Advanced Raspberry Pi: Raspbian Linux and GPIO Integration

© Warren Gay 2018

Warren GayAdvanced Raspberry Pihttps://doi.org/10.1007/978-1-4842-3948-3_14

14. 1-Wire Driver

Warren Gay¹ 

(1)

St. Catharine’s, Ontario, Canada

 

The 1-Wire protocol was developed by Dallas Semiconductor Corp. initially for the iButton.¹⁵ 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, but the ground wire is not counted:

• 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 ...