Java Ring

                                                            1-Wire is a device communications bus system designed by Dallas Semiconductor Corp. that provides low-speed data, signaling, and power over a single signal.^[1] 1-Wire is similar in concept to I²C, but with lower data rates and longer range. It is typically used to communicate with small inexpensive devices such as digital thermometers and weather instruments. A network of 1-Wire devices with an associated master device is called a MicroLAN.

                                                               One distinctive feature of the bus is the possibility of using only two wires: data and ground. To accomplish this, 1-wire devices include an 800 pF capacitor to store charge, and to power the device during periods when the data line is active.

                                                             Dependent on function, native 1-wire devices are available as single components in integrated circuit and TO92packaging, and in some cases a portable form called an iButton that resembles a watch battery. Manufacturers also produce devices more complex than a single component that use the 1-wire bus to communicate.

                                                    1-Wire devices may be one of many components on a circuit board within a product, may be a single component within a device such as a temperature probe, or may be attached to a device being monitored. Some laboratory systems and other data acquisition and control systems connect to 1-Wire devices using cables with modular connectors or withCAT-5 cable, with the devices themselves mounted in a socket, incorporated in a small PCB, or attached to the object being monitored. In such systems, RJ11 (6P2C or 6P4C modular plugs, commonly used for telephones) are popular.