What’s new in this release

• New custom G-code C810 for setting up the toolbar shortcuts
• Enhanced C104
• Editable multiple probing
• Increase step limit to 1999.9
• Screen backlight turns on by rotating the knob encoder
• Automatic recalculation of Mesh insets
• Make PID Plot optional to save flash memory (needs recompile)
• Editable Juntion Deviation (needs recompile with HAS_JUNCTION_DEVIATION)
• Editable Linear advance K parameter (needs recompile with LIN_ADVANCE)
• Host shutdown menu item (needs recompile with HOST_SHUTDOWN_MENU_ITEM enabled)
• Some bugs fixed
• Merged Bugfix 2.1.x branch

This firmware is based on Marlin, has been optimized and has enhancements for the Creality Ender 3 V2/S1 printer. This is an universal firmware that can be used in both RET6 and RCT6 SoC chips that have 256k or 512k Flash memory.

Versions

• Ender 3v2 MM: if you have the Ender 3v2 near to stock then use this version (Manual Mesh).
• Ender 3v2 BLT: use this version if you installed a CR/3D/BLTouch level sensor in the Ender 3v2.
• Ender 3S1: use this version if you have an Ender 3S1 printer

Firmware features

• Universal RCT6/RET6 Ender 3 V2/S1 Support
• DWIN / DACAI screens support
• Improved support for Manual Mesh and CR/3D/BLTouch
• User configurable power lost recovery enabler
• Manual and assisted bed tramming
• Tramming Wizard for BL/3D/CRTouch versions
• Long filename support with scroll
• Baby Z-Stepping
• Firmware Retract
• Advanced pause feature
• Configurable park-head position (default x=240 y=220)
• Filament change support
• Filament management (load/unload/park head) in prepare menu
• Print Flow on Motion and Tune menu
• Home axis after motor disabling
• Fastest Z feed rate
• Live move for all motors but extruder
• Support for S-curve Acceleration
• Reboot printer item on control menu
• Increase extruder feed rate limit to 150 for BMG users
• Allows to invert direction of the extruder on Motion menu
• Support for BTT Smart filament sensor
• Selectable runout filament sensor active state (LOW/HIGH/MOTION)
• Editable runout distance
• Support for µSD extensions
• PID popup with temperature plot
• Lock screen
• Editable physical dimensions
• Mesh viewer
• Custom pre-heat
• Enable/disable beeps sound
• New print g-code preview (use this guide)
• New print done screen
• Two decimal positions for axis coordinates value
• New Z-Offset wizard
• New PID settings menus
• PID moves the head to the center for more accuracy
• Leveling bed temperature linked to bed PID temperature
• Editable extrude minimum temperature
• Brightness settings on tune menu
• Turn off the backlight of the lcd in the tune menu
• New status line system, allows the scroll of large messages
• Home submenu with individual axis homing
• Enabled user setting for 115200 bauds (Creality Box compatibility)
• Head parking before recovery after power failure
• Offset icon changes to show leveling status
• Live end-stop diagnostic page
• Move bed to front after cancelling a print.
• Editable firmware retracts settings for Tune and filament settings menu
• Print Statistics page accessible from the Advanced Settings menu
• Toolbar with 11 configurable shortcuts actions.
• Support in source code of control menus for LED lights as the Neopixel

Manual mesh

• Assisted manual bed tramming
• Assisted manual mesh leveling menu
• Selectable mesh points from 2×2 to 9×9
• Mesh viewer
• Persistent Z-offset
• Move Z to 0 and disable motors option
• Mesh editor for fine tuning

CR/3D/BLTouch

• Safe Probe Z-Homing
• Bed auto level
• High speed probe
• Retry bed level on error
• Mesh viewer
• Assisted tramming
• Selectable mesh points from 2×2 to 9×9
• Allows the user to cancel an auto leveling process
• Increase Max Probe Offset and Probing Margin to 60 mm
• M48 Probe Test to Probe Settings menu
• Probe Stow/Deploy in Probe Settings menu
• Option to disable HS mode for better compatibility with CRTouch
• Option to change the Z Probe feed rate
• Configurable Bed auto leveling temperature
• Mesh editor for fine tuning
• Automatic maximize leveling area
• Automatic center leveling area

G-Codes enhanced support

• Filament Load Unload G-codes (M701/M702)
• Support for M600 filament change
• Support for G-code M117 messages
• Enable M575 change baud rate by G-code
• Extended M75 with filename support, use M75 {{ event.name }} in g-code script
• Enable ARC and ‚P‘ parameter to specify complete circles (G2/G3)
• G35 support
• M155 Geometry report
• Native support of marlin brightness and M256 g-code

Support for special nonstandard custom C G-Codes

• Implemented C11 En Rn Gn Bn gcode for colorize UI elements
• C108 to cancel screens waiting for user simple confirmation
• C29 F### B### L### R### N# T# Mesh insets, amount of grid points and bed temperature of the mesh leveling
• C100 X### Y### to setup minimum limits
• C101 X### Y### z### to setup maximum limits
• C102 X### Y### to setup bed size
• C104 U1 T### to unlock the hotend maximum temperature to ###°C (CAUTION)
• C115 Shows ProUI details
• C125 X### Y### z### to setup the park position
• C412 M# set run-out sensor active state (M0:LOW, M1:HIGH, M2:MOTION)
• C510 to lock/unlock the screen (C510 U1 to unlock)
• C562 E# to invert the Extruder (E1 to invert)
• C851 S#### set probe Z feed rate

Advanced settings menu

• Advanced mesh leveling editing features
• Probe offsets menu (BLTouch version)
• Customizable park-head position
• Customizable bed size and z heigh up to 999 x 999 x 999
• Launch PID for nozzle and bed with graphical feedback
• Filament run-out sensor with active state setup (LOW/HIGH)
• Filament load and unload lengths menu items in run-out menu
• Power-loss recovery enable/disable option
• LCD Brightness control
• Select Color Sub Menu
• Beep/Sound enable/disable option
• Selectable mesh point (BLTouch version)
• Lock screen
• End-stop diagnostics

Special Octoprint / Host print support

• High speed (250000 baud) serial communication
• In screen control of host printing (M73, M75-M77)
• Display messages on status line (M117)
• Color change of UI elements for visual status report (C11)
• Binary file transfer for remote firmware upgrade
• List binary (.bin) files (M20) for flash firmware support with BFT
• Arc Welder Octoprint plugin support
• EEPROM Editor Octoprint plugin support
• Host action commands for filament runout
• Emergency Parser active
• Advanced OK

Display enhancements

• Extended DWIN library
• Enhanced status messages
• Improved status bar with temperature, flow, fan, z-offset and xyz positions
• PID auto tune progress on display with plot
• Leveling progress on display
• Boot screen for M997
• Transparent icons for better color theme adaptability
• New print g-code preview
• New print done screen