HIGHLIGHTS:
· Reserved I2C, SPI and WIFI interfaces to facilitate DIY.
· Reserved the closed-loop drive interface to save the trouble of plug-in switching modules.
· Used double z-axis ports to save the trouble of the external drive expansion module.
· More fan interfaces: 1-way NC fan, 3-way Frequent fans.
· An external DC5V power module to power the TFT screen, BL touch, and Neopixel more effectively.
· RGB light bar supporting the Neopixel scheme.
· The thermistor interface shall be protected by a capacitor and a varistor to enhance the resistance of the interface.