#define BLYNK_TEMPLATE_ID "TMPL6_ark4qc2"
#define BLYNK_TEMPLATE_NAME "Hydroponic farming"
#define BLYNK_AUTH_TOKEN "STjE-HZuGj3HQicdw-Ip1qE5R2eFhR3N"

#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include "DHT.h"
#include <BlynkSimpleEsp32.h>

#define LED_PIN 15 
const int potPin = 33;

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define OLED_RESET    -1
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

double dist;
boolean b_pumpworkingFlag;
DHT dht14(14, DHT11);

#include <WiFi.h>
#include <WiFiClient.h>
DHT Sensor(5, DHT11);
char auth[] = BLYNK_AUTH_TOKEN;

// Your WiFi credentials.
// Set password to "" for open networks.
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

double fnc_ultrasonic_distance(int _t, int _e) {
  unsigned long dur = 0;
  digitalWrite(_t, LOW);
  delayMicroseconds(5);
  digitalWrite(_t, HIGH);
  delayMicroseconds(10);
  digitalWrite(_t, LOW);
  dur = pulseIn(_e, HIGH, 18000);
  Serial.print("Echo Duration: ");
  Serial.println(dur);
  if (dur == 0) return 999.0;
  return (dur / 57);
}

void setup() {
  pinMode(35, INPUT);
  pinMode(32, OUTPUT);
  pinMode(2, OUTPUT);
  pinMode(4, INPUT);
  pinMode(18, OUTPUT);
  pinMode(14, INPUT);
  pinMode(12, OUTPUT);
  pinMode(15, OUTPUT);
  pinMode(33, INPUT);

  Serial.begin(115200);
  Serial.flush();
  while (Serial.available() > 0) Serial.read();

  dht14.begin();

  b_pumpworkingFlag = false;

  if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("SSD1306 allocation failed"));
    for (;;) ;
  }

  display.display();
  delay(2000);
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);

  Blynk.begin(auth, ssid, pass);

  Serial.println("Setup complete");
}

void loop() {
  Blynk.run();
  Serial.println("Loop iteration");

  yield();

  // Read sensor data
  double temperature = dht14.readTemperature();
  double humidity = dht14.readHumidity();

  // Display temperature and humidity on separate lines
  String line1 = "Temp: " + String(temperature, 1) + "C";
  String line2 = "Humidity: " + String(humidity, 1) + "%";
  String line3;

  if ((analogRead(35) < 100)) {
    digitalWrite(32, HIGH);
    line3 = F("Light: ON ");
  } else {
    digitalWrite(32, LOW);
    line3 = F("Light: OFF");
  }

  int potValue = analogRead(potPin);

  if (potValue > 2000) { 
    digitalWrite(LED_PIN, HIGH);
    b_pumpworkingFlag = true;
    line3 = F("Pump: ON ");
  } else {
    digitalWrite(LED_PIN, LOW);
    b_pumpworkingFlag = false;
    line3 = F("Pump: OFF");
  }

  // Adjust these thresholds based on your specific requirements
  const int humidity_threshold = 60;  // Percentage
  const int light_threshold = 10000;  // Lux
  const int min_water_level = 2;      // Minimum water level in cm
  const int max_water_level = 40;     // Maximum water level in cm

  int mappedWaterLevel = map(potValue, 0, 4095, 0, 100);;
  
  // Map potentiometer value to a range suitable for water level
  int waterLevel = map(potValue, 0, 4095, 0, 100); // Adjust the mapping range as needed

  String line5 = "Water Level: " + String(waterLevel) + "%";

  String line4 = "Humidity OK: " + (humidity > humidity_threshold ? String("Yes") : String("No"));

  String line6 = "Light for Farming: " + (analogRead(35) > light_threshold ? String("Yes") : String("No"));

  display.clearDisplay();
  display.setCursor(0, 0);
  display.print(line1);
  display.setCursor(0, 10);
  display.print(line2);
  display.setCursor(0, 20);
  display.print(line3);
  display.setCursor(0, 30);
  display.print(line4);
  display.setCursor(0, 40);
  display.print(line5);
  display.setCursor(0, 50);
  display.print(line6);
  // Send additional data to Blynk using Blynk.virtualWrite
  Blynk.virtualWrite(V1, b_pumpworkingFlag ? 1 : 0);  // Update Blynk LED Widget for pump
  Blynk.virtualWrite(V2, temperature);        // Update Blynk Gauge Widget
  Blynk.virtualWrite(V3, String(humidity));  // Update Blynk Label Widget
  Blynk.virtualWrite(V4, analogRead(35) < 100 ? 1 : 0);  // Update Blynk LED Widget for light
  Blynk.virtualWrite(V5, mappedWaterLevel);             // Update Blynk Label Widget

  delay(1000);
  display.display();
  display.clearDisplay();
}\