LoRa and Bluetooth-based IoT alarm clock device for hearing-impaired people

Waking up in the morning represents a daily routine activity for the most part of the people who use common sound alarm clocks or who use their mobile phone as an alarm clock. For hearing-impaired people these solutions are not suitable. Other systems are equipped also with vibration motors and, thus, let the user choose if vibrations or sound signal are triggered when the alarm starts. These systems, though, require the time adjustment whenever the device is unplugged or when power outage takes place. Moreover, there is no solution available that gives a feedback to the caregivers, in order to be noticed that the user has been indeed waken by the alarm system. Through this paper, we propose an alarm clock system based on vibrations motors, ultrasonic sensors, Bluetooth and LoRa technology and server to wake the user, to ascertain the awakening and to send notifications to the caregivers. In addition, to mitigate the need to adjust the time in the case of a power failure, through the connection to LoRa server and to the battery operation, the time can be automatically updated.