Unified 2 Firmware for SKR E3 Mini V1/V1.2/V2.0 Boards

4 reviews|2 answered questions

This is our Unified 2 Firmware for the BigTreeTech SKR E3 Mini V1/V1.2/V2.0 boards. This firmware is tested by us on these actual boards and works. Your purchase helps fund the development of the firmware for this board and others.

Currently the Unified 2 Firmware latest release is: 2.80.

Printer Models supported:

  • Ender 3
  • Ender 3 Pro
  • Ender 3 MAX
  • Ender 5
  • Ender 5 Pro
  • Ender 5 Plus (Requires LCD Kit)
  • CR-10/CR-10S
  • CR-10 Mini/CR-10S Mini
  • CR-10 S4/CR-10S S4
  • CR-10 S5/CR-10S S5


2 users have this item in wishlist
BTT SKR E3 Mini V1/V1.2/V2 Boards

The firmware does not come with technical support. If you wish to add our standard email technical support you can add it here. Support applies to the control board install, includes firmware compiles by TH3D Support Staff, and included firmware features.


Firmware Directions

Directions for the firmware are located in our help center. It is sorted by brand and model. You can access the Help Center here: Unified 2 Help Center

Firmware Versions/Changelog

Currently the Unified 2 Firmware latest release is: 2.80.

You can review the changelog for all Unified 2 Firmware releases on our GitHub release page here: https://github.com/th3dstudio/UnifiedFirmware/releases

Video Guide

Firmware Features

Enhanced Performance – TH3D Studio Unified 2 Firmware is designed to optimize the performance of 3D printers, with features like Input Shaping and Linear Advance delivering smoother movements, reduced vibrations, and improved overall print quality. It incorporates advanced motion planning algorithms to enhance the precision and accuracy of your prints when tuned to your machine.

Easy Installation – The firmware is specifically engineered to be user-friendly and straightforward to install. TH3D Studio provides comprehensive installation guides and support to ensure a hassle-free setup process for both beginners and experienced users.

Advanced Bed Leveling – Our Unified 2 Firmware supports our EZABL Bed leveling kits as well as BLTouch and CRTouch Sensors. Don’t have a sensor? We also have Manual Mesh Leveling added as well so you can use mesh bed leveling without a sensor.

Customizability – Unified 2 Firmware offers extensive customization options, allowing users to tailor their 3D printing experience to their specific needs. It provides a wide range of configuration settings, enabling fine-tuning of print parameters, such as acceleration, jerk control, steps/mm, motor direction, PID tuning, and more.

Safety Features – TH3D Studio prioritizes safety and includes multiple features in Unified 2 Firmware to protect your printer and prevent potential issues. These features include thermal runaway protection, which detects heating failures and triggers an automatic shutdown to avoid dangerous situations.

Active Development and Support – TH3D Studio is dedicated to continuously improving and updating their firmware. They actively listen to user feedback, release regular firmware updates, and provide excellent customer support to address any questions or concerns. We patch most bugs that are reported to us in 1-2 business days or less.

Community and Documentation – TH3D Studio has a vibrant and supportive community around their firmware, offering a wealth of resources, including FB groups, discord server, guides, and troubleshooting tips. The availability of detailed documentation helps users understand the firmware’s features and functionality better.

Open-Source Philosophy – TH3D Studio follows an open-source approach, allowing users to contribute to the firmware’s development and customization. This fosters a collaborative environment where users can share their experiences, modifications, and enhancements, benefiting the entire community. TH3D also financially supports the Marlin Firmware Project which our Unified 2 firmware is built on top of.

What do you get? – Included is the full source code for compiling on your computer with Visual Studio Code. This firmware is tested by us on the actual boards and printers. Your purchase helps fund the development of the firmware for this board and others. If you get technical support we also will compile firmware for you if you have issues doing it on your own PC.

Board Models Supported

  • BTT SKR E3 Mini V1
  • BTT SKR E3 Mini V1.2
  • BTT SKR E3 Mini V2

CPUs Supported

  • STM32F103RCT6
  • STM32F103RET6

Download Terms & Information

How long will I get updates for?

