Week 4 - Testing component (RFID, LCD)

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            For this week, I tested the component to be used for the RFID door lock with alert system. The component tested is the RFID reader and LCD module. The RC522 RFID module based on MFRC522 IC from NXP is one of the most inexpensive RFID options that users can get online for less than four dollars. It usually comes with a RFID card tag and key fob tag having 1KB memory. 

            For the RFID reader, it is connected to the Arduino Uno. The pin connections are shown below. 




            For the codings, it is taken from the library named  RC522. The coding is run using Arduino IDE. The coding is then compiled and uploaded to the Arduino Uno. 






            To test the RFID, open the serial monitor in the Arduino IDE. Then place the RFID card on the RFID reader. The card id will then be shown in the serial monitor. Copy the id number and paste it in the coding so that the RFID will only allow the RFID card open the door. 

            After that, I tested the LCD display module using the library named liquid crystal I2C. The pin connections between the LCD display module and the Arduino Uno is displayed below. 

            To test the LCD display module, I used the example code in the library. The example code use is Hello World. The code is then uploaded into the Arduino Uno and the LCD display the Hello World letters.





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