I am mainly here for the Bluetooth.
Most repeated is about deprecated BlueZ tools:
hciattach, hciconfig, hcitool, hcidump, rfcomm, sdptool, ciptool, and gatttool were deprecated by the BlueZ project in 2017. If you are following a tutorial that uses them, there is a chance that it might be out of date
Python BLE Client: https://stackoverflow.com/a/63751113/7721752