1-Wire iButton reader

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Accessories > 1-Wire iButton reader

Introduction to the product

Compatible with: | TFT100 |

IButton reader.jpg

One of the implemented features for fleet management devices is 1-Wire data protocol, which can be used for iButton reading. It is the most straight-forward way to implement driver authorization in your vehicles.

1-Wire RFID readers are great in these use cases:

  • Immobilizer - prevent anyone from starting the vehicle without scanning an iButton first.

Technical characteristics

Interface 1-Wire Interface
Wiring 1-wire signal, Brown wire = Ground
Case material Plastic (polyacetal)
Ring material Ferrite steel with chrome plating
Signal joint material Brass with chrome plating
Fastening method M12 screw
Wire dimensions 2 wires Ø 0,25 mm2
Cable length 40 cm
Operating temperature -40 ºC to +85 ºC
Operating humidity Up to 70%


To connect the 1-wire iButton reader, simply connect the 1-Wire Signal wire from the reader to the 1-Wire Data pin on the device, and connect the ground wire to the same grounding used for the device.
1 1-wire Data Sends iButton ID
2 GND (-) Ground

Device configuration

TFT100 iButton Read Notification.png

The reader works as soon as it is connected, but the iButton isn't used anywhere other than displayed in the iButton I/O element. In order to use it for the Immobilizer scenario, the device must have the scenario enabled. Then, iButton check can be enabled to only accept iButtons specified in the iButton list under the 1-Wire tab.

TFT100 1-Wire.png