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Mastering the Raspberry Pi by Warren W. Gay

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CHAPTER 13

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1-Wire Driver

The 1-Wire protocol was developed by Dallas Semiconductor Corp. initially for the iButton.37 This communication protocol was attractive enough to be applied to other devices and soon adopted by other manufacturers. This chapter provides an overview of the 1-Wire protocol and how it is supported in the Raspberry Pi.

1-Wire Line and Power

The 1-Wire protocol actually uses two wires:

  • Data: The single wire used for data communication
  • Ground: The ground or “return” wire

The 1-Wire protocol was designed for communication with low–data content devices like temperature sensors. It provides for low-cost remote sensing by supplying ...

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