Design and implementation of fingerprint access control system based on ZigBee wireless network

this paper mainly introduces a kind of fingerprint access control system based on ZigBee wireless network design and implementation method, specify when passengers should fingerprints collected and stored in the system at the information desk PC, and then assign rooms;Guests entered the room according to the fingerprint module, the system will be fingerprint information through ZigBee coordinator node module and network to transmit the fingerprint characteristic value to management system and the fingerprint information stored, if consistent with the electromagnetic lock open, allowed to enter the room, does not conform to the issued a warning sound.Additional access control system can control the corresponding fingerprint information storage room and remove, such as is required for a security incident broke in situation is special open mode can be set up.System software design consists of two aspects of the bottom and upper machine.


The introduction
Hotels are a place where people stay short and change quickly, which brings convenience and safety hazards to the people who provide them.Often in the news, the suspect in the news of the suspect in the fake hotel guest to open the door of the room to steal, although there are surveillance equipment and see the suspect, but solving the case is not easy.Even if the amount of loss is small, but some id CARDS, credit CARDS and other things, it is troublesome to apply for a replacement.Hotels access control system from the original key to the current popular induction card, the goal of the implementation is to be safe, convenient.However, in these systems, there is a fundamentally unsolvable problem where the key can be copied, the sensor card can be stolen, or the user identity cannot be identified.
Therefore, the ultimate goal of the development of the gated system can only be biometric identification.At present, the common biometric identification system has fingerprint, iris, etc. Relatively, the fingerprint identification is simpler, and there is more choice.Therefore, if the hotel and hotel access control system is changed to the fingerprint access system, the thief will have nothing to do and greatly improve the security of housing.
But one problem that needs to be addressed is how to the fingerprint information will be collected.If the fingerprint information is not successful, the alarm signal will be generated and the access control function will be realized.
The design idea mainly considers in the following aspects:

Biometric identification to prevent counterfeiting;
When checking in, the guest needs to register the fingerprint information and store it on the system's upper computer.The terminal will collect the fingerprint information and compare it with the upper computer via the ZigBee wireless network.The match will open the electromagnetic lock, otherwise the error will be prompted, and a number of errors will generate an alarm will not be opened again.

System hardware design
The main components of ZigBee's wireless fingerprint access terminal are divided into three main components:

ZigBee node module.
The ZigBee node module has a size of 15*10 cm, and its power supply mode is square port USB, DC2. 1 power base (5V).Serial port communication is performed by using the USB transfer serial port function (pl-2303).
With the Debug interface, it is compatible with TI standard simulation tool, which brings out all IO ports, commonly used serial port pins and 5V/3.3V pins and other functional interfaces.

The conclusion
The tenant can no longer worry about room card theft, or falsely use another identity into the room, his fingerprint is the key to the room, at the same time of convenience for passengers, further improve the performance of the hotel safe.

Centralized management control of the reception desk.
When checked in at the customer service desk management computer can directly input fingerprint information entry, when the check-out is removed from the entrance guard management system fingerprint information of the customers, and be able to access to any fingerprints for remote control.At the same time, the system can record the opening time of the fingerprint and send it to the front desk management system, and it can generate customer billing information and make it easier to manage.

The supervision room authorizes manual intervention function.
When some special events, such as: fire, kidnapping, catch the thief, etc., the monitoring center can be directly authorized to control the switch of access control points, so that the flexible handle emergency events, ensure users get more time and reduce the loss, etc.
Because the identity information, the corresponding relationship between the fingerprint of the fake id hotel also has a huge deterrent effect, has a poor record of customer if identity information does not accord with the fingerprint will automatically generate alarm signal.

MATEC2
scheme of fingerprint eigenvalue information is usually transmitted by GPRS, Wifi, ZigBee and other modes.Look from the actual application effect, the wireless mode sensing module installation is simple, the equipment maintenance workload small, the advantages of the engineering costs are relatively cheap makes it have a huge impact to the traditional cable transmission mode.
FIG. 1 schematic diagram of the system structure

3. 1
CC2530 core board The separation of the core plate and the function board is more convenient for the maintenance and testing of the equipment.It has 21 universal I/O pins and two 20mA current absorbing or current supply capacity.The working band is 2.4gHZ.Low power consumption, receiving current <30mA, emission current < 50mA.Use 2. 4G full -to antenna, reliable transmission distance of 250 meters.Automatic reconnect is as high as 110 meters.

4 System software design 4 . 1 FIG. 3
FIG. 2 overall architecture of the software