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Arduino library for the DHT22 humidity and temperature sensor
Home Page: http://goo.gl/uy1fV
This project forked from nethoncho/arduino-dht22
Arduino library for the DHT22 humidity and temperature sensor
Home Page: http://goo.gl/uy1fV
DHT22.cpp - DHT22 sensor library Developed by Ben Adams - 2011 Humidity and Temperature Sensor DHT22 info found at http://www.sparkfun.com/products/10167 The same sensor has also been spotted going by the names RHT22, AM2302 and RHT03 from a variety of vendors. It uses a non-standard 1-wire digital signalling protocol. To install this library for use with the Arduino IDE, copy it to the `libraries' folder and restart the IDE. For an example of how to use it, see File->Examples->DHT22->Serial . Version 0.5: 15-Jan-2012 by Craig Ringer Update to support Arduino 1.0 Make accessors inlineable so they can be optimised away Preserve original integer values from sensor and offer access to them Permit floating point support to be disalbed by defining DHT22_NO_FLOAT before including DHT22.h Version 0.4: 24-Jan-2011 by Ben Adams Added return code constants to keywords.txt Returns DHT_ERROR_CHECKSUM on check sum mismatch Version 0.3: 17-Jan-2011 by Ben Adams This version reads data Needs check sum code added at the end of readData Version 0.2: 16-Jan-2011 by Ben Adams Changed coding style to match other Arduino libraries. This version will not read data either! Version 0.1: 10-Jan-2011 by Ben Adams nethoncho AT gmail.com First Version is a skeleton. This version will not read data! Code adapted from the following sources: The Arduino OneWire lib http://sheepdogguides.com/arduino/ar3ne1humDHT11.htm
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