This smart smoke detector is equipped with NB-IoT technology to guarantee the timely warning of a fire even if the power supply or the Internet connection is down. It can interact with other smart devices, even if remotely located, and it may, for example, automatically trigger a sprinkler system and open smoke ventilation windows. In addition, the device is able to alert the fire department about an emergency independently. In this way, it provides protection even if no one is at home.