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

LiquidCrystal_I2C lcd(0x27, 16, 2); 

void setup() {
  Serial.begin(115200); 
  Wire.begin();         
  // Initialize the LCD
  lcd.init();           
  lcd.backlight();     
  lcd.setCursor(0, 0);   
  lcd.print("I2C Scanner");

  Serial.println("\nI2C Scanner");
}

void loop() {
  byte error, address;
  int devicesFound = 0;

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Scanning...");

  Serial.println("Scanning for I2C devices...");

  for (address = 1; address < 127; address++) {
    Wire.beginTransmission(address);
    error = Wire.endTransmission();

    if (error == 0) {
      Serial.print("I2C device found at address 0x");
      if (address < 16) Serial.print("0");
      Serial.print(address, HEX);
      Serial.println("!");

      lcd.setCursor(0, 1);
      lcd.print("Found: 0x");
      if (address < 16) lcd.print("0");
      lcd.print(address, HEX);

      devicesFound++;
      delay(2000); // Display each device for 2 seconds
    } else if (error == 4) {
      Serial.print("Unknown error at address 0x");
      if (address < 16) Serial.print("0");
      Serial.println(address, HEX);
    }
  }

  if (devicesFound == 0) {
    Serial.println("No I2C devices found.\n");
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("No devices");
    lcd.setCursor(0, 1);
    lcd.print("found.");
  } else {
    Serial.println("Done.\n");
    lcd.setCursor(0, 1);
    lcd.print("Scan complete!");
  }

  delay(5000); // Wait 5 seconds before next scan
}