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Si unit types for C++
"This library provides implementations to work with the SI unit system. Units can be converted and combined as needed. If any type is missing is is easy to just write your own based on the unit_t template."
Maintainer: Noa Sakurajin
This library is compatible with all architectures so you should be able to use it on all the Arduino boards.
To use this library, open the Library Manager in the Arduino IDE and install it from there.