Welcome to the website of HomeChip, which aims to be the best and cheapest supplier of 1-wire® and other sensing and control products in Europe.

Care Home Orders for access FOBs

We have had a large number of incorrect orders for orange fobs from Care Homes due to incorrect information being given to them by the previous supplier. If you are a Care Home and you want to order access fobs then please phone us on 01908 410175 and we will guide you through the process of placing your order.

New Products

Have a look at our new Raspberry Pi HAT. It supplies a single 1-wire interface, 6 low latency counters and a battery backed real time clock. It's ideal for monitoring renewable energy systems and data centres.


We would like to assure all our valued European customers that we are delighted to continue to serve them. There is, as yet, no change in the relationship of the UK to the EU. If such a change does take place then we will serve our EU customers from our French office in Toulouse.

New French phone number

We now have a French phone number: +33 5 81180761. We welcome calls from our valued EU customers on this number. Staff answering this phone will be able to speak English and French and will able to route the call to a Spanish speaking staff member if needed.

Contacting us

You can email us at info@homechip.com or phone us at +44 (0) 1908 410175. For full company details including our address follow the "About Us" link at the bottom of the page.

What is 1-wire?

1-wire is a technology defined by Dallas/Maxim and used in their range of iButtons and other 1-wire sensors which can measure and control a wide range of environmental parameters. Communication with the devices is via a two wire bus consisting of data and ground. Each device has a unique, factory programmed address which cannot be altered and which is guaranteed unique. This fact alone makes them useful for key access and identification systems, but they have many other useful functions ranging from non-volatile storage, to temperature and humidity sensing, switching and voltage measurement.

What is an iButton?

An iButton is a 1-wire component sealed into a small stainless steel can, approximately the size of a camera battery. This packaging makes them very rugged, and under normal conditions almost indestructible. Some have an inbuilt power source, such as the Thermochron range which can be set to independently measure temperature which they store internally and report when read periodically. Thermochrons can work from -40°C to +125°C and so are perfect for measuring and monitoring processes. Their uses are really only limited by your imagination.

As well as iButton and 1-wire components we supply a wide range of 1-wire sensors and controllers supplied by iButtonLink, as well as a range of readers, software and hardware accessories. Browse our catalogue for information and ideas.

Please note that all prices in the catalogue are quoted excluding VAT.

VAT at the UK rate of 20% will be added at the confirmation stage of your checkout. If you are VAT registered and outside the UK, but within the EU, please quote your VAT number when you register and we will bill you without VAT. Customers outside the EU will also not be charged VAT.