The Radio Frequency Identification technology (RFID) is among the most effective automated identification technologies. It enables individuals to determine the identity of a person or object by the use of serial numbers. Each electronic tag has a unique serial number. The identification is done wirelessly via radio waves where data is exchanged from the electronic tag to the RFID reader. These readers are manufactured to emulate myriad physical forms. This diversifies the application of the tag thus enabling it to meet different requirements of the area it is being deployed to. The flat plastic tags are the most popular and highly used RFID reader. It is mainly used to give individuals access to secure regions of buildings.

Currently, RFID technology has a wide array of applications as a result of the dire need for technological advancement. For instance the RFID technology maybe used to operationalize point of scale scanning, package identification, toll-road passes, access control, retail anti-theft systems, warehouse stock control, inventory and surgical instruments. The process is aided by used of RFID tags which are implanted on the skin of animals and people or embedded in a plethora of substances including library books, shipping labels, product boxes, tags badge names and aircrafts. This explains the vast use of arduino RFID door lock to enhance their security.

The arduino RFID door lock eliminates the need for a door handle as it uses an electric strike to close and open a door. This creates a permanent security solution especially to buildings that are out-of-bounds to unauthorized individuals. This technology consists of two parts the arduino microcontroller which is mounted on the inside of the door and connected to the RFID reader via data cables. The reader is mounted on the other side of the door (outside).

The following things are essential for the construction of an RFID door lock:
i. An Arduino decimillia
ii. Jumper wires
iii. Drilling tool
iv. Project box
v. Parallax RFID reader
vi. Standoffs
vii. Standard Servo
viii. Deadbolt lock
ix. LEDs
x. Breakaway headers
xi. Soldering iron

An RFID hard-coded card is used to record the tags for entry to be read by the RFID reader which then authorizes the closing or opening of a door. However, the Arduino microcontroller must study the list of recorded tags to ensure they correspond with the valid tags. If the match is correct the microcontroller turns the servo which in turn changes the color of LED. The servo will turn in accordance to the last tag reading which maybe commanding it to close or open the door lock. Therefore, without a valid RFID tag individuals cannot access the building since the door can neither be opened nor closed.

The effectiveness of the arduino door lock depends on how the device is mounted on the door. The wires, LEDS and connectors should be rightfully placed to ensure the device works. The height of the standoff should be precise as it determines how the components will be attached on the outside of the door. The measurements should be done accurately and holes drilled only when necessary. With that in mind individuals can now easily enhance the security of their homes and businesses using arduino RFID door locks.



Important References:

• The History of RFID
• FDA Radiofrequency Identification (RFID)

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