1. Introduction
This manual provides essential information for the proper use and care of your Whadda WPI417 RFID cards. These cards are designed for various prototyping and programming applications, offering reliable identification and data storage capabilities. Please read this manual thoroughly before using the product.
2. Safety Information
- Keep RFID cards away from strong magnetic fields, which can interfere with their operation.
- Avoid bending or physically damaging the cards, as this may compromise their internal components.
- Do not expose cards to extreme temperatures or direct sunlight for prolonged periods.
- This product is not a toy. Keep out of reach of small children.
3. Product Overview
The Whadda WPI417 RFID cards are passive 13.56 MHz transponders, each equipped with 1K Byte of EEPROM memory. They are supplied in a pack of 10, suitable for integration into various access control, identification, or data storage systems.

Image 1: A set of 10 Whadda WPI417 RFID cards.
4. Specifications
Key Features:
- Resonance frequency: 13.56 MHz
- Memory: 1K Byte EEPROM
- Operating temperature: -10 °C to +75 °C (14 to 167 °F)
- Identification distance: 0-5 cm (0 to 1.97")
- Service time: 100,000 re-writes
General Specifications:
| Attribute | Value |
|---|---|
| Manufacturer | Velleman |
| Part Number | WPI417 |
| Item Weight | 3.17 ounces |
| Product Dimensions | 2.95 x 1.38 x 6.1 inches |
| Item Model Number | WPI417 |
| Color | Various (typically white) |
| Material | Various (typically PVC) |
| Item Package Quantity | 1 (containing 10 cards) |
| Batteries Included? | No |
| Batteries Required? | No |
5. Setup
The Whadda WPI417 RFID cards are passive devices and do not require any initial setup or power. They are ready for use upon receipt. Integration involves connecting them with a compatible 13.56 MHz RFID reader/writer and a host system (e.g., microcontroller, computer) for reading and writing data to the card's EEPROM memory. Refer to the documentation of your specific RFID reader and development environment for detailed integration instructions.
6. Operation
To operate the RFID cards, bring a card within the identification distance (0-5 cm) of a compatible 13.56 MHz RFID reader. The reader will then be able to communicate with the card. Depending on your application, you can perform the following operations:
- Reading Data: The reader can retrieve data stored in the card's 1K Byte EEPROM memory.
- Writing Data: Data can be written to the card's EEPROM memory, up to 100,000 re-writes.
- Identification: The unique identifier of the card can be read for authentication or tracking purposes.
Ensure your RFID reader and software are configured correctly for 13.56 MHz operation and the specific protocol used by these cards (e.g., ISO/IEC 14443 Type A).
7. Maintenance
The Whadda WPI417 RFID cards require minimal maintenance. Follow these guidelines to ensure their longevity:
- Clean cards with a soft, dry cloth. Avoid abrasive cleaners or solvents.
- Store cards in a cool, dry place, away from direct sunlight and extreme temperatures.
- Avoid placing heavy objects on the cards to prevent bending or cracking.
- Do not puncture or scratch the card surface, as this may damage the internal antenna or chip.
8. Troubleshooting
- Card not detected: Ensure the card is within the reader's identification distance (0-5 cm). Verify the reader is powered on and functioning correctly. Check for strong electromagnetic interference in the vicinity.
- Read/Write errors: Confirm the RFID reader is compatible with 13.56 MHz passive RFID cards and the correct communication protocol. Ensure the card is held steadily within the reader's field during operation.
- Intermittent detection: This may be caused by environmental interference or a weak reader signal. Try moving the reader or card to a different location.
9. Support and Warranty
For technical support or inquiries regarding the Whadda WPI417 RFID cards, please contact your retailer or the manufacturer, Velleman. Information regarding warranty terms and conditions can typically be found on the manufacturer's official website or provided with your purchase documentation.





