#define BLYNK_TEMPLATE_ID"TMPL63IzUBq2y"
#define BLYNK_TEMPLATE_NAME"QuickstartTemplate"
#define BLYNK_AUTH_TOKEN "your_auth_token_here" 
#define BLYNK_PRINT Serial

#include <WiFi.h> 
#include<WiFiClient.h>
#include<BlynkSimpleEsp32.h> 
#include <DHT.h>
#include <LiquidCrystal.h>
char auth[]="your_auth_token_here"; 
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

#define DHTPIN 4 
#define DHTTYPE DHT22
DHT dht(DHTPIN,DHTTYPE);

const int rs=21,en=22,d4=23,d5=19,d6=18,d7=5; 
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

const int moistureSensorPin=32; 
const int phSensorPin = 33;
const int npkSensorPin=34;
 
BlynkTimer timer;  
void setup() {
Serial.begin(115200); 
Serial.println("Initializing...");

dht.begin();

lcd.begin(16, 2);  
lcd.print("Initializing...");

delay(2000); 
Blynk.begin(auth,ssid,pass);
timer.setInterval(2000L,sendSensorData);
}

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

void sendSensorData(){

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

if (isnan(temperature) || isnan(humidity)) {
Serial.println("FailedtoreadfromDHTsensor!");
lcd.setCursor(0, 0);
lcd.print("DHT Read Error!"); 
Blynk.virtualWrite(V1, "Error"); 
Blynk.virtualWrite(V2, "Error"); 
return;
}
 
int soilMoistureValue=analogRead(moistureSensorPin); 
int soilPHValue = analogRead(phSensorPin);
int soilNPKValue=analogRead(npkSensorPin);

Serial.print("Temperature: ");
 Serial.print(temperature); 
 Serial.print("C, Humidity: "); 
 Serial.print(humidity); 
 Serial.println("%"); 
 Serial.print("Soil Moisture: ");
  Serial.println(soilMoistureValue); 
  Serial.print("Soil pH: "); 
  Serial.println(soilPHValue);
   Serial.print("Soil NPK: "); 
   Serial.println(soilNPKValue);

Blynk.virtualWrite(V1, temperature);
 Blynk.virtualWrite(V2, humidity); 
 Blynk.virtualWrite(V3, soilMoistureValue);
  Blynk.virtualWrite(V4, soilPHValue);
   Blynk.virtualWrite(V5, soilNPKValue);

lcd.clear(); 
lcd.setCursor(0, 0); 
lcd.print("Temp: "); 
lcd.print(temperature); 
lcd.print("C Hum: "); 
lcd.print(humidity);
lcd.setCursor(0, 1); 
lcd.print("Moist: ");
lcd.print(soilMoistureValue); 
lcd.print("%");
}