Blue Pill development board Air32F103CBT6 Core board 96K RAM 128K Flash compatible with STM32F103 Fully compatible with STM32 Blue Pill, peripheral package pin definition is completely consistent, mainstream development tools and software libraries are all universal The development board is daplink firmware by default (BluePill development board has no firmware by default). The firmware supports external control, debugging and downloading, and supports USB flash drive mode burning and virtual serial port. The corresponding relationship between pins is as follows: PB13 SWD_CLK (daplink firmware external control) PB14 SWD_DIO (daplink Firmware External control) PB0 RST reset (daplink firmware external control) PA2 TX of the virtual serial port PA3 RX of the virtual serial port PB13 connects to SWDCLK of the device being debugged, PB14 connects to SWDIO of the device being debugged, and PB0 connects to reset of the device being debugged: The green light in the middle indicates communication with the connected device. When plugged into the computer, it displays a USB flash drive called daplink, a COM port, and a portable device called daplink. Select CMSIS DAP as the debugger in keil or other development software. Currently, the following development environments are supported: KEIL MDK IAR PyOCD Other software that supports the CMSIS-DAP protocol _x000D_