Hey, let me know if this is not the right place to ask this.

I am trying to add RetroSpy to my Arduino Uno board, and encountering a compilation issue when trying to upload it. I have changed anything other than un-commenting the #define MODE_SNES line.

The issue I'm seeing is that the Arduino IDE is complaining about a in almost every single file included by the firmware file, on line 1 which is just comment slashes for all of these files.

I was reading that this is complaining about hidden unicode characters, but removing the line and adding back in the slashes in the IDE doesn't remove the error. I'm thinking that the IDE isn't able to compile the code in the other files, but I have no idea how to fix that.

I do have experience with coding with Java and JS, but have never worked in C/C#/C++ or with arduinos. Any help would be appreciated!

I don't have experience with Arduino specifically, but yeah, that error does sound like some weird unicode character in the code. According to my quick Google search, a \357 is the letter ť. Did you check if your source code contains that anywhere?

Another possibility is that your source file has a wrong encoding somehow. Like, maybe the compiler expects UTF-8, but your source file is ANSI-encoded or something like that, so the compiler interprets some character incorrectly. You can check your source file's encoding by opening it in a text editor like Notepad++, for example.

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Thanks for the reply! That's all similar to the avenues I was chasing. I did get past this issue eventually by using the Arduino WebIDE, which worked. So something is wrong with my local setup. But I don't really care to sped the time to hunt it down since it seems like the WebIDE works just fine.