• supports HDC1080
• supports HDC1000, HDC1008, HDC1010 and HDC1050 (untested)
• blocking and non-blocking mode
• multiple I2C bus support
• heater support
• convenience method to heat the sensor for a specified duration
• serial ID support
• CPU deep sleep support
• tested with SAMD21 MCU
• test build for ATmega 328P, ESP8266 and ESP32 MCU

1. Motivation
2. Results
3. Documentation
4. Examples
5. Contributing
6. Licenses and Credits

There are several Arduino libraries available for the HDC10XX sensors, but most of them share at least one of the following drawbacks:

• support for non-blocking usage missing
• build-in delays
• sparse implementation of device features
• not all HDC10XX variants supported
• GPL license

In non-blocking mode with 11 bit resolution it is possible to perform an acquisition cycle for humidity and temperature in about 10 ms with the CPU being involved for less than 1 ms (tested with a SAMD21 MCU).

Freeing up the CPU for about 9 ms compared to blocking mode does not sound like much, but even with a CPU running at 8 MHz this typically equates to significantly more than 50.000 CPU instructions.

See method description in the header file.

Examples for blocking and non-blocking use can be found in the examples subdirectory.

Contributors are welcome. Please create a merge request if you want to fix a bug or add a feature.

Copyright (c) 2024 Jens B.

This library depends on the Arduino platform and the Arduino Wire library.

The code was edited with Visual Studio Code.

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