Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: Tom Pollard, polla contributed around May 20, 2008 Jim Studt's original library was modified by Josh Larios. Tested in arduino-0010 – Tom Pollard, Jan 23, 2008 Modified to calculate the 8-bit CRC directly, avoiding the need for the 256-byte lookup table to be loaded in RAM. Updated to work with arduino-0008 and to include skip() as of 6. Tested in Arduino 11 alpha with 12 sensors.

Modified to work with larger numbers of devices - avoids loop. Version 2.0: Modifications by Paul Stoffregen, January 2010: Search fix from Robin James Use direct optimized I/O in all cases Disable interrupts during timing critical sections (this solves many random communication errors) Disable interrupts during read-modify-write I/O Reduce RAM consumption by eliminating unnecessary variables and trimming many to 8 bits Optimize both crc8 - table version moved to flash Delete very old, out-of-date readme file (info is here)

Added read_bytes() and write_bytes(), to reduce tedious loops.check_crc16() does all of calculation/checking work.Version 2.1: Arduino 1.0 compatibility, Paul Stoffregen Improve temperature example, Paul Stoffregen DS250x_PROM example, Guillermo Lovato PIC32 (chipKit) compatibility, Jason Dangel, dangel.jason AT Improvements from Glenn Trewitt: Version 2.2: Teensy 3.0 compatibility, Paul Stoffregen, Arduino Due compatibility, Fix DS18B20 example negative temperature Fix DS18B20 example's low res modes, Ken Butcher Improve reset timing, Mark Tillotson Add const qualifiers, Bertrik Sikken Add initial value input to crc16, Bertrik Sikken Add target_search() function, Scott Roberts If anyone is interested in more actively maintaining OneWire, please contact Paul.

Paul typically works on OneWire every 6 to 12 months. None of the known contributors were interested in maintaining OneWire. At the time, it was in need of many bug fixes, but had been abandoned the original author (Jim Studt). OneWire has been maintained by Paul Stoffregen ( since January 2010. The latest version of this library may be found at: Copyright (c) 2007, Jim Studt (original old version - many contributors since)

What is one wire library