Description
What it is
The CLRC663 board is a complete module for reading and writing RFID/NFC cards. This device is designed to facilitate the integration of RFID/NFC read/write functionality into electronic and Arduino projects.
Features
- Full protocol NFC card reader module
- Enables reading and writing of RF RFID ICs
- Compatible with Arduino and other microcontrollers
What it is for
The CLRC663 module is ideal for security, authentication, and contactless interaction projects. It can be used to create secure access systems, for example for doors or lockers, where an approved RFID card activates a relay to unlock a mechanism. Additionally, it is suitable for access monitoring and control applications.
Tutorial: How to use CLRC663 NFC Reader Module
The CLRC663 module is a versatile device for reading and writing RFID/NFC cards. Ideal for security, authentication, and contactless device interaction projects.
What you need
- Arduino Uno/Nano
- USB cable
- RFID/NFC card
- Arduino IDE software
Steps
- Connect VCC and GND of the module to 5V and GND of the Arduino.
- Connect SDA of the module to pin A4 of the Arduino.
- Connect SCL of the module to pin A5 of the Arduino.
- Insert the CLRC663 module code into the Arduino IDE software.
- Check the connections and upload the code to the Arduino.
- Start the code and test the reading of an RFID/NFC card.
- Verify the correct reading and writing of data.
- Repeat the tests with different RFID/NFC cards to ensure compatibility.
Example code
/* Includi la libreria CLRC663 */
#include <CLRC663.h>
CLRC663 nfc;
void setup() {
Serial.begin(9600);
nfc.init();
}
void loop() {
if (nfc.isCardPresent()) {
Serial.print("ID: ");
Serial.println(nfc.getUID());
}
}
Mini project
Create a secure access system for a door or locker. When an approved RFID card is read by the module, the Arduino can activate a relay to unlock a mechanism.
Common mistakes
- Check that all connections are secure.
- Ensure that the module is correctly configured in the software.
- Verify the compatibility of the RFID/NFC cards used.
- Resolve any power supply issues with the module.
Recommended accessories
- 5V Relay
- RFID/NFC Cards
- Electronic Door
- Buzzer
Frequently asked questions
How can I check the power supply of the module?
Check the voltage on the VCC and GND pins of the module.
What types of RFID/NFC cards are compatible?
Check the module’s datasheet for the complete list of support.




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