mirror of
https://github.com/RobTillaart/Arduino.git
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129 lines
3.5 KiB
Markdown
129 lines
3.5 KiB
Markdown
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[](https://github.com/marketplace/actions/arduino_ci)
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[](https://github.com/RobTillaart/DHTstable/actions/workflows/arduino-lint.yml)
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[](https://github.com/RobTillaart/DHTstable/actions/workflows/jsoncheck.yml)
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[](https://github.com/RobTillaart/DHTstable/issues)
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[](https://github.com/RobTillaart/DHTstable/blob/master/LICENSE)
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[](https://github.com/RobTillaart/DHTstable/releases)
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[](https://registry.platformio.org/libraries/robtillaart/DHTstable)
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# DHTStable
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Arduino Library for the DHT11 and DHT22 temperature and humidity sensor.
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## Description
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The DHTStable library is a "frozen" version of the DHTlib.
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This version is stable for both ARM and AVR.
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0.2.5 is a migration to its own repository.
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0.2.6 fixed URL to new repository
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0.2.7 getTemperature() and getHumidity() added
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added Arduino-CI + unit test.
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0.2.8 fix negative temperature
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0.2.9 fix URL in JSON file
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**breaking name**
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1.0.0 renamed the dht.h file to DHTStable.h to fix the incompatible flag
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See issue https://github.com/RobTillaart/DHTstable/issues/8
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Also made temperature and humidity private
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The latest developments for the DHT sensors are done in https://github.com/RobTillaart/DHTNEW
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which is also tested on an ESP32.
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There are some interface differences, these are relative small but can be time critical.
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It is advised to upgrade to the DHTNEW library if one needs the new functionality.
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## Interface
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```cpp
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#include "DHTStable.h"
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```
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#### Constructor
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- **dht()** Constructor
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#### Read functions per type
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- **int read11(uint8_t pin)**
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- **int read(uint8_t pin)**
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- **int read12(uint8_t pin)**
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- **int read21(uint8_t pin)**
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- **int read22(uint8_t pin)**
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- **int read33(uint8_t pin)**
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- **int read44(uint8_t pin)**
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- **int read2301(uint8_t pin)**
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- **int read2302(uint8_t pin)**
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- **int read2303(uint8_t pin)**
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- **int read2320(uint8_t pin)**
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- **int read2322(uint8_t pin)**
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- **float getHumidity()**
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- **float getTemperature()**
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#### Enable / disable interrupts
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- **bool getDisableIRQ()**
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- **void setDisableIRQ(bool b )**
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## Operational
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See examples.
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#### Voltage AM2301
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In a test an AM2301 had problems giving no humidity (99.9% overflow) when this
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DHTStable library was used with an ESP8266. (Reported by mail, no GH issue)
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After days of testing and thinking and more testing the cause was found.
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The AM2301 was powered by a 5V3 power supply which was apparently too high while having the
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data handshakes at 3V3.
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When the VCC voltage was lowered to 5V1 it appeared to work as it should.
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(Kudos to Viktor for finding the cause)
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## Future
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- no active development
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- follow bug fixes from DHTnew
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- on request.
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#### Must
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#### Should
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#### Could
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#### Wont
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- move some const int to .cpp file
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- improve unit test
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- add constants test
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## Support
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If you appreciate my libraries, you can support the development and maintenance.
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Improve the quality of the libraries by providing issues and Pull Requests, or
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donate through PayPal or GitHub sponsors.
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Thank you,
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