#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <DHT.h>
#include <ESP8266WiFi.h>

#define LCD_ADDRESS 0x27  // Adjust this based on your LCD's I2C address
#define LCD_COLUMNS 16
#define LCD_ROWS 2

LiquidCrystal_I2C lcd(LCD_ADDRESS, LCD_COLUMNS, LCD_ROWS);

#define DHT_PIN 2  // Connect DHT sensor to pin 2
#define DHT_TYPE DHT22

#define WIFI_SSID "ICHIGO"
#define WIFI_PASSWORD "bleach1000"

#define THINGSPEAK_API_KEY "S2K8V97B8PM5VVNQ"
#define THINGSPEAK_HOST "api.thingspeak.com"

DHT dht(DHT_PIN, DHT_TYPE);

void setup() {
  Serial.begin(9600);

  lcd.init();                      // Initialize the LCD
  lcd.backlight();                 // Turn on the backlight
  lcd.clear();

  lcd.print("Temperature:");
  lcd.setCursor(0, 1);
  lcd.print("Humidity:");
  delay(2000);

  connectWiFi();
}

void loop() {
  float temperature = dht.readTemperature() + random(-20, 21) / 10.0;
  float humidity = dht.readHumidity() + random(-50, 51) / 10.0;

  lcd.setCursor(13, 0);
  lcd.print(temperature, 1);
  lcd.print("C");

  lcd.setCursor(9, 1);
  lcd.print(humidity, 1);
  lcd.print("%");

  Serial.print(F("Temperature: "));
  Serial.print(temperature, 1);
  Serial.print(F("°C\t"));
  Serial.print(F("Humidity: "));
  Serial.print(humidity, 1);
  Serial.println(F("%"));

  uploadToThingSpeak(temperature, humidity);

  delay(2000);
}

void connectWiFi() {
  WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
  Serial.print("Connecting to WiFi");

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println();
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
}

void uploadToThingSpeak(float temperature, float humidity) {
  WiFiClient client;
  if (!client.connect(THINGSPEAK_HOST, 80)) {
    Serial.println("Connection to ThingSpeak failed");
    return;
  }

  String data = "S2K8V97B8PM5VVNQ";
  data += THINGSPEAK_API_KEY;
  data += "&field1=";
  data += String(temperature, 1);
  data += "&field2=";
  data += String(humidity, 1);

  client.print("POST /update HTTP/1.1\n");
  client.print("Host: api.thingspeak.com\n");
  client.print("Connection: close\n");
  client.print("Content-Type: application/x-www-form-urlencoded\n");
  client.print("Content-Length: ");
  client.print(data.length());
  client.print("\n\n");
  client.print(data);

  Serial.println("Data sent to ThingSpeak");
  client.stop();
}