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Comment on Comu is a $6 tiny CH32V203 RISC-V development board that fits inside a USB port by Priyank Patil

['Debashis Das', 'Paisit Wongsongsarn', 'Priyank Patil'] Comments for CNX Software – Embedded Systems News 2026-08-10 00:00:00

While measuring just 13 x 9.4 mm (slightly smaller than a microSD card), the board still packs two white LEDs, four capacitive touch buttons, and six GPIOs exposed through test pads. It is designed for bare-metal programming, custom USB HID projects, and USB packet experimentation. On the software side, the Comu development board is designed for lightweight bare-metal C/C++ development and works well with the ch32fun project.

also comu board tiny development flash ch32v203 risc port touch

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