#define BLYNK_TEMPLATE_NAME "ANBU SIVAM B"
#define BLYNK_TEMPLATE_ID "TMPL3uOVh2tUW"
#define BLYNK_TEMPLATE_NAME "ANBU SIVAM B"
#define BLYNK_AUTH_TOKEN "13cbsUY9aI42UBaYbtZQ5Y5olVBVFJXe"

#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include "DHTesp.h"
#include <HardwareSerial.h>

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

const int DHT_PIN = 15;
DHTesp dhtSensor;


const int potPin = 34;


int potValue = 0;

#define ncom 3 
char commar[ncom] = {0x1,0x3,0x5}; 
char respar[ncom][30]={"Nitrogen value is: ","Phosphorous value is: ","Potassium value is: "};
uint8_t rtValue[ncom]; 

BlynkTimer timer;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial2.begin(15200, SERIAL_8N1, 16, 17); 

  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);  
  
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
  
  timer.setInterval(2000L, sendData); 

  Serial.println("Hello, ESP32!");
}

void sendData() {
  float t = dhtSensor.getTemperature();
  float h = dhtSensor.getHumidity();
  
  if (isnan(h) || isnan(t)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }

  Serial.print("Humidity: ");
  Serial.print(h);
  Serial.print("%\t");
  Serial.print("Temperature: ");
  Serial.print(t);
  Serial.println(" °C");

  potValue = analogRead(potPin);
  Serial.println("Moisture: " + String(potValue));

  for (uint8_t i = 0; i< ncom;i++)
  {
    Serial2.print((char)commar[i]); 
    if (Serial2.available())
    { //if serial2 data is there
      rtValue[i]= Serial2.read();
      Serial2.flush();
      Serial.print(respar[i]); 
      Serial.println(rtValue[i]); 
    }
  }

  
  
  Blynk.virtualWrite(V6, t);  
  Blynk.virtualWrite(V1, h);  

  Blynk.virtualWrite(V5,  potValue); 

  Blynk.virtualWrite(V2, rtValue[0]);
  Blynk.virtualWrite(V3, rtValue[2]); 
  Blynk.virtualWrite(V4,  rtValue[1]); 

}

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