1-Wire Communication

The basis of 1-Wire technology is a serial protocol using a single data line plus ground reference for communication. 1-Wire protocol uses CMOS/TTL logic and operates at a supply voltage ranging from 2.8V to 6V.

Overview of the 1-Wire BUS

1-Wire provides low-speed data, signaling, and power over a single conductor. It is similar in concept to I2C


There are two types of 1-Wire protocol:

  • Dallas 1-Wire Protocl
  • MaxDetect 1-Wire Protocol