Hi.
What code exactly are you running?
What does your platformio.ini file look like?
What is exactly the error that you get?
Regards,
Sara

Hi Sara,
i already found the problem. One way or another the call for the arduino libary failed.
Wiht the inclusion of ARduino.h it worked
so you can close the issue

I’ll mark this issue as resolved. If you need further help, you just need to open a new question in our forum.
Regards,
Sara