Programming STM32F103 Blue Pill using USB Bootloader and PlatformIO - lostengineer.com
STM32 Bootloader, STM32F103C Programming using USB Port, STM32 LED Blinking, STM32 for beginners - YouTube
Amazon.com: [initeq] STM32 ARM STM32F103C8T6 Blue Pill Minimum System Development Board with ST-Link V2 USB Programmer (2-Pack + ST-Link V2) : Electronics
Having problem to make HID bootloaded 2.2 - Arduino for STM32