Develop Bluetooth SOS Emergency Bracelet Prototype (nRF52840 / ESP32) for Mobile App

Bluetooth SOS Emergency Bracelet Prototype for AMANE I am developing a personal safety mobile application called AMANE. I am looking for an experienced hardware engineer or IoT developer to design and build a working prototype of a Bluetooth emergency bracelet that connects to my mobile application. Project Goal Create a small wearable bracelet with a discreet SOS button. When the user presses the button, the bracelet must send a Bluetooth Low Energy (BLE) signal to the AMANE mobile application. The mobile application will then handle emergency actions such as GPS location sharing and emergency notifications. Preferred Hardware Seeed XIAO nRF52840 (preferred) ESP32-C3 Super Mini (alternative) Rechargeable LiPo battery Waterproof push button Small wearable form factor (bracelet or pendant) Required Features Bluetooth Low Energy (BLE) Low power consumption Rechargeable battery Compact design Reliable button press detection Android and iOS compatibility Deliverables Functional prototype Firmware source code Circuit schematic PCB design (if needed) Component list (BOM) Assembly instructions Nice to Have Experience with wearable devices Experience with Bluetooth emergency devices Experience with low-power electronics To Apply Please provide: Examples of similar hardware or IoT projects. Estimated timeline. Estimated total cost including prototype development. Suggested hardware improvements if applicable. This project may lead to future work for production-ready versions of the device. To confirm that you have read the project description, please start your proposal with the word "AMANE".