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Aboutthe site
The story of Midon Design and how this reference is put together
Midon Design was a small electronics company in Greer, South Carolina, that made kits for home automation hobbyists from 1999 until it stopped selling at the end of 2023. This page tells the story of its 1-Wire kit line, explains what the reference covers, and describes how the pages are written and checked.
Published September 28, 2026
A small kit maker for hobbyists
Midon Design was formed in 1999. Its background was in home automation and electronic design done privately for about two decades before that. By the late 1990s home automation had a growing following, but few companies were willing to make hardware in the small quantities hobbyists needed. The company set out to fill that gap with designs it had already built and tested for its own use, and it offered printed circuit boards and kits for people who did not want to wire everything by hand.
From the start the company published its schematics, object code and component sources on the web pages for each project. That openness is a large part of why the kits are still understood today: the circuits were never a black box. Over the years projects were added, and those that no longer drew interest were retired.
From TEMP05 to TEMP08
The first product to find a wide audience was the TEMP05, a serial interface between the 1-Wire bus and a PC. It logged the Dallas Semiconductor 1-Wire weather station and a string of DS18S20 thermometers, and over time it learned to read rain gauges, barometers and humidity sensors, up to 60 devices. TEMP05 production ended on June 30, 2003.
Its successor, the TEMP08, became the center of the line. It kept the plain-text serial approach, stored its options in memory instead of on jumpers, added a real-time clock and an RJ-12 jack, and supported many more sensor families. It was still offered in the company's final catalog.
In its last years the catalog had narrowed to the TEMP08, the RS232Relay, a small range of sensors and accessories such as the TEMP08 project case. Everything else was listed as historical project information, and the company stopped selling at the end of 2023.
Around the two interfaces the company built LOG08 and LOG08-II, loggers that could collect samples without a PC; 1WSwitch, an interface for switch and input devices; the 1WIO relay, input and LED module; the RELAY05 and RS232Relay relay boards; and a set of sensors, including the MD3020E humidity board. Alongside the 1-Wire work it offered the PROG05 programmer for the Motorola 68HC705C8, the CIR-II infrared interface and the STATX10 X-10 status display.
What this reference covers
This site describes the Midon Design kits and 1-Wire sensing in general, for readers who own one of the boards, find one in a drawer, or want to understand how 1-Wire networks were built. Every kit is discontinued, and nothing here can be ordered, repaired or supported. The aim is understanding: what each board did, how it was wired and configured, and how its sensors can be read with current hardware and software.
The pages fall into four groups. Kit pages describe each product, starting from the kit catalogue. The TEMP08 has a documentation set of its own, with instructions, software notes, a FAQ, HomeSeer setup and a page on RJ-11 versus RJ-12 jacks. Guides cover broader topics such as weather stations, humidity sensing, network wiring and the state of 1-Wire today. Reference pages collect documents, components and outside resources. The site map lists every page.
How the text is written and checked
The pages are written and edited by the site's editorial team. Facts about the kits come from the company's own published descriptions, manuals and specifications, rewritten in plain language. General statements about 1-Wire devices are limited to standard datasheet facts, such as a sensor's temperature range or family code, and the official datasheets are linked where they help. When a detail could not be confirmed, it was left out rather than guessed.
The illustrations on the site are generated with an AI image model from written descriptions. They are not photographs of real Midon hardware, and they carry no text. Diagrams and tables are drawn by hand. The AI notice explains the process in detail.
Corrections are welcome. If a page gets a fact wrong, the contact page explains how to report it.
Questions and answers
When was Midon Design active?
The company was formed in 1999 and sold kits until the end of 2023, when it stopped selling. Over that time its line ran from the TEMP05 serial 1-Wire interface through the TEMP08, the LOG08 and LOG08-II loggers, relay boards, programmers and sensor assemblies. Some products were withdrawn much earlier, such as TEMP05 in 2003.
Where should a TEMP08 owner start on this site?
Start with the TEMP08 overview page, which lists the supported sensors and connectors. From there, the instructions page covers setup and commands, the software page covers host programs, the FAQ collects common problems, and the HomeSeer page walks through that integration. The network wiring guide helps when readings are unreliable.
Are the pictures on this site photos of the kits?
No. The illustrations are generated with an AI image model from written descriptions, in a soft isometric style. They show the general idea of a topic, not real Midon hardware, and they contain no text. Diagrams and tables on the site are drawn by hand. The AI notice page explains the process.
How are the facts on these pages checked?
Kit details are taken from the company's own published descriptions, manuals and specifications and rewritten in plain language. General 1-Wire facts are limited to standard datasheet values, with the official datasheet linked where useful. Details that could not be confirmed were left out, and reported errors are corrected on the page.
Related pages
Products
All Midon Design 1-Wire kits in one catalogue: TEMP05, TEMP08, LOG08, 1WSwitch, 1WIO, relay boards and programmers, compared by host link, function, era.
TEMP08 Serial One Wire Interface
TEMP08 linked a PC serial port to the 1-Wire bus: up to 60 sensors for temperature, humidity, rain, wind and relays, plus a real-time clock and RJ-12 jack.
AI Notice
Illustrations here are generated by an AI image model in a soft isometric style and show no Midon hardware.
Contact
How to report a factual correction or suggest a 1-Wire resource to the editorial address, and why kits, repairs, orders and support are not offered here.
Site Map
Every page of the Midon Design 1-Wire reference in one list: kit pages, the TEMP08 documentation set, 1-Wire guides, reference hubs and the site pages.