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These are the new "Black Pill" boards featuring the F411 chip (this is the best version). look up "stm32duino blue pill". Also includes 4 20-pin female headers for soldering to 2.54mm (0.1") prototype board.
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.