To Upload the code, before push the button to Load code in ARDUINO IDE, you must put the BluePill board in "native bootoader" mode. To active this mode, you have to change the jumpers positions: ...

STM32-Ethernet-Board This product is an STM32F103C8T6 based, arduino compatible, microcontroller development board. It also integrates an ENC28J60 ethernet interface. Since the board uses the ...