#include <WiFi.h>
#include <Wire.h> 
#include <LiquidCrystal_I2C.h>
#include <DHTesp.h>

LiquidCrystal_I2C lcd(0x27,20,4);

#define DHT_PIN 14
#define soil_PIN 34
#define relay 2

DHTesp dhtSensor;

const char *ssid = "Wokwi-GUEST";          // Change this to your WiFi SSID
const char *password = "";  // Change this to your WiFi password

void setup() {
  // put your setup code here, to run once:
  pinMode(soil_PIN, INPUT);
  pinMode(relay, OUTPUT);
  Wire.begin(21, 22);
  Serial.begin(115200);
  lcd.init();
  lcd.backlight();
  while (!Serial) {
    delay(100);
  }

  // We start by connecting to a WiFi network

  Serial.println();
  Serial.println("******************************************************");
  Serial.print("Connecting to ");
  Serial.println(ssid);
  WiFi.begin(ssid, password, 6);
  lcd.setCursor(0, 0);            //line 1st column, 1st row
  lcd.print("Connecting to");

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
    lcd.setCursor(0, 1);
    lcd.print(ssid);
    lcd.print("...");
  }

  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
  lcd.setCursor(0,2);
  lcd.print("WiFi connected");

  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
  Serial.println("DHT initiated");
  lcd.setCursor(0,3);
  lcd.print("DHT initiated");
  delay(250);
  lcd.clear();
  lcd.setCursor(2,1);
  lcd.print("AUTOMATED URBAN");
  lcd.setCursor(0,2);
  lcd.print("ALGRICULTURE SYSTEM");
  delay(500);
  lcd.clear();
}

void loop() {
  // put your main code here, to run repeatedly:
 //const char* soil_status = readMoisture();
int val = analogRead(soil_PIN);
int soil_percent = map(val, 0, 4096, 0, 100);
TempAndHumidity  data = dhtSensor.getTempAndHumidity();
Serial.println("Temp: " + String(data.temperature, 2) + "°C");
Serial.println("Humidity: " + String(data.humidity, 1) + "%");
Serial.println("---");

lcd.setCursor(0,0);
lcd.print("Temperature: ");
lcd.print(data.temperature, 2);
lcd.print(" C");
lcd.setCursor(0,1);
lcd.print("Humidity: ");
lcd.print(data.humidity, 1);
lcd.print("%");
lcd.setCursor(0,2);
lcd.print("Soil Moisture: ");
lcd.print(soil_percent);

if(soil_percent < 30)
  {
    digitalWrite(relay, LOW);
    delay(100);
  }
  else 
  {
    digitalWrite(relay, HIGH);
    delay(100);
  }

//delay(2000); // Wait for a new reading from the sensor (DHT22 has ~0.5Hz sample rate)

}

/*const char* readMoisture()
{
  int val = analogRead(soil_PIN);
  const char* soil_status = "\0";
  soil_status = val;
  /*if(val < 2165)
  {
    digitalWrite(relay, LOW);
    delay(100);
  }
  else if(val < 3135)
  {
    digitalWrite(relay, LOW);
    delay(100);
  }
  else 
  {
    digitalWrite(relay, HIGH);
    delay(100);
  }
  return soil_status;
}*/

TempAndHumidity readDHT22()
{
  TempAndHumidity  data = dhtSensor.getTempAndHumidity();
  Serial.println("Temp: " + String(data.temperature, 2) + "°C");
  Serial.println("Humidity: " + String(data.humidity, 1) + "%");
  Serial.println("---");
}

void lcdPrint(const char* soil_status, TempAndHumidity data)
{
  lcd.setCursor(0,0);
  lcd.print("Temperature: ");
  lcd.print(data.temperature, 2);
  lcd.print(" C");
  lcd.setCursor(0,1);
  lcd.print("Humidity: ");
  lcd.print(data.humidity, 1);
  lcd.print("%");
  lcd.setCursor(0,2);
  lcd.print("Soil Moisture: ");
  lcd.print(soil_status);
  delay(2000); // Wait for a new reading from the sensor (DHT22 has ~0.5Hz sample rate)
}