AlertAngel

AlertAngel is an elderly-care monitoring system that provides real-time health tracking, fall detection, and instant alerts for caregivers.

Form factor

AlertAngel devices are inspired by the GitHub Universe ID Cards i.e AlertAngel devices are also ID cards with a screen.

What It Does

• Continuous monitoring of heart rate, SpO₂, temperature, and motion
• Fall detection with immediate alerts
• Simple on-device display for vitals and warnings
• Medicine reminders and cognitive test buttons
• Notifications through Telegram and a mobile app
• Health data logging for future review
• System alerts like low battery and phone disconnected

How It Works

The ESP32 collects sensor data, checks for irregularities, updates the display, and sends instant notifications to caregivers.

Why It Matters

AlertAngel offers an affordable, easy-to-use solution for families and caregivers needing reliable, continuous elderly monitoring.

👉 For full technical details, visit:
https://github.com/AlertAngel/tech_stack

Workflow

graph TD
    Start([System Start]) --> Init[Initialize ESP32 and Sensors]
    Init --> Collect[Data Collection Loop]
    
    Collect --> Sensors{Read Sensors}
    Sensors --> HR[Heart Rate and SpO2]
    Sensors --> Temp[Body Temperature]
    Sensors --> Motion[Motion Detection]
    
    HR --> Check{Check Values}
    Temp --> Check
    Motion --> Check
    
    Check -->|Normal| Normal[Normal Status]
    Check -->|Alert| Critical[Critical Alert]
    
    Critical --> Buzzer[Sound Alarm]
    Critical --> Notify[Send Notification]
    
    Notify --> App[Mobile App]
    Notify --> Message[Telegram Message]
    
    Normal --> Log[Save Data]
    App --> Log
    Message --> Log
    
    Log --> Wait[Wait]
    Wait --> Collect

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