# 1 Wire Pi Plus

**Type:** Product page · **SKU:** CE07448 · **Brand:** [AB Electronics](https://core-electronics.com.au/brands/ab-electronics-australia) · **GTIN:** 7426787870040
**Page:** https://core-electronics.com.au/1-wire-pi-plus.html ([markdown](https://core-electronics.com.au/1-wire-pi-plus.html.md))

The 1 Wire Pi Plus is a communication board supporting the 1-Wire® protocol designed for use on the Raspberry Pi . A 5V buffered I2C port is also provided on the board.

## Pricing

- **Price:** $28.60 (inc GST) — $26.00 AUD, exc GST
- **Quantity discounts:** 10+ $24.96 (exc GST) · 25+ $24.18 (exc GST)

## Availability & dispatch

- In stock, ships same business day if ordered before 2PM (Australia/Sydney).
- We can dispatch 4 today; more stock is typically available with a 10–14 day lead time.

## Description

The 1 Wire Pi Plus is a communication board supporting the 1-Wire® protocol designed for use on the [Raspberry Pi](https://core-electronics.com.au/raspberry-pi-4-model-b-4gb.html). A 5V buffered I2C port is also provided on the board.

The 1-Wire® port on the 1 Wire Pi Plus is based around a DS2482-100 I2C to 1-Wire® bridge device. The DS2482-100 provides bi-directional protocol conversion between the I2C port on the Raspberry Pi and any attached 1-Wire® slave devices. An ESD Protection Diode is used to protect the 1 Wire Pi Plus and Raspberry Pi from electrostatic spikes on the 1-Wire® port. Connections to the 1-Wire® port can be made through the RJ-12 socket or the solder points on the PCB. We have a knowledge base article for configuring and using the 1-Wire® port on your Raspberry Pi.

The 1 Wire Pi Plus is powered through the host Raspberry Pi using the GPIO port and extended pins on the GPIO connector allow you to stack the 1 Wire Pi Plus along with other expansion boards.

Space is provided on the board for a 1-Wire® iButton device. iButtons are small metal packed modules that can be used for a wide range of functions from data loggers to temperature monitoring. More information about iButtons can be found on the Maxim Integrated website. To use an iButton on the 1 Wire Pi Plus you will need to solder a DS9094F PCB clip onto the board. Please note that the DS9094F should be positioned to match the orientation marked on the PCB and the + sign on the connector is actually linked to the ground side of the iButton devices.

A 5V input port is also provided allowing you to use an external power supply on the 1-Wire® interface, reducing the load on the Raspberry Pi. If you choose to use the external 5V input please remove the jumper on the board to isolate the Raspberry Pi 5V bus.

**Features**

- 1-Wire® to I2C host interface with ESD protection diode.
- Stackable with other Raspberry Pi accessory boards.
- Buffered 5V I2C port.
- External 5V power input for 1-Wire® interface.
- I2C address selection via solder jumpers.
 
**Specifications**

- Vdd (5V pin): 5.0V
- Maximum current on 1-Wire pins: ±20 mA
- I2C SDA/SCL voltage: 5.0 V
- I2C port current: 100 mA
 
**Documents**

- [1 Wire Pi Plus - 3D CAD File (STEP Format)](https://core-electronics.com.au/attachments/localcontent/1-wire-pi-plus-2_56737397ac0.zip)
- [Schematic Drawings](https://core-electronics.com.au/attachments/localcontent/schematic-1-wire-pi-plus-v2_14407f99736.pdf)
- [Code Libraries and Demos](https://www.abelectronics.co.uk/kb/article/3/owfs-with-i2c-support-on-raspberry-pi)
- [Datasheets](https://core-electronics.com.au/attachments/localcontent/DS2482S_25444c22414.pdf)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/1/-/1-wire-pi-plus-1.jpg)