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Serial port mode: use USB to serial port to connect PA9 and PA10 of the core board. Boards with version V1.3 and above have 3 buttons, reset button, BOOT0 button, and user buttons. No need for USB to serial port, no debugger, no computer driver, just a TYPE-C data cable to complete the firmware download.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.