LTE-Based Personal Emergency Response System (PERS) | Keil MDK + STM32L4 | Smart Safety Device

Описание: This video presents the design and development of a Personal Emergency Response System (PERS) built on the Keil MDK environment using STM32L4 (ARM Cortex-M4).

The device is specifically designed for elderly people and children, providing real-time emergency assistance through LTE communication networks. In critical situations such as falls or SOS activation, the system immediately sends location data and voice alerts directly to guardians—without relying on cloud servers.

🔑 Key Features
📡 LTE Communication (Band 3 / 28 – optimized for Nigeria)
📍 Multi-GNSS Positioning (GPS, GLONASS, Galileo, BeiDou)
🚨 Automatic Fall Detection (IMU-based algorithm)
📩 SMS-based Remote Configuration
📞 VoLTE Emergency Calling
🔋 Ultra-Low Power Design (48+ hours operation)
🔐 Secure Boot & OTA Firmware Update (MCUboot)
💧 IP67 Waterproof & Wearable Design
⚙️ Technology Stack
Keil MDK (uVision5, ARM Compiler 6)
STM32L4 Microcontroller
CMSIS-RTOS2 (RTX5)
LTE Modem (Quectel EG915N / alternatives)
Embedded C Firmware Architecture
🎯 Application
Personal safety monitoring
Elderly care systems
Child tracking and protection
Remote emergency alert systems
📌 Highlights in This Video
System architecture overview
Task design using RTOS
Fall detection algorithm logic
LTE modem control via AT commands
Power management strategy
OTA update mechanism

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