The SDI12 library code is released under the GNU Lesser Public License (LGPL 2.1) -- See LICENSE-examples.md file for details. Example Arduino sketches are released under the BSD 3-Clause License -- ...

(Hint: there’s no Arduino-provided code involved; hardware registers and the __asm keyword show up.) If you learned embedded programming in an earlier era, this will probably seem glaringly obvious.

All the modules are powered with 5V from the Arduino. Below is the ... are uploaded with the appropriate code, we can check their functionality. As usual, for understanding the code, you can check out ...

I reworked that minimalistic version into a library and I added a number of Arduino examples to help you get started. Effort has been taken to keep the code, variables and function names compatible ...