLATE_NAME "soil moisture and npk"
#define BLYNK_AUTH_TOKEN "gFxZ4mVCpGZFPmfDFYFFeOtDOb9_5hxY"

#include <BlynkSimpleEsp32.h>
#include <Wire.h>
#include <DHT.h>

// Pin definitions
#define DHT_PIN 16
#define BUZZER_PIN 17
#define MOISTURE_PIN A0

#define DHT_TYPE DHT22
DHT dht(DHT_PIN, DHT_TYPE);

// Virtual pin definitions
#define VIRTUAL_PIN_TEMP V3
#define VIRTUAL_PIN_HUMIDITY V4
#define VIRTUAL_PIN_NITROGEN V0
#define VIRTUAL_PIN_PHOSPHOROUS V1
#define VIRTUAL_PIN_POTASSIUM V2

char auth[] = "gFxZ4mVCpGZFPmfDFYFFeOtDOb9_5hxY";
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

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

  Blynk.begin(auth, ssid, pass);

  while (Blynk.connect() == false) {
    Serial.println("Couldn't connect to Blynk.");
  }
}

void loop() {
  Blynk.run();

  byte val1, val2, val3;
  val1 = random(0, 350);
  delay(250);
  val2 = random(0, 350);
  delay(250);
  val3 = random(0, 330);
  delay(250);

  Serial.println();
  Serial.print("Nitrogen: ");
  Serial.print(val1);
  Serial.println(" mg/kg");
  Serial.print("Phosphorous: ");
  Serial.print(val2);
  Serial.println(" mg/kg");
  Serial.print("Potassium: ");
  Serial.print(val3);
  Serial.println(" mg/kg");

  int moistureValue = analogRead(MOISTURE_PIN);
  String moistureLevel;
  if (moistureValue <= 300) {
    moistureLevel = "Low";
  } else {
    moistureLevel = "High";
  }
  Serial.print("Moisture Level: ");
  Serial.println(moistureLevel);

  delay(2000);

  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

  if (temperature > 30.0 || temperature < 0.0) {
    digitalWrite(BUZZER_PIN, HIGH);
    tone(BUZZER_PIN, 1000);
  } else {
    digitalWrite(BUZZER_PIN, LOW);
    noTone(BUZZER_PIN);
  }

  Blynk.virtualWrite(VIRTUAL_PIN_TEMP, temperature);
  Blynk.virtualWrite(VIRTUAL_PIN_HUMIDITY, humidity);
  Blynk.virtualWrite(VIRTUAL_PIN_NITROGEN, val1);
  Blynk.virtualWrite(VIRTUAL_PIN_PHOSPHOROUS, val2);
  Blynk.virtualWrite(VIRTUAL_PIN_POTASSIUM, val3);
}