Blue Pill is a STM32F103C8T6 chip based ARM Cortex M3 minimum system development board. This board Consist of most basic MCU circuit, 8MHz and 32768Hz crystal circuit onboard, micro USB based power supply circuit. The core board is divided into two rows leads to all the I/O ports. SWD simulation debug download interface, simple and convenient, debugging speed. Micro USB interface for USB communication and power supply. This Core board comes with 64K FLASH and 20K SRAM. This board is a generic design of famous Blue pill board.