#define BLYNK_TEMPLATE_ID "TMPL38PHdd0rP"
#define BLYNK_TEMPLATE_NAME "Smart Fertigation"
#define BLYNK_AUTH_TOKEN "LF8qeIU7Qabzyp4R7OuNm-VUqHznfmHL"

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

char ssid[] = "Wokwi-GUEST";
char pass[] = "";
const int slideSwitchPin = 2; // Change this to the digital pin connected to the slide switch
const int moistureSensorPin = A0; // Change this to the analog pin connected to the moisture sensor

// Define the threshold for activating the slide switch
const int moistureThreshold = 600; // Change this threshold as per your requirement

//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("Connected to ESP32!");
  pinMode(slideSwitchPin, OUTPUT);

  // Set up serial communication
  Serial.begin(9600);
}

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(V5, rtValue[1]); // Potassium
}

void loop() {
  // put your main code here, to run repeatedly:
  Blynk.run();
  timer.run();
  
  int moistureValue = analogRead(moistureSensorPin);
  moistureValue = map(moistureValue, 0, 4095, 0, 1000); // Map the sensor value to 0-1000

  // Print the moisture value
  Serial.print("Moisture Level: ");
  Serial.println(moistureValue);

  // Check if moisture level is below threshold
  if (moistureValue < moistureThreshold) {
    // Slide switch is activated
    Serial.println("Slide switch activated");
    digitalWrite(slideSwitchPin, HIGH); // Turn ON slide switch
  } else {
    // Slide switch is deactivated
    Serial.println("Slide switch deactivated");
    digitalWrite(slideSwitchPin, LOW); // Turn OFF slide switch
  }

  // Add a delay before the next reading
  delay(1000);
}