Subsections
The 1-Wire ® resp. One-Wire bus from Maxim (Maxim/Dallas) describes a serial interface
that uses just one data wire and is used both as a power supply and as a transmit and
receive line. However, a return (GND) is required. Every 1-Wire chip has
a unique ID number by which it can be addressed. So several 1-Wire devices can be
connected on a single bus.
Maxim offers a variety of 1-Wire-Components: Serial-, USB-,
I2C-adapters, thermometers, switches(up to 8 channels), EEPROMs, Clocks, A/D-converters,
digital potentiometer. You really get everything you need for home automation.
An overview of the major components can be found in the appendix
under A.2.
You may also connect iButton ® parts (NV-RAM, EPROM, EEPROM, Temperature,
Humidity, RTC, SHA, Logger).
The 1-wire-bus in principle consists of two twisted lines, in accordance with
corresponding topologies longer distances up to 150 m should not be a problem.
Cat5 twisted pair Ethernet cable is often used for the wiring.
For the assignment of the individual cores, different approaches exist. Maxim
uses 6-pin modular jacks and plugs (RJ-11) and has created its own standard,
but this does not fit the 8-pin RJ-45 plug stuff. Further standards are
described in the appendix (chapter A.1).
You will also find informations on the topology of the bus at Maxim, their
website offers everything you need to deal with 1-wire.
© 2001-2015 The fli4l-Team - 26 April 2015