Arduino for STM32

Thanks GonzoG, thanks ag123!
I think your explanations will be helpful enough. Yes, I needed to understand some "kindergarten" stuff and I will have to put it into practice soon. Thanks!

Thanks, fpiSTM!
I realized that my board uses Maple core... logically, if the processor declares itself as Maple Mini, but I didn't understand what conclusions I should read.
Thanks, ag123!
I appreciate your suggestion to install Arduino_Core_STM32, but it seems to me that the processor CPU (that ...

Thanks ag123!
Of course, I first tested the purchased board with the classic Blink sketch modified with Serial.print - it works correctly. Unfortunately, I still have to figure out how to navigate the jungle of library offers, installation and usage. What is what and where to put what ... I used ...

Thanks for the interested answer!
I'm sorry, but I have understand a lot of these terminology with ChatGPT help. I apologize for that.
1) What core - from your question I understand that it could be STM32, because the IDE has an STM32 board add-on installed, but when I marked the board Maple Mini ...

Hi!
I have been using the Arduino platform for many years, but this is my first time with STM32. After several days of torment (yes, also with ChatGPT support) I decided to ask for help. I have a STM32F103C8T6 board (identified as MapleMini in PC) and I have tried to use I2C - every time the board ...