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1.0.0
First Boards Manager release of the CH32H41x Arduino core.
Add this URL under File > Preferences > Additional boards manager URLs, then install CH32H41x Boards:
https://raw.githubusercontent.com/Community-PIO-CH32V/ArduinoCore-CH32H4/main/package_ch32h4_index.json
The compiler, WCH's OpenOCD, wlink and — on Windows — a Python for the two prebuild hooks all install with it. Nothing needs to be on PATH beforehand. On Linux and macOS the hooks use python3 from PATH, as arduino-pico does.
Assets
ch32h4-1.0.0.zip— the platform, built fromgit ls-files --recurse-submodulesso that all five submodules are present. GitHub's own source archives below contain none of them and will not build.python3-3.11.9-embed-amd64-rooted.zip— python.org's Windows embeddable build, repacked under a single top-level directory because arduino-cli refuses an archive without one.
Verified by installing into a clean arduino-cli data directory and compiling with PATH cut down to system32 — no Python and no compiler available — then flashing the result, which boots at 400 MHz off HSE with USB up.