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The 1 Wire Pi Zero from AB Electronics UK is a communication board supporting the 1-Wire® protocol designed for use on the Raspberry Pi Zero. A 5V buffered I2C port is also provided on the board. The 1 Wire Pi Zero can be securely fitted to your Raspberry Pi using our mounting kit pack.
The 1-Wire® port on the 1 Wire Pi Zero 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 Zero 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 Zero 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 Zero along with other expansion boards.
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 solder jumper on the board to isolate the Raspberry Pi 5V bus.
Using the 1-Wire w1 Subsystem with the 1 Wire Pi
Configuring and using OWFS and the 1-Wire® port on your Raspberry Pi
DS2482S (1-Wire Interface)
OWFS with I2C support on Raspberry Pi
1 Wire with DS18S20 digital thermometer
OWFS with I2C support on Orange Pi
1 Wire Pi
1 Wire Pi Plus 1.0
1 Wire Pi Zero - 3D CAD File (STEP Format)
Click to download schematic PDF.
Click image to enlarge
The 1 Wire Pi Zero is supplied with the 40 pin GPIO connector, RJ12 connector and 2 pin jumper unsoldered.
Before using the 1 Wire Pi Zero you will need to solder the two connectors onto the PCB. We suggest soldering the 40 pin GPIO connector first and then the RJ12 connector. The RJ12 connector is supplied clipped onto the PCB.
Download and print our PCB Header Assembly Jig to hold your circuit board when soldering the header pins.
The 1-Wire® port on the 1-Wire Pi can be accessed through the female RJ12 socket or the solder points on the PCB. An ESD protection diode is fitted between the RJ12 port and the 1-Wire® interface IC.
The pinout connections for the RJ12 port are shown below:
The 1 Wire Pi Zero includes two address selection solder jumpers which can be bridged with solder to give you up to 4 different I2C addresses.
1 Wire interface for the Raspberry Pi
Mounting kit to use on our Raspberry Pi + and 2 boards
RJ12 Plug for flat cable
RJ12 Plug for round cable
RJ12 to RJ12 6P6C Cable 3m
This development board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by abelectronics.co.uk to be a finished end-product fit for general consumer use. As such, the goods being provided are not intended to be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including product safety and environmental measures typically found in end products that incorporate such semiconductor components or circuit boards. Persons handling the product(s) must have electronics training and observe good engineering practice standards. This development board/kit does not fall within the scope of the European Union directives regarding electromagnetic compatibility, restricted substances (RoHS), recycling (WEEE), FCC, CE or UL, and therefore may not meet the technical requirements of these directives or other related directives. Note: documents in Portable Document Format (PDF) require Adobe Acrobat Reader 5.0 or higher to view, download Adobe Acrobat Reader or other PDF reading software for your computer or mobile device.
1 Wire Pi Zero
Price: £10.49 each (including VAT: