Michel2/DHT-sensor-library
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152 Commits 3 Branches 26 Tags
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64 Commits
Author SHA1 Message Date
piclaw 99e90c2698 Fix clang-format CI: add .clang-format, update workflow, format code 2026-02-05 09:32:02 -05:00
Ondřej Sluka 2470b8a3a1 Fix infinite loop on STM32F103 
When trying to read temperature from a DHT11 when the sensor was
disconnected, the program would encounter an infinite loop in
DHT::expectPulse, because count would keep overflowing.
 2022-06-25 19:46:56 +02:00
Limor "Ladyada" FriedandGitHub 8de033bae1 Merge pull request #159 from Rotzbua/patch-1 
Fix compiler warning unused parameter...
 2020-05-21 12:16:14 -04:00
RotzbuaandGitHub a7157aa586 Fix compiler warning unused parameter... 
...'count' [-Wunused-parameter]
 2020-05-21 18:02:10 +02:00
RotzbuaandGitHub d0a1035985 Fix compiler warning: comparison between signed... 
... and unsigned integer expressions [-Wsign-compare]
 2020-05-21 14:29:08 +02:00
RotzbuaandGitHub 7528a843dd Fix compiler warning: comparison between signed... 
... and unsigned integer expressions [-Wsign-compare]
 2020-05-21 14:21:00 +02:00
RotzbuaandGitHub 5ce3bce49c Fix compiler warning: comparison between signed... 
... and unsigned integer expressions [-Wsign-compare]
 2020-05-21 06:28:03 +02:00
RotzbuaandGitHub 44a80e01e6 Fix compiler warning unused parameter... 
...'count' [-Wunused-parameter]
 2020-05-21 06:19:11 +02:00
siddacious 5d60b0d3f0 actionified, formatted and doxy'd 2020-04-08 11:37:24 -07:00
Jan Hoffmann dd455428a0 documented DHT 2019-07-04 17:06:42 +02:00
matthiasdannerandGitHub 6332774b18 removed double conversion to Celsius 2019-04-17 20:01:26 +02:00
Phillip Burgess f566d58f47 Move ESP8266 yield() out of InterruptLock 2019-02-18 10:20:28 -08:00
Phillip Burgess 7cec0cb06d Configurable pullup delay time, default 55 usec 2019-02-14 09:24:17 -08:00
Simon IJskes 8b9624479e removed '*' copy error. 2019-02-11 12:33:06 +01:00
Simon IJskes 57fe95c1be split off the DHT11 conversion, corrected the algorithm for temperatures below 0 degrees celsius. 2019-02-08 22:18:10 +01:00
Phillip Burgess d6488c1fbe Change initial HIGH delay, fix comments in examples 2019-01-28 17:05:54 -08:00
Phillip Burgess 01490aa8de Vary delay by sensor type a la PR #70 2019-01-11 17:24:16 -08:00
Phillip Burgess bdd2756ed1 Fix computeHeatIndex declaration, check F_CPU in expectPulse 2019-01-11 16:47:34 -08:00
Paint Your DragonandGitHub 07da1cd001 Merge pull request #91 from chelmi/master 
Fix for slower boards. Use uint16_t in expectPulse loop to increase sampling rate
 2019-01-11 16:41:47 -08:00
Paint Your DragonandGitHub b3b0b08d6d Merge pull request #115 from owenduffy/master 
Fix timing and pin mode change to comply with datasheet.
 2019-01-11 16:34:29 -08:00
Paint Your DragonandGitHub bf86a4068c Merge pull request #112 from SConaway/patch-1 
Read Temp and Humidity if not specified
 2019-01-11 16:33:11 -08:00
Phillip Burgess f8d3497fac "Better Debug Information" via Driver55 PR #110 2019-01-11 16:31:02 -08:00
Paint Your DragonandGitHub efcca31a7f Merge pull request #108 from qub1750ul/master 
Use bool instead of boolean
 2019-01-11 16:23:45 -08:00
Paint Your DragonandGitHub fa129747e8 Merge pull request #95 from fanthos/master 
Add support for DHT12.
