/*

Module name and code:	Emerging Technologies (SWE6206)
Student Name and ID	Darshan Patel - 2109302
Tutor:		Dr Mohammed Benmubarak
Assignment Number:	2
Assignment Title: 		Emerging Technologies based Industry Solutions

*/
/*
  ESP32 Advance Greenhouse 

  https://wokwi.com/projects/386619061354859521

  Copyright (C) 2024, Darshan Patel
*/

// Blynk Template Information
#define BLYNK_TEMPLATE_ID "TMPL5ehCDwZAZ"
#define BLYNK_TEMPLATE_NAME "Advance Greenhouse"
#define BLYNK_AUTH_TOKEN "S5lFMBmJzii6C5QlFyApPU2z_7btBHn8"

// Include Libraries
#include <DHTesp.h>
#include <Wire.h>
#include <ESP32Servo.h>
#include <LiquidCrystal_I2C.h>
#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>

// Blynk Authentication and Wi-Fi Credentials
char auth[] = "S5lFMBmJzii6C5QlFyApPU2z_7btBHn8";
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

// Pin Definitions
#define SOIL_MOISTURE_PIN 34
#define RAIN_SENSOR_PIN 35
#define DHT_PIN 17
#define BUZZER_PIN 5
#define RELAY_PIN 4
#define RELAYHEATER_PIN 18
#define WATERSPRINKLER_SERVO_PIN 14

// Servo Object for Watersprinkler
Servo watersprinklerServo;

// Thresholds and Intervals
const int buzzerThreshold = 20;
const float temperatureThreshold = 27;
const int soilMoistureThreshold = 30;
const int readInterval = 1000;

// DHT Sensor Object
DHTesp dht;

// LCD Display Objects
LiquidCrystal_I2C lcd = LiquidCrystal_I2C(0x27, 20, 8);
LiquidCrystal_I2C lcd2 = LiquidCrystal_I2C(0x27, 20, 8);

// Blynk Timer
BlynkTimer timer;

// Global Variables
float temperature, humidity, soilMoisture;  // Declare variables at global scope
static unsigned long lastReadTime = 0;  // Add this line to declare lastReadTime

// Setup Function
void setup() {
  Serial.begin(9600);
  dht.setup(DHT_PIN, DHTesp::DHT22);
  lcd.init();
  lcd.backlight();
  lcd2.init();
  lcd2.backlight();
  watersprinklerServo.attach(WATERSPRINKLER_SERVO_PIN);
  ledcSetup(0, 1000, 10);
  pinMode(RELAY_PIN, OUTPUT);
  pinMode(RELAYHEATER_PIN, OUTPUT);
  pinMode(BUZZER_PIN, OUTPUT);

  Serial.print("Connecting to WiFi");
  WiFi.begin("Wokwi-GUEST", "");
  while (WiFi.status() != WL_CONNECTED) {
    delay(100);
    Serial.print(".");
  }
  Serial.println(" Connected!");

  Blynk.begin(auth, ssid, pass);
  timer.setInterval(2500L, sendSensor);
}

// Loop Function
void loop() {
  Blynk.run();
  timer.run();

  if (millis() - lastReadTime >= readInterval) {
    float temperature, humidity;
    float soilMoisture, rainSensor;

    temperature = dht.getTemperature();
    humidity = dht.getHumidity();
    soilMoisture = analogRead(SOIL_MOISTURE_PIN);
    rainSensor = analogRead(RAIN_SENSOR_PIN);

    soilMoisture = map(soilMoisture, 0, 4095, 0, 100);
    rainSensor = map(rainSensor, 0, 4095, 0, 100);

    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Humidity: ");
    lcd.print(humidity);
    lcd.print("%");
    lcd.setCursor(0, 1);
    lcd.print("Temperature: ");
    lcd.print(temperature);
    lcd.print("C");
    lcd.setCursor(0, 2);
    lcd.print("SoilMoisture: ");
    lcd.print(soilMoisture);
    lcd.print("%");
    lcd.setCursor(0, 3);
    lcd.print("Rain Sensor: ");
    lcd.print(rainSensor);
    lcd.print("%");

    if (temperature > temperatureThreshold || soilMoisture < soilMoistureThreshold) {
      activateRelayAndAlert(soilMoisture);
    } else if (temperature <= 15 ) {
      turnonHeaters();
      lcd2.clear();
      lcd2.setCursor(0, 0);
      lcd2.print("Heaters are ON");
    } else {
      turnOffRelayAndAlert();
      turnoffHeaters();
    
    }

    lastReadTime = millis();
  }
  delay(10);
}

// Function to Send Sensor Data to Blynk
void sendSensor() {
  TempAndHumidity data = dht.getTempAndHumidity();
  temperature = data.temperature;
  humidity = data.humidity;

  soilMoisture = analogRead(SOIL_MOISTURE_PIN);
  soilMoisture = map(soilMoisture, 0, 4095, 0, 100);  // Map the soil moisture value
  
  Blynk.virtualWrite(V0, temperature);
  Blynk.virtualWrite(V1, humidity);
  Blynk.virtualWrite(V2, soilMoisture);
Blynk.virtualWrite(V3, digitalRead(RELAY_PIN));
Blynk.virtualWrite(V4, digitalRead(RELAY_PIN));


}

// Function to Activate Relay and Trigger Alerts
void activateRelayAndAlert(float soilMoisture) {
  digitalWrite(RELAY_PIN, LOW);
  if (soilMoisture < buzzerThreshold || temperature > 33 ) {
    beepBuzzer(5);  // Five short beeps for low soil moisture
    activateWatersprinkler();
  } else {
    beepBuzzer(1);  // One short beep for other conditions
  }
}

// Function to Turn Off Relay and Stop Alerts
void turnOffRelayAndAlert() {
  digitalWrite(RELAY_PIN, HIGH);
  noTone(BUZZER_PIN);
}

// Function to Turn On Heaters
void turnonHeaters() {
  digitalWrite(RELAYHEATER_PIN, LOW);
  beepBuzzer(2); // Two short beep for temperature less or equal to 15
}

// Function to Turn Off Heaters
void turnoffHeaters() {
  digitalWrite(RELAYHEATER_PIN, HIGH);
  noTone(BUZZER_PIN);
}

// Function to Generate Beep Patterns
void beepBuzzer(int pattern) {
  for (int i = 0; i < pattern; i++) {
    tone(BUZZER_PIN, 1000);
    delay(200);
    noTone(BUZZER_PIN);
    delay(200);
  }
  delay(500);  // Pause between patterns
}

// Function to Activate Watersprinkler
void activateWatersprinkler() {
  watersprinklerServo.attach(WATERSPRINKLER_SERVO_PIN);
  watersprinklerServo.write(180);
  delay(10);
}

// Function to Deactivate Watersprinkler
void deactivateWatersprinkler() {
  watersprinklerServo.detach();
}