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How to check if a library is compatible with Arduino Uno R4

You uses a library working with Arduino Uno R3, you want to know if it works with Arduino Uno R4 (Minima or WiFi). In theory:

• Libraries based on Arduino API are compatible without any modifications on UNO R4 boards.
• Libraries that rely on AVR-specific instructions are not compatible with the architecture of UNO R4 boards. Nonetheless, some libraries have been successfully ported through our early adopters program to ensure compatibility.

To determine if a library is compatible with Arduino Uno R4, you can follow these steps:

• Find the source code of the library, either on GitHub or on your computer where the code is installed.
• Locate the library.properties file within the library.
• Open the library.properties file and look for the architectures property.
• If the architectures property is set to * or renesas_uno, it indicates that the library is compatible with Arduino Uno R4.

Alternatively, you can try the following methods to check library compatibility:

• Contact the library creator: Reach out to the creator of the library and inquire directly about its compatibility with Arduino Uno R4.
• Inspect the library's source code: Review the library's source code line by line and check if it contains any AVR-specific code. If the code does not include AVR-specific instructions, it is likely compatible with Arduino Uno R4.

By following these steps and considering the suggested methods, you can determine whether a library is compatible with Arduino Uno R4.

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