# BigTreeTech TFT35-E3 V3.0

> 3.5-inch dual-mode display designed as a direct replacement for the Ender 3 stock LCD. STM32 based with touchscreen TFT and 12864 emulation modes, supports SD and USB printing.

## Quick Facts

- **Brand:** BigTreeTech
- **Board Type:** Display
- **Product Readiness:** consumer
- **CPU:** STM32F207VCT6 ARM Cortex-M3 @ 120MHz
- **CPU Architecture:** ARM Cortex-M3
- **CPU Cores:** 1
- **RAM:** 256KB SRAM
- **Flash:** 256KB Flash
- **Power:** 5V DC
- **Operating Voltage:** 3.3V
- **SD Card:** microSD
- **Display:** 3.5 inch TFT Color Touchscreen,12864 LCD (dual mode)

## Open Source

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

## Compatible Firmware

Marlin, Klipper

## Use Cases

- 3D Printing

## Components

- **STM32F207VCT6** (mcu): STMicroelectronics STM32F207VCT6 32-bit ARM Cortex-M3 microcontroller at 120MHz — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.st.com%2Fen%2Fmicrocontrollers-microprocessors%2Fstm32f207vc.html&ref=openhardware.directory&product=bigtreetech-tft35-e3-v3-0&source=md-export)

## Protocols

- **UART**
- **SPI**
- **RS232**

## Description

The BigTreeTech TFT35-E3 V3.0 is a 3.5-inch dual-mode display specifically designed to replace the original LCD screen on Creality Ender 3 printers and similar machines. It is powered by an STM32F207VCT6 ARM Cortex-M3 at 120MHz and offers two selectable operating modes: a full-color TFT touchscreen mode using RS232 serial, and a 12864 LCD emulation mode without touch.

In touchscreen mode, users gain a modern interface for temperature control, SD card/USB flash drive printing, and print management. In 12864 mode, it behaves identically to the stock Ender 3 display. The board includes EXP1, EXP2, and EXP3 connectors — the EXP3 port is specifically tailored for SKR MINI E3 V1.2 and SKR E3 DIP V1.1, enabling zero-rework installation. Reserved ports for filament detection (FIL-DET) and automatic power-off (PS-ON) are also present, along with a WiFi module header for optional wireless connectivity.

The board dimensions are 93x87mm, matching the Ender 3 original screen footprint for easy retrofitting. Firmware updates are applied via microSD card. Full schematics and firmware source are open-source on GitHub.

## Where to Buy

- [BIQU Equipment](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbtt-tft35-e3-v3-0-display-touch-screen-two-working-modes&ref=openhardware.directory&product=bigtreetech-tft35-e3-v3-0&source=md-export)

## Resources

- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fbigtreetech%2FBTT-TFT35-E3-V3.0&ref=openhardware.directory&product=bigtreetech-tft35-e3-v3-0&source=md-export)
- [product](https://openhardware.directory/r?to=https%3A%2F%2Fbiqu.equipment%2Fproducts%2Fbtt-tft35-e3-v3-0-display-touch-screen-two-working-modes&ref=openhardware.directory&product=bigtreetech-tft35-e3-v3-0&source=md-export)

## Tags

`3d-printing`, `display`, `touchscreen`, `tft35`, `ender-3`, `dual-mode`, `12864`, `marlin`, `klipper`, `bigtreetech`, `stm32`, `3.5-inch`, `creality`

## Images

![BigTreeTech TFT35-E3 V3.0](https://nbg1.your-objectstorage.com/openhardware-directory/entities/bigtreetech-tft35-e3-v3-0/5ab0be2e3164.jpg)
![BigTreeTech TFT35-E3 V3.0](https://nbg1.your-objectstorage.com/openhardware-directory/entities/bigtreetech-tft35-e3-v3-0/4826ee2a3a95.jpg)
![BigTreeTech TFT35-E3 V3.0](https://nbg1.your-objectstorage.com/openhardware-directory/entities/bigtreetech-tft35-e3-v3-0/e2f0df226099.jpg)
![BigTreeTech TFT35-E3 V3.0](https://nbg1.your-objectstorage.com/openhardware-directory/entities/bigtreetech-tft35-e3-v3-0/feeab13c2b1b.jpg)
![BigTreeTech TFT35-E3 V3.0](https://nbg1.your-objectstorage.com/openhardware-directory/entities/bigtreetech-tft35-e3-v3-0/a1d09b11630a.jpg)
![BigTreeTech TFT35-E3 V3.0](https://nbg1.your-objectstorage.com/openhardware-directory/entities/bigtreetech-tft35-e3-v3-0/ed977a2139c9.jpg)

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