 2019-01-11 16:22:00 -08:00
Paint Your DragonandGitHub dff65098bb Merge pull request #82 from adams13x13/patch-1 
Fixes #81 Distinguish "signal already there" from "timeout"
 2019-01-11 16:18:37 -08:00
Paint Your DragonandGitHub 73409c143c Merge pull request #76 from terryjmyers/patch-1 
Modified read speed
 2019-01-11 16:15:14 -08:00
Paint Your DragonandGitHub 5550a040c2 Merge pull request #61 from 7eggert/master 
Save 66 bytes by using integer arithmetric
 2019-01-11 16:05:29 -08:00
Paint Your DragonandGitHub dc71b006b6 Merge pull request #52 from Spacefish/master 
Use MIN_INTERVAL define instead of hardcoded value
 2019-01-11 16:02:07 -08:00
W12\owen b429942ce8 Fix timing and pin mode change to comply with datasheet. 2018-09-24 06:20:01 +10:00
Steven ConawayandGitHub 2dfa77993d Update DHT.cpp 2018-07-30 11:31:34 -07:00
Steven ConawayandGitHub 6b8b1ccdb9 Update DHT.cpp 2018-07-30 11:23:35 -07:00
Giuseppe Masino 3bba771f8c Changed boolean to bool 2018-06-27 19:18:17 +02:00
Boyi C a607a50475 Add support for DHT12. 
Change DHT11 temperature resolution to 0.1 instead of 1.
 2017-12-12 14:20:26 +08:00
Michel Metzger b07db5af21 Fix for slower boards. Use uint16_t in expectPulse loop to increase sampling rate and avoid bad readings. 
Tested on atmega328 @ 8MHz and Feather M0 @ 48MHz
 2017-11-02 22:53:50 -04:00
adams13x13andGitHub 761f4f4fb9 Fixes #81 "signal already there" != "timeout" 
If expectPulse(LOW) sees the port is already LOW (result == 0), this is not timeout!
 2017-09-02 20:15:19 +02:00
Terry J MyersandGitHub 16e61f1084 Modified read speed 
Reduced delay times from 250ms and 20ms to 1ms.  This was done in accordance with the datasheet.  E.G. no where does it say you need to wait 250ms or 20ms.  It does say to set the line high for a minimum of 1ms (the second delay).  This has been tested and is working in my of my projects
 2017-04-09 19:35:04 -04:00
Bodo Eggert 519393f42e Save 66 bytes by using integer arithmetric 2016-09-08 17:11:29 +02:00
Timo Witte cad6977ba8 fix initilization of _lastreadtime 2015-12-27 02:47:09 +01:00
Spacefish 53375d8d70 Use MIN_INTERVAL define instead of hardcoded value 2015-12-26 22:32:34 +01:00
JongHo Lim 89937d5d25 mod readHumidity(). using parameter 'force' 2015-11-29 22:27:43 +09:00
Tony DiCola 15020aa891 Fix #44 by conditionally excluding unused port and bitmask state on non-AVR platforms. 2015-10-12 21:30:01 -07:00
Tony DiCola ce3190f65c Switch back to integer division in array indexing. 2015-10-12 18:37:54 -07:00
J.M. Dana 5bc0a5c796 Divisions turned into multiplications 
As correctly stated by Mausy5043, the division is quite slow in most
microcontrollers, so I have replaced them with multiplications.
 2015-10-06 23:42:19 +01:00
J.M. Dana 51a8b814ac Divisions have been replaced by multiplications. 2015-10-03 13:42:09 +01:00
J.M. Dana 36fb16274b DHT::computeHeatIndex has been modified so it uses both Rothfusz and 
Steadman's equations. As a result, it allows a larger range of
temperatures and more accurate results for extreme conditions.
 2015-10-02 21:50:43 +01:00
Matthijs Kooijman f9c3f323e3 Use INPUT_PULLUP 
Previously, the mode was configured to INPUT and then written HIGH,
which works on AVR but isn't very portable. Instead, this uses the
INPUT_PULLUP pin mode (available since Arduino 1.0.1) which is portable.
 2015-07-24 21:44:41 +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