ekkes BTLE example APP helps developers to integrate Bluetooth LE devices.

Discover all BT LE Devices nearby
Connect and disconnect
Explore Services and Characteristics
Test Notifications and Write values to the Device

ekkes BTLE example demonstrates in detail HowTo integrate:

HeartRate Monitor
Addimat Lock
NFC Reader via BT LE

This is NOT a production-ready APP !
This APP demonstrates HowTo integrate BT LE Devices into your own APPs

Sourcecode is available at Github.
The APP was developed with Qt 5.15 and QtQuickControls2.