ESP32-2432S028R "Cheap Yellow Display"
2.8" 240x320 ILI9341 with XPT2046 resistive touch on a second SPI bus. The cheapest way into LVGL.
Building for it
A project is made for one toolchain, picked when you start it. All four can drive this board:
| Toolchain | |
|---|---|
| Arduino (C++) | Every board, every widget and every peripheral here. The most control, and the most to set up. Start a project |
| MicroPython | Change a screen by editing a file on the board. No compiler once it is flashed. Start a project |
| ESPHome | No compiler to install, and the panel can join Home Assistant as real entities. Start a project |
| ESP-IDF (C) | Espressif's own framework: esp_lcd, the component registry and idf.py, with nothing of Arduino in it. Start a project |
At a glance
| Part | Detail |
|---|---|
| Maker | Sunton |
| MCU | ESP32 (WROOM / WROVER) Xtensa LX6 dual-core @ 240 MHz, 520 KB SRAM (+ up to 8 MB PSRAM on WROVER) |
| Display | Ilitek ILI9341, 320 x 240 px, SPI (4-wire serial), 16-bit colour |
| Touch | XPTek XPT2046 (resistive, SPI) |
| Backlight | GPIO 21, dimmable (PWM) |
| Memory | 4 MB flash, no PSRAM (N4) |
| Graphics library | TFT_eSPI |
Display pins
ILI9341 on SPI (4-wire serial): SPI clock 40 MHz, host HSPI, RGB colour order, inversion off.
| Signal | Pin |
|---|---|
| SCK / CLK | GPIO 14 |
| MOSI / SDA | GPIO 13 |
| MISO / SDO | GPIO 12 |
| CS | GPIO 15 |
| DC / RS | GPIO 2 |
| RESET | not connected |
| Backlight | GPIO 21 |
Touch pins
XPT2046: 2500 kHz, its own SPI bus, X and Y swapped.
| Signal | Pin |
|---|---|
| SCK | GPIO 25 |
| MOSI | GPIO 32 |
| MISO | GPIO 39 |
| CS | GPIO 33 |
| IRQ / PENIRQ | GPIO 36 |
Also on the board
- CN1 I2C (GPIO 27 / 22) - SDA GPIO 27, SCL GPIO 22
The preset adds these to the Hardware tab with the board, so a sensor can go straight onto the connector.
Check your revision. Touch runs on its own VSPI bus, separate from the display HSPI bus. The 2432S028 also ships in a capacitive CST820 variant. Colour order is RGB with inversion off, confirmed on hardware - if a clone shows a negative image or swaps red and blue, change them on the Display tab.
Designing for it in LCD Wizard
- Choose ESP32-2432S028R "Cheap Yellow Display" on the Hardware tab (or use the button above) and every pin on this page is filled in. The export writes the sketch,
lcd_pins.h, the TFT_eSPI configuration,lv_conf.handplatformio.ini- a project that builds for this board as it comes. - The XPT2046 is resistive, so the firmware calibrates it on the device: touch the crosses on the first boot after an upload and the result is saved. The screen says whether it worked.
- The backlight is dimmable: give a slider or a button a Set backlight action.
- Screens are designed for 320 x 240 px in either orientation, with LVGL 9 or LVGL 8.
The parts
ILI9341. The most common hobby TFT. 2.2"-2.8" modules, usually with an XPT2046 resistive panel.
XPT2046. The classic 4-wire resistive controller. Needs calibration. Can share the display SPI bus with its own CS.
ESP32 (WROOM / WROVER). No native RGB parallel peripheral - use SPI or an 8/16-bit i80 bus.
TFT_eSPI. Fastest for SPI panels on ESP32. Configured via User_Setup.h build defines.
The pinout on one page
Every pin above, laid out to print and keep beside the bench. Generated from this preset, so it says exactly what the designer writes into lcd_pins.h.
Download the pinout (PNG)Open it as SVG
The same pins as data - board.json and pins.csv - are in the open pinout dataset on GitHub, free to reuse under CC BY 4.0.
From the people who made it
The board’s own documentation. Pinouts on vendor pages do sometimes disagree with the hardware in front of you - where this page and that one differ, trust your board and tell us.
- The vendor’s product page
- Vendor documentation
- Schematic (PDF)
- ESP32-Cheap-Yellow-Display (community reference)
- Manufacturer resource archive - 2.8inch_ESP32-2432S028R.rar
Designs for this board
Clone any of them into the designer, or see every design for this board in the gallery.
Similar boards
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- Quick start - from an empty screen to firmware on the board
- Boards and displays - presets, controllers, pins and touch in the designer
- Flashing and configuration - PlatformIO, the Arduino IDE and first-boot checks
- Troubleshooting - a white screen, mirrored image or touch that misses