2017-07-27 09:43:45 -04:00
|
|
|
# DHT Library
|
|
|
|
|
|
|
|
|
|
## Description
|
|
|
|
|
|
2015-03-01 05:53:47 -05:00
|
|
|
The DHT11, 21, 22, 33 and 44 are relative inexpensive sensors for measuring temperature and humidity.
|
2014-02-10 12:56:10 -05:00
|
|
|
|
2015-03-01 05:53:47 -05:00
|
|
|
This library can be used for reading both values from these DHT sensors.
|
2014-06-26 14:48:20 -04:00
|
|
|
The DHT11 only returns integers (e.g. 20) and does not support negative values.
|
|
|
|
|
The others are quite similar and provide one decimal digit (e.g. 20.2)
|
2014-02-10 12:56:10 -05:00
|
|
|
The hardware pins of the sensors and handshake are identical so ideal to combine in one lib.
|
|
|
|
|
|
2014-11-16 08:25:44 -05:00
|
|
|
The library (0.1.13 version) is confirmed to work on:
|
2014-02-10 12:56:10 -05:00
|
|
|
|
2017-07-27 09:43:45 -04:00
|
|
|
*UNO (tested myself)
|
|
|
|
|
*2009 (tested myself)
|
|
|
|
|
*MEGA2560
|
|
|
|
|
*DUE
|
|
|
|
|
*attiny85 @8MHz
|
|
|
|
|
*Digistump Digix @ 84 MHz
|
|
|
|
|
|
|
|
|
|
Later 0.1.xx versions are optimized for AVR.
|
2014-02-10 12:56:10 -05:00
|
|
|
|
2014-10-15 02:00:59 -04:00
|
|
|
More information - http://playground.arduino.cc//Main/DHTLib -
|
|
|
|
|
|
2017-07-27 09:43:45 -04:00
|
|
|
## Operational
|
|
|
|
|
|
|
|
|
|
TODO pin description
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
## Versions:
|
|
|
|
|
|
|
|
|
|
==> See DHTStable library for latest stable version for all platforms.
|
|
|
|
|
|
|
|
|
|
* version 0.1.13 is the last stable version for both AVR and ARM
|
|
|
|
|
* version 0.1.14 and up are not compatible anymore with pre 1.0 Arduino
|
|
|
|
|
* version 0.1.14 and up have breaking changes wrt ARM based arduino's e.g DUE.
|
|
|
|
|
* version 0.1.15 is stable version for AVR only
|
|
|
|
|
* version 0.1.16 and 0.1.17 have breaking changes for DHT11
|
|
|
|
|
* version 0.1.18 works again for DHT11 (avr only)
|
|
|
|
|
* version 0.1.19 fixed masking bug DHT11 (avr only)
|
|
|
|
|
* version 0.1.20 Reduce footprint (34 bytes) by using int8_t as error codes. (thanks to chaveiro)
|
|
|
|
|
* version 0.1.21 replace delay with delayMicroseconds() + small fix (thanks to codingforfun)
|
|
|
|
|
* version 0.1.22 undo delayMicroseconds() for wakeups larger than 8
|
|
|
|
|
* version 0.1.23 FIX https://github.com/RobTillaart/Arduino/issues/31
|
|
|
|
|
* version 0.1.24 FIX https://github.com/RobTillaart/Arduino/issues/33
|
2017-09-20 08:47:53 -04:00
|
|
|
* version 0.1.25 FIX https://github.com/RobTillaart/Arduino/issues/80
|
2017-12-12 14:58:58 -05:00
|
|
|
* version 0.1.26 Explicit support for AM23XX series and DHT12
|
