References

Third-party APIs, libraries, and external code used in this project.

Frontend

Tailwind CSS (loaded from CDN): https://cdn.tailwindcss.com
Google Fonts — Inter: https://fonts.google.com/specimen/Inter
Chart.js (charting library; loaded via jsDelivr): https://www.chartjs.org/
Lucide (icon library; loaded via unpkg): https://lucide.dev/
placehold.co (placeholder avatar image): https://placehold.co/

Backend

Express (express): https://expressjs.com/
Mongoose (mongoose): https://mongoosejs.com/
MongoDB Node.js Driver (transitive dependency via Mongoose): https://www.mongodb.com/docs/drivers/node/current/
JSON Web Tokens (jsonwebtoken): https://github.com/auth0/node-jsonwebtoken
Password hashing (bcryptjs): https://github.com/dcodeIO/bcrypt.js
CORS middleware (cors): https://github.com/expressjs/cors
HTTP request logging (morgan): https://github.com/expressjs/morgan
Debug utility (debug): https://github.com/debug-js/debug
Environment variables (dotenv): https://github.com/motdotla/dotenv
Development auto-reload (nodemon): https://nodemon.io/

IoT Device

Arduino WiFiS3 (WiFi library): https://docs.arduino.cc/tutorials/uno-r4-wifi/
ArduinoHttpClient (HTTP client for Arduino): https://github.com/arduino-libraries/ArduinoHttpClient
SparkFun MAX3010x sensor library (MAX30105 support): https://github.com/sparkfun/SparkFun_MAX3010x_Sensor_Library
NTPClient and pool.ntp.org (time synchronization): https://github.com/arduino-libraries/NTPClient (https://www.pool.ntp.org/)
Arduino LED Matrix: https://docs.arduino.cc/libraries/arduino-led-matrix/