How a smart lock works consists of three main components: the mechanical lock component, the interface (such as a keypad or device that makes the lock smart), and the digital key. A smartphone or a specialized key fob or key fob lock specially configured for this purpose replaces the physical key for these electronic locks and wirelessly authenticates to unlock the door automatically.
The key can be sent to the recipient’s smartphone via standard messaging protocols, such as email or SMS, or via a dedicated app. Smart locks allow users to grant access to third parties through virtual keys. It is possible for the recipient to unlock the smart lock using their mobile device within the time frame previously specified by the sender after receiving this key.
Nowadays, most electronic locks are mainly based on 51 series single-chip microcomputers (AT89051), equipped with corresponding hardware circuits, to complete the configuration, storage, identification, and display of passwords, to drive electromagnetic actuators and detect their driving current values, to receive sensor alarm signals, to send data and other functions.
The microcontroller accepts the entered code and compares it with the password stored in EEPROM. The electromagnetic actuator will be unlocked if you enter the correct password; if you enter the wrong password, you will need to enter it again, but you can enter it up to three times. If it is not correct three times, the microcontroller will send an alarm to the intelligent monitor through the communication line.
The single-chip microcomputer sends each unlocking operation and the current value of the driving current of the electromagnetic actuator to the intelligent monitor as status information, and at the same time sends the alarm information received from the sensor interface to the intelligent monitor as the basis for intelligent analysis.

1) What are the components of a smart lock?
The following are the components of a smart lock.
#1. Front and rear panels
The panel is the appearance of the smart lock. From the panel, you can directly see the difference between the smart lock and other locks. The stability and function of the smart lock are directly determined by the internal structure. Multiple steps are involved in this process, including design, mold making, and surface treatment. Therefore, relatively speaking, manufacturers with more panel styles have stronger design and development capabilities and better stability.
#2. Lock body
The lock body is the bridge connecting the door and the lock. The quality of the lock body directly determines the service life of the product. This is the most basic technology in mechanical technology, and it is also the lifeblood of fingerprint locks. Therefore, the manufacture of the lock body is the most difficult problem to solve in the industry at present. If you are considering the wholesale of smart locks, you can see the technical level of the manufacturer from the lock body.
#3. The interface
The interface can be said to be the keypad of the smart door lock of the machine, or connected to the electric lock and the smart device for adapting the smart lock.
#4. Center Engine
The engine in the smart lock can be compared to the helm of the ship, it is the electronic and mechanical connection device, the energy conversion center. Plays an important role in linking the past and the future. If the smart lock’s motor stops or is blocked, the lock will automatically open and cannot be locked.
#5. Digital Key
Digital keys refer to all conventional ways that can open smart locks. This includes unlock buttons, fingerprints, or passwords that can be saved on a smartphone app.
#6. Display
The display screen enables you to unlock more conveniently and quickly, making the fingerprint lock more intelligent. The setting of the LCD screen is not a simple accumulation of materials but also involves the rational design of software and circuits.
Furthermore, when management software is combined with actual smart door locks, a more efficient system can be provided, especially for commercial environments including Airbnb and short-term rentals, offices, commercial and retail units, and shared spaces.