Matthijs Kooijman
45a20da301
Shrink DHT::data to 5 bytes
...
There's only 5 bytes of data being transferred (2x2 bytes of data, 1
byte checksum), so no need to keep a useless byte.
2015-07-24 21:43:52 +02:00
Matthijs Kooijman
5973929e63
Remove the firstreading variable
...
By cleverly setting _lastreadtime in begin() to make sure that it looks
like the last read was alrady 2000 ms ago, even on startup when millis()
still returns 0, there is no longer a need to keep a separate
firstreading variable, saving a byte of memory and a bit of code.
2015-07-24 21:42:58 +02:00
Matthijs Kooijman
f1b79028ea
Clean up two-second interval check
...
There was some handling of millis() overflow that is not needed.
Standard unsigned subtraction and wraparound already works as expected,
so this extra check can be removed (it even hurts, since it introduces 2
seconds after a wraparound where no new data will be read, even if it
could otherwise happen).
Also, this prevents calling millis() a second time, since its value is
already known.
2015-07-24 21:41:19 +02:00
Matthijs Kooijman
04905bc5cd
Add force parameter to read methods
...
This allows forcing a read, even if the previous read was less than 2
seconds ago. This is useful in cases where the millis() timer is not
reliable, such as when sleeping. In this case, it is up to the caller to
ensure that at least 2 seconds elapse between calls with force set to
true.
2015-07-24 21:40:22 +02:00
Tony DiCola
5cd78aead6
Fix merge conflict with interrupt disable lock.
2015-07-22 12:22:35 -07:00
Tony DiCola
85d85170bd
Fix #37 by optimizing pulse read to use direct port access on AVR, stops checksum failures from missed signals.
2015-07-22 12:13:56 -07:00
Tony DiCola
9419315c50
Merge pull request #36 from Zirientis/master
...
Cause interrupts to be reenabled if a timeout occurs while waiting for the sensor
2015-07-01 22:16:10 -07:00
Zirientis
a2208eb813
Cause interrupts to be reenabled if a timeout occurs while waiting for the sensor.
2015-07-01 17:58:17 -07:00
Tony DiCola
a1393fc0ff
Merge branch 'MyIgel-master'
2015-06-26 15:56:28 -07:00
Tony DiCola
ef9590ad96
Fix merge conflicts, make compute heat index default to Fahrenheit to not break old code that assumes default is Fahrenheit.
2015-06-26 15:56:04 -07:00
Tony DiCola
b6925ee001
Merge branch 'dynamic_timing'
2015-06-26 15:17:28 -07:00
Tony DiCola
729895339c
Integrate keywords.txt from pull #31
2015-06-26 15:15:45 -07:00
Tony DiCola
9d7a9da8ae
Refactor algorithm to dynamically adjust to faster/slower processors. Fix #35 #30 .
2015-06-26 15:14:17 -07:00
Tony DiCola
a67e1a7e06
Automatic library.properties generation.
2015-03-31 12:09:43 -07:00
Igor Scheller
25942ac8b9
Added support for Celsius in computeHeatIndex
2014-11-01 12:27:16 +01:00
Tony DiCola
fcd865b3bc
Update example to note cycle threshold parameter for Arduino Due.
2014-07-26 13:58:45 -07:00
Tony DiCola
7f7425f11e
Resolve #24 by adding convert F to C function.
2014-07-25 19:34:35 -07:00
Tony DiCola
f2a48d6267
Resolve issue #20 by moving delay after 2 second read check to make read return quickly.
2014-06-02 13:41:12 -07:00
Tony DiCola
9611395a77
Switch to use noInterrupts and interrupts function. make read() public. This resolves pull #15 .
2014-06-02 13:13:50 -07:00
Tony DiCola
ce05c3536c
Remove serial.print from library and update example error handling. Resolves issue #11 and #13 .
2014-06-02 13:03:27 -07:00
Tony DiCola
ffac2f15b7
Update example to show temp in Fahrenheit and add computeHeatIndex function to resolve issue #9 .
2014-06-02 12:54:54 -07:00
Tony DiCola
633eb08654
Change example extension from .pde to .ino.
2014-06-02 12:36:44 -07:00
Limor "Ladyada" Fried
26e2bc1d79
Merge pull request #8 from soerup/master
...
Support for non 16 MHz devices by adding extra parameter to constructor
2013-01-02 07:58:47 -08:00
Lars Kirkeskov Sørup
ad73fab623
Support for non 16mhz devices
...
Added constructor parameter to allow for different timing needs. It has
the a default value of 6 which is the original value, so it should be
backwards compatible
2012-12-29 19:14:51 +01:00
Limor "Ladyada" Fried
71ee113a7b
Merge pull request #4 from Jearil/master
...
Adding #ifndef DHT_H to header file
2012-08-26 18:42:37 -07:00
Colin Miller
fca71323bd
Prevent dht.h being imported multiple times
...
Added a basic #ifndef DHT_H to the dht.h file so that if you have a
larger program and want to access the sensor from a different file, you
don't import it twice.
2012-07-26 21:39:47 -07:00
Paint Your Dragon
53e6481231
Default argument for compatibility with old sketches
2012-02-23 11:43:30 -08:00
Paint Your Dragon
14d816819c
Merge pull request #3 from leprasmurf/master
...
Convert Celcius to Fahrenheit.
2012-02-23 11:27:41 -08:00
leprasmurf
a3d1dc78bf
Added option for converting to Fahrenheit
2012-02-22 22:26:16 -05:00
leprasmurf
8f46f27b66
Modified readTemperature() prototype. Added prototype for new function.
2012-02-22 22:20:19 -05:00
Paint Your Dragon
cffd745009
Arduino 1.0 compliant
2011-12-02 19:50:02 -08:00
Ladyada
31b6b45352
clarified the pullup
2011-06-22 16:28:22 -04:00
Ladyada
b05219ab42
added mini readme
2011-06-22 16:12:33 -04:00
Ladyada
53f985c6b4
Example sketch
2011-06-22 16:09:13 -04:00
Ladyada
57ac62dab7
fully tested working DHT11/21/22 with built in '2 second' timer
2011-06-22 13:11:06 -04:00
Ladyada
7ecd3141a8
touch commit
2011-06-20 19:47:50 -04:00
