C2 Build for March
MARCH 2026
Version: 2.1.3h-3-C2
Continually updating with Marlin bugfix-2.1.x
⬂ List of recent updates ⬃
What's new in this release
⍟ Firmware Selector ⍟
Tip
You can use the Firmware Selector to help choose which file to download.
How to install the firmware
To update the firmware, choose the file ending in .bin and place it in your SD card:
(You may need to rename the file if reinstalling or if it doesn't flash the first time)- For an Aquila board, put it inside a folder named "firmware"
- For a Creality board, put it in the root folder of the drive
Or unless otherwise specified
⬇️Click to expand for detailed informationℹ️
This is a universal firmware that has been optimized and enhanced for both the Voxelab Aquila and Creality Ender-3 V2/S1.
This particular build release is for the 128x64 monochrome LCD of Voxelab Aquila C2.
You can also use this on a Creality brand printer.
- Aquila Build Voxelab Aquila S3/X3 - use _IND (Induction Probe)
- HC32 Build
- Ender-3 V2/S1 Build
🆕Recent Updates
EDITABLE_HOMING_FEEDRATEis now available in most, if not all, builds- If you have a TFT or other display, you can request firmware *.bin files to be made, or compile your own
- BIQU MicroProbe V2.0 is now supported with _BMP prefix
- Creality Spider Speedy Ceramic Hotend is now supported with _SPDY5 prefix
📚Versions
- These are the configurations offered:
Bed Leveling Options
- [ _Default-NP ]: Use if you have a near stock machine Default No Probe
- [ _MM ]: Create a bed mesh without an auto bed probe Manual Mesh Bed Leveling
- [ _BLT ]: Use if you have a CR/3D/BL-Touch level sensor installed. Bilinear Auto Bed Leveling
- [ _UBL ]: Similar to both MM and BLT - with more options. Recommended over BLT Unified Bed Leveling
Special Versions
- (List of file prefixes and suffixes)
- LCD Displays
- [ C2- ]
| Monochrome 128x64 LCD | (Used in Aquila C2 and original Ender-3/CR-10)
This has NO ProUI capabilities
- Features
- [ _SPRT13 ]
| Sprite Extruder | (Uses thermistor # 13) - [ _SPDY5 ]
| Spider Speedy Ceramic Hotend | (Uses thermistor # 5) - [ _IND ]
| Inductive Sensor | (Probe used on X3/S2 models) - [ _BMP ]
| BIQU MicroProbe V2.0 | (Alternative to CR/3D/BL/-Touch)
Use ONLY this firmware with _BMP if you DO have this probe
- Options
- [ -IS ]
| Input Shaping | (Similar to Linear Advance)
Use ONLY if you mean to do the initial calibration✶
- [ -MPC ]
| MPC Autotune | (Replaces PID for hotend)
Prints will be effected regardless. May require a special breakout board or test prints to calibrate.
See Related Information below
UBL Information
Binaries with UBL in their filename are similar to the bilinear leveling of BLT, but with extra features to provide users with more control and information. There are multiple guides about UBL, it's recommend reading about it before using this type of leveling system.
- https://all3dp.com/2/marlin-ubl-unified-bed-levelin-simply-explained/
- https://www.3dmakerengineering.com/blogs/3d-printing/unified-bed-leveling-marlin
- https://hackaday.com/2022/01/14/3d-printering-getting-started-with-universal-bed-leveling/
Related Information
- All firmware version types have Linear Advance enabled
- Linear Advance - M900
- Input Shaping is enabled with files ending with "-IS"
- Input Shaping - M593
How to calibrate Input Shaping without extra hardware
Teaching Tech - Input Shaping: Step by Step guide
- MPC is enabled in firmware files containing "-MPC"
- Model Predictive Temperature Control
- MPC has proven to be a better algorithm for keeping the nozzle temperature stable, and is also very useful for high power heaters. It does take some getting used to how it works if you are unfamiliar with it. It's recommended for advanced users, so stick to the default PID versions, especially if your printer is relatively stock
This shows the two types of meshviewer as an example;
the newer colorful one has a more rainbow like characteristic:
Select Color Menu
Octoprint bed visualizer support
🔍More info on the 🌐Wiki pages
📋Requirements
Compatible mainboards with the following chips:✶Some versions may not fit into certain chip types
RC: 256kbRE: 512kb
- N32F103RCT6 / N32G455REL7
- HC32F460KCTA - HC32F460xCxx
- Creality | V4.2.2 / V4.2.7
STM32F103RET6
❓ The follow may apply to you if the mainboard chip supports 256KB max
Note ➀: Due to lack of flash memory space in the Aquila's GD32/N32|F103RCT6,
some features had to be disabled in the ProUI of UBL and BLT versions,
including, but not limited to:
- Configuration.h
-----------------------------
HOST_KEEPALIVE_FEATURE- Sends a busy status message to the host
PREHEAT_2_LABEL- 'ABS'
PREHEAT_3_LABEL- 'Warmup'
G26_MESH_VALIDATION- G26
NOZZLE_CLEAN_FEATURE- G12 P<#> S<#> T<#>
HAS_LOCKSCREEN- Simple lockscreen
ACTIVATE_MESH_ITEM- Active Mesh Leveling menu option
- Configuration_adv.h
-----------------------------
POWER_LOSS_RECOVERY- Continue Print after Power-Loss
M114_DETAIL- Use 'M114' for details to check planner calculations
CANCEL_OBJECTS- Use 'M486' to allow Marlin to skip objects
AUTO_REPORT_POSITION- M154 S<seconds>
- >
EXTENDED_CAPABILITIES_REPORTM115_GEOMETRY_REPORT- 'M115' outputs Firmware Capabilities (enabled features)
REALTIME_REPORTING_COMMANDS- Report position and state of the machine
Note ➁: The latest releases are promoting UBL versions over ABL (BLT - BL Touch), but ABL/BLT versions will be available. MPC autotune is available for the hot-end as a replacement to PID autotune.
Compatible LCD Screens:
You will not be able to use the Professional User Interface without the specific LCD screen.
You may modify your printer to meet these requirements.
Even though firmware is available for the legacy monochrome screens, you can use the most current Marlin source code instead.
- A DWIN color display with encoder knob DACAI, TJC, or SYNWIT displays may be used
- The following touchscreen models are not supported by ProUI:
- Aquila Pro / D1
- Ender-3 S1 Pro
You can try the Firmware Selector if you need help choosing the right firmware for your printer.
