For more advanced security applications, you might also want to explore our RFID door lock system using Arduino ... I2C interface and CR2032 battery backup. It also has an AT24C32 EEPROM IC (32KB ...

This project is an automatic door opening and closing system using an Arduino UNO, an ultrasonic sensor, red and green LEDs, a 16x2 LCD with I2C, and a servo motor. The door opens when a person is ...

The LCD display is activated, and the RTC module is started. If the RTC is not running, the program sets the time and date to the current compilation time using F(DATE), F(TIME). Time and Date ...