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77 lines
2.7 KiB
Markdown
77 lines
2.7 KiB
Markdown
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[](https://github.com/marketplace/actions/arduino_ci)
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[](https://github.com/RobTillaart/DHT2pin/actions/workflows/arduino-lint.yml)
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[](https://github.com/RobTillaart/DHT2pin/actions/workflows/jsoncheck.yml)
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[](https://github.com/RobTillaart/DHT2pin/issues)
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[](https://github.com/RobTillaart/DHT2pin/blob/master/LICENSE)
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[](https://github.com/RobTillaart/DHT2pin/releases)
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[](https://registry.platformio.org/libraries/robtillaart/DHT2pin)
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# DHT2pin
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Arduino library for experimental 2 pin DHT library.
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## Credits & testing
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Maria Emanuella Moura Silva for testing and verifying this experimental
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code on a Galileo.
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## Description
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**NOTE: THIS LIB IS NOT TESTED EXTENSIVELY YET SO USE WITH CARE**
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This library is an **experimental** version of the DHT library that uses **two** data pins.
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One pin for all read actions and one pin for all write actions.
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This way one does not need to switch a pin between **INPUT** and **OUTPUT**.
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Note:
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It needs a diode between the input pin of the MCU and the data pin of the DHT sensor.
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The output pin of the MCU is directly connected to the data pin of the DHT sensor.
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This library was made after a request which also referred to the links below.
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https://web.archive.org/web/20150912065850/https://communities.intel.com/thread/53869
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https://web.archive.org/web/20180510215445/http://bigdinotech.com/tutorials/galileo-tutorials/using-1-wire-device-with-intel-galileo
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(there might be later versions)
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**NOTE: THIS LIB IS NOT TESTED EXTENSIVELY YET SO USE WITH CARE**
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## interface
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```cpp
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#include "DHT2pin.h"
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```
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- **DHT2pin(uint8_t rpin, uint8_t wpin)** constructor.
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- **void begin()** set pinModes correctly, must be called before read().
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- **int read11()** read a DHT11.
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- **int read()** read a DHT22 and equivalents.
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- **float humidity()** get last humidity read.
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- **float temperature()** get last temperature read.
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## Operation
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See example
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## Future
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- no active development planned
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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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