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a48ea1ea29
+ replaced delay by delayMicroseconds() + removed dependency on F_CPU + added constructor + refactor
30 lines
1.2 KiB
Plaintext
30 lines
1.2 KiB
Plaintext
The DHT11, 21, 22, 33 and 44 are relative inexpensive sensors for measuring temperature and humidity.
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This library can be used for reading both values from these DHT sensors.
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The DHT11 only returns integers (e.g. 20) and does not support negative values.
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The others are quite similar and provide one decimal digit (e.g. 20.2)
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The hardware pins of the sensors and handshake are identical so ideal to combine in one lib.
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The library (0.1.13 version) is confirmed to work on:
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UNO (tested myself)
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2009 (tested myself)
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MEGA2560
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DUE
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attiny85 @8MHz
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Digistump Digix @ 84 MHz
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More information - http://playground.arduino.cc//Main/DHTLib -
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Notes:
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version 0.1.13 is the last stable version for both AVR and ARM
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version 0.1.14 and up are not compatible anymore with pre 1.0 Arduino
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version 0.1.14 and up have breaking changes wrt ARM based arduino's e.g DUE.
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version 0.1.15 is stable version for AVR only
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version 0.1.16 and 0.1.17 have breaking changes for DHT11
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version 0.1.18 works again for DHT11 (avr only)
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version 0.1.19 fixed masking bug DHT11 (avr only)
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version 0.1.20 Reduce footprint (34 bytes) by using int8_t as error codes. (thanks to chaveiro)
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version 0.1.21 replace delay with delayMicroseconds() + small fix (thanks to codingforfun)
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