v4.2.1

New Features

• Enable Power Control (#47)
• Support Emergency Stop Button
• Support Rotary Module

Bug Fixes

• Fix: Turn off the laser when loss connection with Touchscreen. (#86)
• Fix: Fix FreeRTOS delays. (#45)
• Fix: Fix CNC Module spindle was not turned off if stop/finish working with Z distance from top is less than 30mm. (#51)

Improvement

• Optimize start position behavior of 3D Printing Calibration. (#30)
• Enable FPU for optimizing performance. (#48)
• Reduce latency while all rodata are out of 256kB of Flash. (#60)