#define BLYNK_TEMPLATE_ID "TMPL3bmDyc_Ph"
#define BLYNK_TEMPLATE_NAME "soil nutrition monitoring system"
#define BLYNK_AUTH_TOKEN "N1h31b1RTYHoD3rfUpc1x56B3Eg4TiBL"
#define BLYNK_PRINT Serial


#include <DHTesp.h>
#include <WiFi.h>
#include <BlynkSimpleEsp32.h>




char auth[] = BLYNK_AUTH_TOKEN;
char ssid[] = "Wokwi-GUEST";
char pass[] = "";
int dhtPin = 13;
int nitro = 34;
int phos = 35;
int potas = 32;

struct previousValues{
  int temperature ;
  int humidity ;
  int nitro;
  int phos ;
  int potas ;
};


previousValues potValues = {0,0,0,0,0};
DHTesp dht;


BLYNK_WRITE(V0){

}
BLYNK_WRITE(V1){

}
BLYNK_WRITE(V2){

}
BLYNK_WRITE(V3){

}
BLYNK_WRITE(V4){

}

void setup() {
  Serial.begin(9600);
  Serial.print("Connecting to WiFi");
  WiFi.begin("Wokwi-GUEST", "", 6);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println(" Connected!");
  Blynk.begin(auth,ssid,pass); 

  dht.setup(dhtPin, DHTesp::DHT22);


}

void loop() {
  TempAndHumidity  dhtData = dht.getTempAndHumidity();
  float temperature = dhtData.temperature;
  float humidity = dhtData.humidity;
  float nitrogenValue = analogRead(nitro);
  float phosphorusValue = analogRead(phos);
  float potassiumValue = analogRead(potas);
  if(potValues.temperature!=temperature)
  Blynk.virtualWrite(V0,temperature);
  if(potValues.humidity!=humidity){
  Blynk.virtualWrite(V1,humidity);}
  if(potValues.nitro!=nitrogenValue)
  Blynk.virtualWrite(V2,nitrogenValue/4095 *100);
  if(potValues.phos!=phosphorusValue)
  Blynk.virtualWrite(V3,phosphorusValue/4095 *100);
  if(potValues.potas!=potassiumValue)
  Blynk.virtualWrite(V4,potassiumValue/4095 *100);


  potValues = {temperature,humidity,(nitrogenValue/4095 *100),(phosphorusValue/4095 *100),(potassiumValue/4095 *100)};
  delay(2000);
}