One Wire Communication Board

One Wire Communication Board

One Wire Communication Board

MS 1727




  • Digital serial bus communication with low speed data over a single line, Both signaling and driving power over a same single signal.
  • Protocol used in small inexpensive devices. Such as digital thermometer, weather instruments, laptop sub module, authenticate system and some cell phone battery packs.
  • Always master only initiates the communication and in overall in charge of the network.
  • Bus communicates with master and slave at a low data rate of 12kbps.
  • All terminals in the network are communicating by half-duplex mode.
  • Maximum of 255 nodes in each 1-wire network
  • Each data transaction will start with 480micro second low RESET pulse.

Features of node

  • Each 1-Wire slave has a unique 64-bit serial number that acts as its node address, which is stored in its ROM the 64 bit serial number again divided in to 3 groups.
  • The first byte stores the 8-bit family codes that identify the device type, which can be master or Slave.
  • The next six bytes store a customizable 48-bit individual address, device to be individually selected from among many that can be connected to the same 1- wire bus.
  • The last byte, the most significant byte (MSB), contains a CRC of a value based on data of first seven bytes.
  • All nodes will respond to a master on reception of RESET pulse.


  • Elevators
  • Automobiles
  • Process Control Industries
  • Industrial Automation

Environmental Conditions

  • Operating Temperature: -0°C to +50°C
  • Storage Temperature: -40°C to +85°C
  • 90% Relative Humidity (Non-condensing)

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