The SparkFun RFID Qwiic Reader is a simple I²C based RFID breakout board for the ID-3LA, ID-12LA, and ID-20LA readers. Simply plug a reader into the headers and use a Qwiic cable, then scan your 125kHz ID tag and the unique 32-bit ID will be shown on the screen. The unit comes with a read LED and buzzer, but don't worry, there is a jumper you can cut to disable the buzzer if you want. Utilizing our handy Qwiic system, no soldering is required to connect it to the rest of your system. However, we still have broken out 0.1"-spaced pins in case you prefer to use a breadboard.

Utilizing the onboard ATtiny84A, the Qwiic RFID takes the six byte ID tag of your 125kHz RFID card, attaches a time stamp to it, and puts it onto a stack that holds up to 20 unique RFID scans at a time. This information is easy to get at with some simple I²C commands.

Note: The I²C address of the RFID Reader is 0x7D and is jumper selectable to 0x7C (software-configurable to any address). A multiplexer/Mux is required to communicate to multiple SHTC3 sensors on a single bus. If you need to use more than one RFID Reader sensor consider using the Qwiic Mux Breakout.

The SparkFun Qwiic Connect System is an ecosystem of I²C sensors, actuators, shields and cables that make prototyping faster and less prone to error. All Qwiic-enabled boards use a common 1mm pitch, 4-pin JST connector. This reduces the amount of required PCB space, and polarized connections mean you can’t hook it up wrong.

Note: This product does not come with the RFID reader. Check below for compatible readers.

• Schematic
• Eagle Files
• Hookup Guide
• Arduino Library
• Python Package
• GitHub