RFID.MFRC522/.github/CONTRIBUTING.md

Code style

1. Please use fixed integers, see stdint.h_. Why? This library is compatible to different boards which use different architectures (8bit vs 32bit). So unfixed int has different sizes on different environments and may cause unpredictable behaviour.

2. If possible: use advantages of c++11, e.g. constexpr.

3. Add documentation to every new function or parameter. Add documentation to most steps in your source code.