RFID Reader to 1-Wire reader, iButton

RFID Reader to 1-Wire reader, iButton
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To 9 €23.30 *
From 10 €22.13 *

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Delivery time appr. 1-3 workdays

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RFID Reader according to 1-Wire Bus, RFID - iButton reader iButton, security and... more
Product information "RFID Reader to 1-Wire reader, iButton"

RFID Reader according to 1-Wire Bus, RFID - iButton reader
iButton, security and authentication system on 1-Wire basis

Contactless reader unit for reading RFID* cards or keys via the 1-Wire bus.

RFID cards are read like normal iButton keys via 1-Wire bus. Each RFID card or key has a unique and uniquely assignable serial number. The only difference is that the RFID's are interrogated wirelessly.
The RFID reader is intended for permanent installation in machines, doors or devices. Ideally suited as an access system for front doors or secure areas in companies and public authorities.
The data transfer between RFID card or key and the 1-Wire bus is serial. Only three wires with a power supply, data and ground line are required.

Examples of use

  • Security and authentication system
  • Goods tracking within logistics
  • Access rights for devices and machines
  • Inventory



RFID tags

RFID UNIQUE 125kHz, 64 bit

Reading distance

2 - 10cm, depending on the quality of the cards or buttons to be read

Power supply

6.5 to 32VDC

Power consumption

approx. 12mA without LEDs


5 wires, approx. 40cm with open cable ends

Cable Assignment

Yellow: Power supply 6.5 - 32VDC
Grey: Ground, GND
White: 1-Wire Data
Green: Cathode (minus) for green LED
Brown: Cathode (minus) for red LED


Plastic housing, M12 thread

LED indicator

LED green and red (no series resistor necessary)

LED Power consumption

approx. 10mA per colour

Bus interface

iButton, 1-Wire bus with 5VDC voltage


Like all 1-Wire and iButton components, each RFID tag has a unique and unambiguous serial number.
Compared to standard iButton, the data transfer is contactless. As with all 1-Wire modules, several reader units can be operated on one 1-Wire bus.
The RFID reader has the following 1-Wire commands:
- Read Rome, 33h
- Search Rom, F0h

The number of the RFID tags is transmitted as follows:
CRC (1 byte), 0x00, serial number with 5 bytes, Family Code 01h (DS1990)


28 x 9 mm (DxT, visible range) 15mm installation depth, M12 plastic thread


Fixing by M12 threaded screw connection

Scope of delivery

reading unit with approx. 20cm connection cable, tension spring for mechanical fixation

No series resistors are required for the LEDs. To switch on an LED, only the corresponding cable must be connected to GND.

*Reading of UNIQUE 125 kHz RFID tags (Manchester coding) via the 1-Wire protocol

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