Arduino Time Attendance System with RFID | Random Nerd ...

It contains an RFID reader that reads RFID tags;

Our setup has a real time clock module to keep track of time;

When the RFID reader reads an RFID tag, it saves the current time and the UID of the tag in an SD card;

The Arduino communicates with the SD card using an SD card module;

You can set a check in time to compare if you are in time or late;

If you are on time, a green LED lights up, if you...

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MFRC522 RFID Reader with Arduino Tutorial | Random Nerd ...

Caution: You must power this device to 3.3V!

Circuit

Reading Data from a RFID tag

After having the circuit ready, go to File > Examples > MFRC522 > DumpInfo and upload the code. This code will be available in your Arduino IDE (after installing the RFID library).

Then, open the serial monitor. You should see something like the figure below:

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Approximate the RFID card or the keychain to the reader. Let the reader and the tag closer until all the information is displayed.

This is...

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Related topics : rfid card reader serial arduino / rfid tag reader arduino / rfid card reader serial / rfid library arduino download / rfid card reader device