Known in the community as Blue Pill Search term on eBay/AliExpress STM32F103C8T6 Minimum System Development Board Introduction The Blue Pill is a popular board sold on eBay, AliExpress and the likes. It consists of an STM32F103C8T6 microcontroller. There are some variants of this board. Regarding the microcontroller, some recent board may supply a microcontroller from…