# BigTreeTech SKR Mini E3 V3.0

> Latest 32-bit SKR Mini E3 with STM32G0B1RET6 @ 64MHz, 4 integrated TMC2209 UART drivers, USB-C, and CAN bus support. Compact Ender 3 drop-in upgrade. Marlin and Klipper compatible.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** 3D Printer Control Board
- **Price:** ~$25.99
- **Product Readiness:** consumer
- **CPU:** STM32G0B1RET6
- **CPU Architecture:** ARM Cortex-M0+
- **CPU Cores:** 1
- **RAM:** 144KB
- **Flash:** 512KB
- **USB:** USB Type-C
- **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

- **STM32G0B1RET6** (MCU): STMicroelectronics STM32G0B1RET6 32-bit ARM Cortex-M0+ microcontroller, 512KB flash, 144KB RAM, with CAN bus and USB Type-C — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Fstm32g0b1re.pdf&ref=openhardware.directory&product=bigtreetech-skr-mini-e3-v3-0&source=md-export)
- **TMC2209 (integrated x4)** (Stepper Driver): 4x TRINAMIC TMC2209 stepper drivers integrated on PCB with UART mode, StealthChop2, 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-v3-0&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-for-ender-3&ref=openhardware.directory&product=bigtreetech-skr-mini-e3-v3-0&source=md-export)

## Protocols

- **UART**
- **SPI**
- **I2C**
- **USB**
- **CAN bus**

## Description

The BigTreeTech SKR Mini E3 V3.0 is the latest iteration of the popular SKR Mini E3 series and represents a significant hardware upgrade. It moves from the STM32F103 to the STM32G0B1RET6 ARM Cortex-M0+ processor with a larger 512KB flash and improved peripherals, while maintaining the same compact form factor as its predecessors for Ender 3 compatibility.

Key improvements in V3.0 include USB Type-C connectivity replacing Micro-B, native CAN bus support for future toolhead expansion, and improved EMI filtering. The board retains 4 integrated TMC2209 stepper drivers in UART mode with StealthChop2 and stallGuard. Dual Z-axis ports are carried over from V2.0.

The board accepts 12–24V DC input, includes a MicroSD slot, BLTouch/CR Touch header, filament runout sensor input, and display connectors. Full open-source hardware files are published on GitHub and both Marlin 2.x and Klipper firmware are supported with configuration examples 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-for-ender-3&ref=openhardware.directory&product=bigtreetech-skr-mini-e3-v3-0&source=md-export) — $25.99

## 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-v3-0&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-for-ender-3&ref=openhardware.directory&product=bigtreetech-skr-mini-e3-v3-0&source=md-export)

## Tags

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

## Images

![BigTreeTech SKR Mini E3 V3.0](https://nbg1.your-objectstorage.com/openhardware-directory/entities/bigtreetech-skr-mini-e3-v3-0/70fd743e4708.jpg)
![BigTreeTech SKR Mini E3 V3.0](https://nbg1.your-objectstorage.com/openhardware-directory/entities/bigtreetech-skr-mini-e3-v3-0/51769281a56d.jpg)
![BigTreeTech SKR Mini E3 V3.0](https://nbg1.your-objectstorage.com/openhardware-directory/entities/bigtreetech-skr-mini-e3-v3-0/de336e9bb9ad.jpg)
![BigTreeTech SKR Mini E3 V3.0](https://nbg1.your-objectstorage.com/openhardware-directory/entities/bigtreetech-skr-mini-e3-v3-0/c7a8f8038bc0.jpg)
![BigTreeTech SKR Mini E3 V3.0](https://nbg1.your-objectstorage.com/openhardware-directory/entities/bigtreetech-skr-mini-e3-v3-0/d477e33e2277.jpg)
![BigTreeTech SKR Mini E3 V3.0](https://nbg1.your-objectstorage.com/openhardware-directory/entities/bigtreetech-skr-mini-e3-v3-0/5f1a3895f684.jpg)
![BigTreeTech SKR Mini E3 V3.0](https://nbg1.your-objectstorage.com/openhardware-directory/entities/bigtreetech-skr-mini-e3-v3-0/21b50a7a40b4.jpg)
![BigTreeTech SKR Mini E3 V3.0](https://nbg1.your-objectstorage.com/openhardware-directory/entities/bigtreetech-skr-mini-e3-v3-0/e7334c713333.jpg)

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