BIGTREETECH SKR Mini E3 V3.0 Control Board +TFT35 E3 V3.0.1 Touch Screen Display 32Bit Silent Board Integrated with TMC2209 UART Stepper Driver Compatible with Ender 3/5 Ender 3 Pro/V2 3D Printer
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AI Verdict
This combo is a massive acoustic and thermal upgrade for stock Ender 3s, but the agonizing firmware setup and Klipper touchscreen limitations make it strictly for tinkerers.
This combo is brilliant if you are running Marlin and want to silence an older Ender 3 while adding a touchscreen. The firmware configuration is a headache, and the screen's touch features are completely incompatible with Klipper.
If you plan to run Klipper, skip the TFT35 combo and just buy the SKR Mini E3 V3.0 standalone, pairing it with a standard HDMI screen connected to your Raspberry Pi.
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Pros
- TMC2209 V1.3 drivers completely eliminate stepper motor whine during prints
- Features 3 independent PWM fan headers to separately control the hotend, part cooling, and motherboard fans
- Large aluminum heatsink provides significantly better thermal dissipation for the MOSFETs than the V2 board
- Includes dedicated 5-pin ports for BLTouch/CRTouch probes without needing a pinout adapter
- Physical dimensions and mounting holes are an exact drop-in match for the stock Ender 3 and Ender 5
Cons
- Stock Creality hotend fans have bare wires, forcing you to crimp your own JST connector to use the board's PWM header
- TFT35 touch interface does not work with Klipper firmware, restricting you to the basic 12864 Marlin emulator mode
- Included pre-compiled firmware is often buggy, requiring you to compile your own Marlin build via PlatformIO
- Uses an outdated Micro-USB port instead of USB-C for host connections
Dimension Scores
The upgraded heatsink keeps the MOSFETs and TMC2209 drivers exceptionally cool during long prints.
Adding a third PWM fan header and built-in EEPROM is great, but the parallel Z-stepper limits advanced leveling.
Includes dedicated ports for filament runout, BLTouch, and Neopixels, but lacks a 5th stepper driver for true dual-Z.
BTT's official documentation is severely lacking, and the pre-compiled firmware often has bugs requiring manual compilation.
Best For
- Ender 3 owners looking to silence their machine's stock stepper motors
- Tinkerers comfortable compiling custom Marlin firmware in VSCode
- Users upgrading to a BLTouch and dual Z-axis lead screws simultaneously
Not Recommended For
- Klipper users wanting a full-color touchscreen interface at the printer
- Beginners expecting a true plug-and-play firmware experience
Watch Out For
- The hotend fan header requires a JST connector — if you have a stock Ender 3, you must splice or crimp a new connector onto your bare fan wires.
- The TFT35 requires two separate cables connected at the same time (the 10-pin EXP3 and the 5-pin RS232) or the touch mode will fail.
- You will almost certainly get a 'No Printer Attached' error on the screen until you manually set the baud rate to 115200 and configure Serial Port 2 in Marlin.
- If you switch to Klipper later, the TFT35's touch mode becomes a paperweight because it relies on Marlin's simulated serial port to function.
Full Specifications
| ASIN | B09MYT45BQ |
| Brand | BIGTREETECH Direct |
| Platform | Windows XP |
| Model Name | BIGTREETECH SKR MINI E3 V3.0+TFT35 E3 V3.0.1 |
| Item Weight | 9.9 ounces |
| Chipset Type | STM32G0B0RET6 |
| Manufacturer | BIGTREETECH Direct |
| Item model number | SKR MINI E3 V3.0+TFT35 E3 V3.0.1 |
| Compatible Devices | Printer |
| Memory Clock Speed | 12864 MHz |
| Product Dimensions | 4.08 x 2.77 x 2.77 inches |
| Compatible Processors | STM32G0 series |
| RAM Memory Technology | DDR4 |
| Memory Storage Capacity | 8 GB |
| Main Power Connector Type | 2.1mm DC barrel jack |
What Buyers Say
The most jarring discovery for new buyers is that 'drop-in replacement' only applies to the mounting holes, not the wiring or software. You will need to crimp a JST connector for your hotend fan and likely compile your own Marlin firmware to get the touchscreen communicating properly. Once configured, the silence of the TMC2209 drivers is genuinely shocking compared to stock Creality boards. The upgraded heatsink design is a massive improvement for thermal management. Klipper users are consistently disappointed to find out the TFT35 touch mode is entirely useless on their setup.
