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A 1-Wire network is, as the name suggests, based around a single wire that allows bidirectional data transfer as well as, in most cases, providing power to the devices on the network. The name is in some ways a slight misnomer as you do need a ground connection as well. In the most basic form a 1-Wire network consists of a 1-Wire Master and a number of Slave devices. The master device is in most cases a PC Host adapter that interfaces the 1-Wire bus to either a Serial or USB port. The slave devices can be anything from a huge range, including native devices such as the DS18S20 temperature sensor and other devices such as the DS2438 that enable you to interface non 1-Wire devices such as humidity and pressure sensors into your 1-Wire network. |