RFID Tag EM4100 (2 Pack)

Description

What it is

RFID key fobs readable at 125KHz EM4100 are identification and security devices suitable for custom projects or controlled access applications.

Features

• Type: RFID NFC Tag Key Fob Readable 125KHz EM4100 ID Card
• Material: ABS
• Chip: EM4100, compatible with TK4100ID

What it is for

RFID tags can be used to create custom access systems. By installing a tag on a key and using an RFID reader, access to labs or offices can be controlled. Ideal for both beginners and expert designers.

Tutorial: How to use 2 Pieces RFID NFC Tag Key Fob Readable 125KHz EM4100 ID Card

These RFID NFC tags 125KHz EM4100 ID Cards are perfect for home security or custom identification projects. Ideal for beginners and intermediates.

What you need

• Arduino Uno
• USB cable
• RFID reader
• 3d printer (optional)

Steps

1. 1. Download the Arduino code from the RFID library.
2. 2. Connect the tag pins to Arduino (VCC to 5V, GND to GND, SDA to A4, SCL to A5).
3. 3. Upload the code to Arduino.
4. 4. Try to read the tag with an RFID reader.
5. 5. If you want to customize, print a design on a key.
6. 6. Check the datasheet for further details.
7. 7. Try to write a new ID on a tag.
8. 8. Verify the read with the reader.

Example code

```void loop() {  if (rfid.readCard()) {    Serial.println("Tag letto");  }}```

Mini project

Create an access system with an RFID tag and a reader. Install a tag on a key and use the reader to control access.

Common mistakes

• If the tag is not read, check the connections.
• If the code does not upload, verify the RFID library.
• If the reader does not detect the tag, check the battery.
• If the tag does not write, verify compatibility with the reader.

Recommended accessories

• RFID Reader
• Arduino Shield RFID
• 3d printer
• USB cable

Frequently asked questions

How can I customize the tags?
Print a design on a key and apply the RFID tag on top.

Why doesn’t it read the tag?
Check the connections and compatibility with the reader.

How can I write a new ID on a tag?
Check the datasheet for specific steps.

Which pins should I connect?
VCC to 5V, GND to GND, SDA to A4, SCL to A5.