#include <Wire.h> 
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,16,2);

const int ledPin = 2;     // LED pin
#include <WiFi.h>
#include "DHTesp.h"
#include "ThingSpeak.h"

const int DHT_PIN = 15; // DHT22 sensor GPIO Pin
const char* WIFI_NAME = "Wokwi-GUEST"; // WiFi SSID
const char* WIFI_PASSWORD = ""; // WiFI Password
const int myChannelNumber = 2648965 ; // ThingSpeak channel number
const char* myApiKey = "0LXGN2O3ROWIZYVP"; // ThingSpeak API key
const char* server = "api.thingspeak.com"; // ThingSpeak server address

// Create an instance of the DHTesp library
DHTesp dhtSensor; 
// Create a WiFi client object
WiFiClient client;
void setup()
{
  Wire.begin(23, 22); // Initialize the I2C communication with SDA pin 23 and SCL pin 22.
 // Serial.begin(9600); /// Initialize the serial communication at a baud rate of 9600 bits per second.
  lcd.init();       // initialize the lcd 
  lcd.backlight();    // turn on the backlight
  pinMode(ledPin, OUTPUT); 





   Serial.begin(115200);
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22); // Initialize the DHT22 sensor
  WiFi.begin(WIFI_NAME, WIFI_PASSWORD); // Connect to the WiFi network
  while (WiFi.status() != WL_CONNECTED){
    delay(1000);
    Serial.println("Wifi not connected"); // Print a message if WiFi is not connected
  }
  Serial.println("Wifi connected !"); // Print a message if WiFi is connected
  Serial.println("Local IP: " + String(WiFi.localIP())); // Print the local IP address
  WiFi.mode(WIFI_STA); // Set the WiFi mode to station mode
  ThingSpeak.begin(client); // Initialize the ThingSpeak library
}

void loop()
{
  int16_t i = analogRead(34);
// Use the ternary operator to determine the moisture status based on the value of 'i'.
// If 'i' is less than 300, set 'msg' to "DRY"; if 'i' is greater than 700, set 'msg' to "WET"; otherwise, set 'msg' to "OK".
String msg = i < 30 ? "DRY" : i > 70 ? "WET" : "OK";

  lcd.clear();
  lcd.print("Soil: ");
  lcd.print(msg);
  if(i<=30){
  digitalWrite(ledPin, HIGH); // will turn on the LED(motor) if the soil is dry (i<300)
  }
  else {
  digitalWrite(ledPin, LOW);
  }

  lcd.setCursor(0, 1);  // Set cursor to the first column and second row
  lcd.print("SensorValue:");
  lcd.print(i);

  int soilMoistureValue = analogRead(34);
  // Read temperature and humidity from the DHT22 sensor
  TempAndHumidity  data = dhtSensor.getTempAndHumidity();

  // Set the value of field 1 in the ThingSpeak channel to the temperature
  ThingSpeak.setField(1,data.temperature);
  // Set the value of field 2 in the ThingSpeak channel to the humidity 
  ThingSpeak.setField(2,data.humidity); 
  ThingSpeak.setField(3,soilMoistureValue); 
  // Write the data to the ThingSpeak channel
  int status = ThingSpeak.writeFields(myChannelNumber,myApiKey); 
   lcd.clear();
  lcd.print("Temp: ");
  lcd.print(data.temperature);
    lcd.setCursor(0, 1);  // Set cursor to the first column and second row
  lcd.print("Humidity:");
  lcd.print(data.humidity);


Serial.println("moisture: " + String(soilMoistureValue, 3) + "%");
  Serial.println("Temp: " + String(data.temperature, 2) + "°C"); // Print the temperature value with 2 decimal places
  Serial.println("Humidity: " + String(data.humidity, 1) + "%"); // Print the humidity value with 1 decimal place
  
  if(status == 200){
    Serial.println("Data pushed successfully"); // Print a message if the data was successfully pushed to ThingSpeak
  }else{
    Serial.println("Push error" + String(status)); // Print an error message with the HTTP status code if there was an error pushing the data
  }
  Serial.println("---"); // Print a separator line

  delay(10000); // Delay for 10 seconds

}