“The board is dead silent and prints great now, but getting the firmware compiled and that damn 'No printer attached' error to go away took me two days of pulling my hair out.”
Common Praise
- TMC2209 drivers make the printer movements virtually silent
- Third PWM fan header allows the motherboard fan to turn off when not printing
- Dedicated 5-pin probe port makes BLTouch installation physically straightforward
- Marlin emulator mode on the TFT35 works flawlessly as a fallback
Common Complaints
- Constant 'No Printer Attached' errors on the TFT35 due to serial port configuration issues
- Lack of documentation regarding the need to crimp JST connectors for stock fans
- Pre-compiled firmware from BTT's GitHub is frequently outdated or buggy
- Touchscreen mode is completely incompatible with Klipper firmware
Ownership Tips
- The Micro-USB port feels fragile and requires careful cable routing to avoid snapping.
- You have to press and hold the physical knob for 3 seconds to switch between Touch Mode and Marlin Mode.
- The board's 5V RGB rail doesn't output enough juice to power a long strip of Neopixels without an external power source.
Frequently Asked Questions
Why does my TFT35 screen say 'No Printer Attached'?
This happens when the screen and motherboard can't communicate over serial. You need to ensure the 5-pin RS232 cable is plugged in, set the screen's baud rate to 115200, and define SERIAL_PORT 2 in your Marlin firmware.
Does the TFT35 touch screen work with Klipper?
No. The touch interface relies on a simulated serial port that Klipper doesn't support. In Klipper, the screen will only function in the basic 12864 Marlin emulator mode.
Do I need to change the wiring for my BLTouch?
No, the SKR Mini E3 V3.0 has a dedicated 5-pin Z-probe port that matches the standard Creality BLTouch/CRTouch cable pinout perfectly.
How do I connect the stock Ender 3 hotend fan?
The stock Creality hotend fan uses bare wires screwed into a terminal block, but the SKR Mini E3 V3.0 uses JST-XH headers for all three fans. You will need to crimp a JST connector onto your fan wires or splice one in.
Does this board support dual independent Z-axis motors?
It has two Z-axis motor ports, but they are wired in parallel to a single TMC2209 driver. You cannot do independent Z-auto alignment (G34) with this board.
Buying Guide
You are buying a hardware upgrade that requires software compilation skills. Do not expect to just plug the cables in and start printing. You need to be comfortable editing Configuration.h files in VSCode/PlatformIO to get the screen and probe working correctly. If you plan to run Klipper, do not buy this combo — buy the board by itself, as the touchscreen features only work in Marlin.
TMC2209 UART Stepper Drivers
These chips control the motors. The 'UART' part means the motherboard can talk to them digitally to adjust their power, and they use stealth technology to eliminate the robotic whining noise older printers make.
3 PWM Fan Headers
PWM means the motherboard can control the fan speed. Having three means your hotend, part cooling, and motherboard fans can all be controlled independently, making the printer much quieter when idle.
Dual Z-Axis Ports (Parallel)
It has two plugs for Z-axis motors, but they share the same brain. They will move together perfectly, but the printer can't adjust them independently to level a crooked X-gantry.
Alternatives
If you want true independent dual Z-axis control, look for a board with 5 independent stepper drivers. If you run Klipper, look for a standalone board and a KlipperScreen-compatible HDMI display.
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