This is a simple app that allows you to automatically enter and exit the common entrance of an apartment, automatically register the parking location, check the parking location, and detect emergency situations by using the "Samart Phone Key" app, the BLE common entrance reader, and the underground parking lot BLE emergency bell device.

* main function
- Automatic entrance to the common entrance: If the smartphone is registered in the common entrance, the smartphone key is in operation, and the BLE common entrance terminal is installed, you can automatically enter and exit the common entrance of the apartment.

- Parking location registration: Register the parking location using the underground parking lot's BLE emergency bell and Bluetooth communication. If the parking location is registered properly, you can check the parking location on the wall pad (unit device) within the household.

- Check parking location: If you register your parking location even once, you can check the last time you registered your parking location and the underground parking pillar number.

- Emergency: If an emergency situation occurs in the underground parking lot, pressing the emergency button will sound a warning light or siren on the BLE emergency bell in the underground parking lot and display the emergency location in the disaster prevention room.