https://www.wch-ic.com/downloads/file/397.html
https://www.wch-ic.com/downloads/CH32V002DS0_PDF.html
Github https://github.com/TianpeiLee
Arduino: https://github.com/openwch/board_manager_files/raw/main/package_ch32v_index.json
https://github.com/openwch/arduino_core_ch32
How to use
You can add this software package directly on the IDE through the Arduino Boards Manager.
Add the following link in the "Additional Boards Managers URLs" field:
https://github.com/openwch/board_manager_files/raw/main/package_ch32v_index.json
Then you can search for "wch" through the "board manager", find the installation package, and install it.
Essempi https://www.wch.cn/downloads/CH32V003EVT_ZIP.html
https://www.wch.cn/download/file?id=409 essempi
C:\MounRiver\MounRiver_Studio\Projects\CH32V003