Wireless SOS Button

Context: Elderly people or anyone in an emergency might need a simple way to call for help in another room. Build a Wireless SOS Alert system that sends a distress signal across a distance without any wires.

Task: Similar to the wireless doorbell, use one microcontroller as a transmitter with a clearly marked SOS push-button, and another as a receiver with an alarm. Program the transmitter to send a radio message or signal when its SOS button is pressed. Program the receiver to listen for that signal and, when received, sound a loud buzzer and maybe flash red LEDs to attract attention. Ensure the system is reasonably instantaneous and perhaps include a reset on the receiver to stop the alarm once help arrives.

Expected Output: A personal emergency alert system. In a demonstration, pressing the SOS button on the transmitter unit (for example, in one corner of the house/class) causes, almost immediately, a loud alarm and blinking light on the receiver unit placed elsewhere. This continues until someone hits the reset on the receiver. This project emphasizes community health and safety, showing how technology can assist elder care and emergency response at home.