# BigTreeTech SKR Mini E3 V2.0

> Improved 32-bit control board with 4 integrated TMC2209 UART drivers, dual Z ports, and STM32F103RCT6 @ 72MHz. Drop-in upgrade for Ender 3, CR-10S, Ender 5. Marlin and Klipper ready.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** 3D Printer Control Board
- **Price:** ~$27.99
- **Product Readiness:** consumer
- **CPU:** STM32F103RCT6
- **CPU Architecture:** ARM Cortex-M3
- **CPU Cores:** 1
- **RAM:** 48KB
- **Flash:** 256KB
- **USB:** USB Micro-B
- **Power:** 12-24V DC
- **Operating Voltage:** 3.3V
- **SD Card:** MicroSD

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** Yes

## Compatible Firmware

Marlin, Klipper

## Use Cases

- 3D Printing

## Components

- **STM32F103RCT6** (MCU): STMicroelectronics STM32F103RCT6 32-bit ARM Cortex-M3 microcontroller, 256KB flash, 48KB RAM, running at 72MHz — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fstm32f103rc.pdf&ref=openhardware.directory&product=bigtreetech-skr-mini-e3-v2-0&source=md-export)
- **TMC2209 (integrated x4)** (Stepper Driver): 4x TRINAMIC TMC2209 stepper drivers integrated on PCB with UART mode, StealthChop2, SpreadCycle, and stallGuard for sensorless homing — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.trinamic.com%2Ffileadmin%2Fassets%2FProducts%2FICs_Documents%2FTMC2209_Datasheet_V103.pdf&ref=openhardware.directory&product=bigtreetech-skr-mini-e3-v2-0&source=md-export)
- **MicroSD slot** (Storage): MicroSD card slot for firmware flashing and standalone print file storage — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-skr-mini-e3-v2-0-32-bit-control-board-integrated-tmc2209-uart-for-ender-4&ref=openhardware.directory&product=bigtreetech-skr-mini-e3-v2-0&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **USB**

## Description

The BigTreeTech SKR Mini E3 V2.0 is an enhanced revision of the popular SKR Mini E3 series, designed as a compact drop-in replacement for Ender 3 and compatible Creality printers. It retains the STM32F103RCT6 ARM Cortex-M3 processor at 72MHz with 4 integrated TMC2209 stepper drivers, while adding key hardware improvements based on community feedback.

Version 2.0 adds dual Z-axis interface ports for independent dual-Z setups, expanding printer compatibility to include CR-10S, CR-10 S4, CR-10 S5, Ender 5, Ender 5 Pro, and Ender 5 Plus. The integrated TMC2209 UART drivers provide ultra-quiet StealthChop2 operation and stallGuard sensorless homing without requiring separate driver modules.

The board supports 12–24V DC input, USB Micro-B for host connectivity, a MicroSD slot for file access, and standard display expansion headers. Full open-source hardware files including schematics and PCB layouts are available on GitHub. Both Marlin 2.x and Klipper firmware configurations are supported and pre-configured examples are available from the Marlin Configurations repository.

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-skr-mini-e3-v2-0-32-bit-control-board-integrated-tmc2209-uart-for-ender-4&ref=openhardware.directory&product=bigtreetech-skr-mini-e3-v2-0&source=md-export) — $27.99

## Resources

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FBIGTREETECH-SKR-mini-E3&ref=openhardware.directory&product=bigtreetech-skr-mini-e3-v2-0&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbigtreetech-skr-mini-e3-v2-0-32-bit-control-board-integrated-tmc2209-uart-for-ender-4&ref=openhardware.directory&product=bigtreetech-skr-mini-e3-v2-0&source=md-export)

## Tags

`3d-printer`, `control-board`, `stm32`, `marlin`, `klipper`, `bigtreetech`, `open-source`, `32-bit`, `tmc2209`, `ender-3`, `mini`, `integrated-drivers`, `dual-z`

## Images

![BigTreeTech SKR Mini E3 V2.0](https://nbg1.your-objectstorage.com/openhardware-directory/entities/bigtreetech-skr-mini-e3-v2-0/0de49397f99a.jpg)
![BigTreeTech SKR Mini E3 V2.0](https://nbg1.your-objectstorage.com/openhardware-directory/entities/bigtreetech-skr-mini-e3-v2-0/63e831e610fa.jpg)
![BigTreeTech SKR Mini E3 V2.0](https://nbg1.your-objectstorage.com/openhardware-directory/entities/bigtreetech-skr-mini-e3-v2-0/c84e622d0b53.jpg)
![BigTreeTech SKR Mini E3 V2.0](https://nbg1.your-objectstorage.com/openhardware-directory/entities/bigtreetech-skr-mini-e3-v2-0/0b844de16c7a.jpg)
![BigTreeTech SKR Mini E3 V2.0](https://nbg1.your-objectstorage.com/openhardware-directory/entities/bigtreetech-skr-mini-e3-v2-0/3d73002e87a7.jpg)
![BigTreeTech SKR Mini E3 V2.0](https://nbg1.your-objectstorage.com/openhardware-directory/entities/bigtreetech-skr-mini-e3-v2-0/9e556cd17c71.jpg)
![BigTreeTech SKR Mini E3 V2.0](https://nbg1.your-objectstorage.com/openhardware-directory/entities/bigtreetech-skr-mini-e3-v2-0/814199582d50.jpg)
![BigTreeTech SKR Mini E3 V2.0](https://nbg1.your-objectstorage.com/openhardware-directory/entities/bigtreetech-skr-mini-e3-v2-0/cebdb0919841.png)

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