You will get download access for 3 months (93 days) or 1 year (365 days) (whatever you selected) from the date of purchase. After that time the download access will expire. Once expired you will no longer be able to download the firmware unless you purchase it again. Make sure to download a copy before your subscription expires.

Slow CPU Disclaimer

Some printer boards that use slow CPUs (like the 8bit 2560 and entry level 32bit CPU boards under 90mhz speed) may experience a delayed response on the LCD when printing over SD while also using advanced features like input shaping. This does NOT affect print quality but is something to note in case you encounter it. Faster boards (like our EZBoard and MKS Boards) do not have this slowdown as they use a much quicker processor.

What happens when my subscription expires?

The firmware will NOT stop working after your subscription expires. Just make sure to download a copy before the expiration so you have it on your PC. Once the order for the firmware expires only the download link from our website will not work any longer.

How long will it take to get the firmware?

The firmware will be granted instantly once your payment clears. This is usually instantly unless your payment is held or fails to process.

Is Technical Support included?

There is NO technical support included with the purchase of this firmware unless you specifically add it on above. Technical support can be purchased separately by contacting our support team on a per-incident basis if you opt-out of purchasing support above with the firmware itself.

Does Technical Support include compiling the firmware for me?

Yes. We include up to 10 compiles (for the 3 month) and 20 compiles (for the 1 year) at no charge if you add on the technical support when you purchase the firmware or if you pay for technical support separately after purchase. Most compile requests are fulfilled in 1 business day or less.

Just send us a ticket with details on your printer (and configuration.h file if you have it setup) and we’ll send you a compiled BIN file back to flash on your machine. Technical support covers the boards, printers, and other features already in the firmware. Changes, modifications, and/or additions for new features, support other products, and/or other addons are NOT covered under the support.

Does the subscription Auto-Renew?

No. Our system does not support auto-renew at this time. If you wish to get updates again once your subscription expires you can purchase again for whatever length of time you wish that we offer.

What license is the firmware release under?

This firmware is released under the GPL V3 License.

Is the full source code included?

Yes. The download contains the FULL source code to build the firmware with Visual Studio Code. See the links above for your particular printer on how to setup Visual Studio Code and how to use the firmware.

What is the refund policy on digital downloads?

We do not offer refunds on digital downloads.

Additional information

Update Length

3 Months, 1 Year

Firmware Package

BTT SKR E3 Mini V1/V1.2/V2 Boards

Made In


4 reviews for Unified 2 Firmware for SKR E3 Mini V1/V1.2/V2.0 Boards

Based on 4 reviews
5 star
4 star
3 star
2 star
1 star
1-4 of 4 reviews
  1. Works as advertised!

    (0) (0)
  2. (0) (0)
  3. Avatar photo
    (0) (0)
  4. i have suport only for 3 month but the help a lot

    (0) (0)
Add a review
You must be logged in to post a review Log In

Q & A

Does this firmware work with Anet A8 and Anet A8 Plus original boards? Patrick w Osborn asked on November 27, 2023

No, this is for the SKR E3 Mini V1/V1.2/V2 boards. Check out help center for the Anet firmware.

Tim Hoogland answered on November 27, 2023 store manager
(0) (0)
What version of Marlin do you work with? with 2.1? Luis Rifo asked on November 19, 2023

Right now as of posting this comment we're on a 2.1.2 code base with custom and other patches from and the bugfix branch. Early Jan we're targeting a major update to the next major Marlin release.

Tim Hoogland answered on November 19, 2023 store manager
(0) (0)

Ask a question

Your question will be answered by a store representative or other customers.

Thank you for the question!

Your question has been received and will be answered soon. Please do not submit the same question again.



An error occurred when saving your question. Please report it to the website administrator. Additional information:

Add an answer

Thank you for the answer!

Your answer has been received and will be published soon. Please do not submit the same answer again.



An error occurred when saving your answer. Please report it to the website administrator. Additional information: