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RFID Read/Write Module, Serial

Product Code: 28440
Excl. VAT: £44.95 Incl. VAT: £53.94
You will earn 44 Robo Points for buying this product
Designed in cooperation with Grand Idea Studio (www.grandideastudio.com), the Parallax Radio Frequency Identification (RFID) Read/Write Module provides a low-cost solution to read and write passive RFID transponder tags up to 3 inches away.

The RFID transponder tags provide a unique serial number and can store up to 116 bytes of user data, which can be password protected to allow only authorized access.

The RFID Read/Write Module can be used in a wide variety of hobbyist and commercial applications, including access control, user identification, robotics navigation, inventory tracking, payment systems, car immobilization, and manufacturing automation.

Read/Write compatible only with the RFID R/W 54mm x 85mm Rectangle Tag. Read compatible with all RFID tags sold by Parallax.


  • Low-cost method for reading and writing passive, 125 kHz RFID transponder tags 
  • Up to 116 bytes of user data storage on a single tag 
  • Optional security features prevent tag from being read or written without password 
  • Bi-color LED for visual indication of status 


Read/Write Compatible With:

  • RFID R/W 54mm x 85mm Rectangle Tag 


Read Compatible With:

  • RFID 54mm x 85mm Rectangle Tag 
  • RFID 50mm Round Tag 
  • RFID Disk Tag 25mm 
  • RFID Blue Eye Key Fob Tag
  • Power requirements: +5 VDC; < 10 mA idle, approx. 100-200 mA active
  • Communication: asynchronous serial 9600 bps, (8N1); 5 V TTL-level, non-inverted
  • Dimensions: 3.25 x 2.45 in (8.26 x 6.2 cm)

Product Attachments

View FileRFID Read Write Doc.    Size: (132.99 KB)
View FileRFID Read Write Source Code    Size: (4.21 KB)

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RFID Read/Write Module, Serial