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SDI-12 (Serial Digital Interface at 1200 baud) is an asynchronous serial communications protocol for intelligent sensors that monitor environment data. These instruments are typically low-power (12 volts), are used at remote locations, and usually communicate with a data logger or other data acquisition device. The protocol follows a master-slave configuration whereby a data logger (SDI-12 recorder) requests data from the intelligent sensors (SDI-12 sensors), each identified with a unique address. 〔(【引用サイトリンク】website=www.sdi-12.org )〕 ==History== The first version of SDI-12 was released in 1988. It was designed by a coalition which included the U.S. Geological Survey's Hydrologic Instrumentation Facility (HIF) and a group of private companies.〔(【引用サイトリンク】website=www.sdi-12.org/history.php )〕 The SDI-12 Specification is maintained by a non-profit corporation called the SDI-12 Support Group. The most recent upgrade was made in January, 2013.〔(【引用サイトリンク】website=www.sdi-12.org/specification.php )〕 (History of SDI-12 ) (SDI-12 Version 1.3 ) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「SDI-12」の詳細全文を読む スポンサード リンク
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