New version of PandaM4,onboard blower FAN

New version of PandaM4 available, add on board silent cooling blower FAN and external antenna.

With ESP32 as the MCU for 3D printer,not only fast MCU speed,large memory than all the STM32bit board,you can upload file, firmware over the air,there will be more possible.

Store:PandaM4 | Pandapi Print 3D (pandapi3d.com)

more detail:markniu/PandaZHU: 3D printer control board based on ESP32,support 8 Driver motors. (github.com)