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Wiegand 26 34 126KHz EM RFID Reader

Purchased from Amazon.com. This is the item.

Wiring Guide

There are 7 wires exiting the back of this reader. The ESP-RFID project makes provision for 9-wire devices, but this device does not have the Orange nor Brown wires.

Wire Color Definition ESP-RFID Relay Board Terminal
Red 12V DC Power VIN
Black Ground GND
Green D0 (Data0) D0
White D1 (Data1) D1
Gray ?? WG
Yellow ?? BUZ
Blue ?? LED

According to the notes in the shipment, all other wires can be ignored.