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Pill blue board development datasheet data Pill pcb easyeda Pill blue pinout stm32 usb board programming using bootloader platformio arduino bluepill schematic spi program pins maple arm jpralves project
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STM32F103C8T6 - Blue Pill Development Board
Programming STM32F103 Blue Pill using USB Bootloader and PlatformIO
OnStep STM32 Blue Pill copy copy - EasyEDA
STM32F103 «Blue Pill» modified board - EasyEDA