2022-05-08 07:05:13 -04:00
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[](https://github.com/marketplace/actions/arduino_ci)
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[](https://github.com/RobTillaart/DHTINT/actions/workflows/arduino-lint.yml)
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[](https://github.com/RobTillaart/DHTINT/actions/workflows/jsoncheck.yml)
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2023-10-25 11:21:50 -04:00
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[](https://github.com/RobTillaart/DHTINT/issues)
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2022-05-08 07:05:13 -04:00
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[](https://github.com/RobTillaart/DHTINT/blob/master/LICENSE)
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[](https://github.com/RobTillaart/DHTINT/releases)
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2023-10-25 11:21:50 -04:00
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[](https://registry.platformio.org/libraries/robtillaart/DHTINT)
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2022-05-08 07:05:13 -04:00
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# DHTINT
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Arduino library for DHT sensors - integer only
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## Description
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This is an **experimental** integer only library,
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based upon - https://github.com/RobTillaart/DHTNew - version 0.4.12
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Goal is to reduce footprint by using integer math only.
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This way the lib becomes more usable for processors like the ATTINY 45 or 85.
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As the library only uses integer math it will not trigger the automatic including of
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the floating point math libraries.
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This will save additional memory unless other code uses floating point math.
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### Compare DHTINT versus DHTNEW
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Sketch: ..\example\dhtint_minimum.ino
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replaced DHTINT with DHTNEW
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| platform | library | sketch size | variables |
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|:--------:|:--------|------------:|----------:|
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| UNO | DHTNEW | 5730 | 341 |
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| UNO | DHTINT | 3978 | 321 |
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| | delta | 1752 | 20 |
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| | | | |
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| ESP32 | DHTNEW | 206730 | 13464 |
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| ESP32 | DHTINT | 206110 | 13456 |
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| | delta | 620 | 8 |
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Gain is most substantial for the UNO platform.
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2023-10-25 11:21:50 -04:00
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## Interface
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```cpp
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#include "dhtint.h"
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```
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To elaborate
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2022-05-12 09:07:38 -04:00
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### Raw data access
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To access the decimal part the following two functions are added.
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These give access to the bytes that are low level communicated.
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The user can decode these values to get the integer + decimal part.
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This can be used for efficient storage or transmission.
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- **uint16_t getRawTemperature()**
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- **uint16_t getRawHumidity()**
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Note these functions have no equivalent in the DHTNew library (yet).
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2022-05-16 14:05:48 -04:00
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### Integer offset
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To set the decimal part of the offset the following two functions are added.
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- **uint16_t setDecimalOffsetHumidity(int offset)**
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- **uint16_t setDecimalOffsetTemperature(int offset)**
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An offset of ```setDecimalOffsetTemperature(15);``` means +1.5 °C
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Note these functions have no equivalent in the DHTNew library (yet).
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2022-05-08 07:05:13 -04:00
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## Future
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2023-10-25 11:21:50 -04:00
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No active development.
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#### Must
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#### Should
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2022-05-08 07:05:13 -04:00
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- Keep in sync with DHTNEW.
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- Test more
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2023-10-25 11:21:50 -04:00
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#### Could
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#### Wont
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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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