Children, elderly individuals, medical patients, and women often face situations where they need immediate help but cannot safely or discreetly use a smartphone. Dialling numbers or navigating a phone interface during emergencies can be slow, stressful, or even impossible, increasing the risk in critical moments.
A compact DIY SOS alert device, small enough to be worn like a wristwatch or integrated into a simple switch. With a single touch or button press, the device instantly sends an SOS message to a preconfigured phone number using a GSM network—ensuring help can be alerted quickly and discreetly.
Key Features
- One-touch SOS activation using capacitive touch or a push button
- GSM-based communication using the SIM800L or similar GSM modules
- Compact 3 cm IndusBoard Coin for wearable or pocket-sized designs
- Predefined emergency contact for instant alerts
- Low-power 3.3V battery operation
- Simple serial communication with the GSM module
- Flexible form factor suitable for wristbands, pendants, or concealed switches
Applications
- Personal safety devices for women and children
- Emergency alert systems for elderly people and medical patients
- Wearable SOS solutions for lone workers
- Safety accessories for travelers
- DIY and educational projects focused on IoT and personal security
This DIY SOS device demonstrates how a simple touch can trigger life-saving communication. By combining a compact IndusBoard Coin with GSM connectivity and capacitive touch sensing, the project offers a practical, low-cost solution for personal safety—proving that effective emergency systems don’t need complex interfaces or bulky hardware.