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Arduino library for the Pololu QTR reflectance sensors
C++ Arduino
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Arduino Library for the Pololu QTR Reflectance Sensors

Version: 2.1.2
Release Date: 2015-12-03


This is a library for an Arduino or A-Star 32U4 controller that interfaces with the Pololu QTR reflectance sensors.

For documentation, please see the user’s guide for the library on Pololu’s website.

Version History

  • 2.1.2 (2015-12-03): Corrected readLine() behavior to work with multiple instances (thanks to Tandy Carmichael).
  • 2.1.1 (2014-05-02): Minor improvements to read() behavior and whitespace cleanup.
  • 2.1.0 (2013-04-18): Improved existing examples and added two new examples for printing raw values.
  • 2.0.2 (2013-04-17): Made constructors initialize pointers to avoid possible problems.
  • 2.0.1 (2012-09-13): Added a 200 us delay after emitter state changes to ensure sensors do not start being sampled before the LEDs turn on/off.
  • 2.0.0 (2012-02-14): Initial release of library on GitHub (with Arduino 1.0 compatibility).
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