#define BLYNK_TEMPLATE_ID "TMPL2dzny1zfb"
#define BLYNK_TEMPLATE_NAME "Smart soil management"
#define BLYNK_AUTH_TOKEN "2gf-NYKudpMq2ti_Wu6vZCxuxOURNcr7"

#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;

// Potentiometer is connected to GPIO 34 (Analog ADC1_CH6) 
const int potPin = 34;

// variable for storing the potentiometer value
int potValue = 0;

#define ncom 3 //  number of commands.
char commar[ncom] = {0x1,0x3,0x5}; // Actual commands
// Response Strings can be stored like this
char respar[ncom][30]={"Nitrogen value is: ","Phosphorous value is: ","Potassium value is: "};
uint8_t rtValue[ncom]; // Store the return values from the custom chip in here. you can use the same
//values to forward to the IOT part.

BlynkTimer timer;

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

  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);  
  
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
  
  timer.setInterval(2000L, sendData); // Send data every 2 seconds

  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]); // send the command stored in ncom array through serial2
    if (Serial2.available())
    { //if serial2 data is there
      rtValue[i]= Serial2.read();// read serial2 
      Serial2.flush();// flush serial2, very important. otherwise extra bits may interfere with communication
      Serial.print(respar[i]); // print the response array to the console.
      Serial.println(rtValue[i]); // print the return value with newline at console
    }
  }

  //send data to blynk
  
  Blynk.virtualWrite(V0, t);  //Temperature
  Blynk.virtualWrite(V1, h);  //Humidity

  Blynk.virtualWrite(V2,  potValue); //soil Moisture

  Blynk.virtualWrite(V4, rtValue[0]); //Phosphorous
  Blynk.virtualWrite(V3, rtValue[2]); //Nitrogen
 // Blynk.virtualWrite(V,  rtValue[1]); //Potassium

}

void loop() {
  // put your main code here, to run repeatedly:
  Blynk.run();
  timer.run();
}