In this tutorial, I will show you how to upload a USB Bootloader on the STM32F103C8T6 Blue Pill board. Using the STM32F103C8T6 USB Bootloader, you can easily program the Blue Pill Board just by using the on-board USB port without needing any external hardware. Important Note: I highly recommend you to go through the “GETTING … Continue reading How to Upload STM32F103C8T6 USB Bootloader? Program STM32 Blue Pill via USB