Personal Safety Keychain using IoT

Personal security is a key global problem, particularly for vulnerable groups in urban and remote places, and current solutions are sometimes limited by lack of portability, cellular network dependency, and subscription fees. The new Smart Personal Safety Keychain, an Internet of Things (IoT) gadget that gets beyond these restrictions using a hybrid architecture, is designed, implemented, and evaluated in this study. A NEO-6M GPS module and an ESP32 microcontroller are used in the system to collect position data, which is subsequently analyzed and transmitted via Bluetooth Low Energy (BLE) to a custom Android application. The system's primary novelty is that it employs a smartphone as a gateway, sending emergency notifications to pre-defined contacts via SMS that includes real-time geocoordinates and a deep link to Google Maps. This eliminates the need for a separate GSM module inside the keyring. Experimental results demonstrate reliable operation in a range of outside settings, successful coordinate acquisition with an average precision of ≤5 meters, and an end-to-end alert latency of less than 15 seconds, confirming the system's efficacy. The project unquestionably establishes a framework for developing extremely portable, reasonably priced, and energy-efficient personal safety solutions that enhance public safety by utilizing ubiquitous smartphone connectivity.