This tutorial showcases how to create a secure login system using Node.js, Express, and BLE technology. The project demonstrates how BLE scanning can verify the presence of an authorized device before granting access, offering an extra layer of protection for your applications.
Key Features:

Node.js Integration: Simplifies server-side logic using JavaScript.
BLE Device Scanning: Checks for the presence of an authorized device based on its MAC address.
Enhanced Security: Adds an additional layer of security to the login process.
Practical Example: Serves as a foundation for more advanced BLE-based applications.

details of this project :
https://www.bleuio.com/blog/building-a-secure-proximity-based-login-system-with-bluetooth-low-energy-ble/