Danalock is an automated smart home locking solution by a company with the same name:
Figure 10: Danalock and corresponding smartphone app; source: www.businesswire.com
You can lock the Danalock via the smartphone app by sending data, which is AES-256 encrypted, over Bluetooth Low Energy.
To know more about Danalock, visit https://danalock.com/.
It automatically detects via Bluetooth Low Energy whenever you are nearby and unlocks itself. Since the lock also has Wi-Fi capabilities, like any other IoT device, it can make its current state data available over Wi-Fi and you can check the state of the lock when you are away, over the internet.