Boards / All-in-one boards

ESP32-2432S028, two USB ports, ILI9341 (alt init)

The CYD with two USB sockets (micro-USB and USB-C), marked ESP32-2432S028 without the R, whose ILI9341 needs the alternative start-up with colours inverted. Same pins as the original CYD. Not sure which CYD you have? The CYD diagnostic decides.

The ESP32-2432S028, two USB ports, ILI9341 board — Photograph: Makerfabs (reseller product photo for the Sunton ESP32-2432S028R) · vendor product photo, no licence stated

Design a UI for this board Read the quick start

Got a CYD but not sure which one? Run the CYD diagnostic

About two minutes: it shows your board’s name and the settings to use.

Run the CYD diagnostic

When it’s done, pick the board it names in the designer. If it says no entry matches, paste the line from the serial monitor into a ticket.

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 (alt init), 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 (alt init) on SPI (4-wire serial): SPI clock 40 MHz, host HSPI, BGR colour order, inversion on.

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. Two USB sockets and ESP32-2432S028 (no R) on the board; run the CYD diagnostic to be sure, since the same board ships with other screens. ILI9341 (alt init) with colours inverted is what a member's board of this kind needed on the ESP-IDF export (2026-11-11), and what LovyanGFX uses for this panel. On Arduino the alt init (TFT_eSPI's ILI9341_2_DRIVER) also sends its own gamma curve, which the ESP-IDF start-up does not, so shades may differ slightly between the two; not yet seen on this board. ESPHome has one ILI9341 start-up, so there the alt init is the same as the plain one. Touch: the first start calibrates it, whichever way the touch chip is wired.

Designing for it in LCD Wizard

Choose ESP32-2432S028, two USB ports, ILI9341 (alt init) 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.h and platformio.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 (alt init). Alternate init sequence for clone panels that show inverted or shifted output.

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.

Designs for this board

Nobody has published a design for this board yet. Publish yours from the designer and it appears here and in the gallery.

From the blog

Which Cheap Yellow Display have you actually got?Same name on the box, different screen inside. Two minutes tells you which one you've got.10 November 2026

ESP32-2432S028 "Cheap Yellow Display", two USB ports, ILI9341The CYD with a micro-USB and a USB-C port, in its ILI9341 batch: 2.8" 240x320 ILI9341 with XPT2046 resistive touch on a second SPI bus. Same pins as the original CYD.ESP32 · ILI9341 240 x 320 · XPT2046 touch

ESP32-2432S028C (capacitive CYD)Capacitive variant of the Cheap Yellow Display: same ILI9341, CST820 touch over I2C.ESP32 · ILI9341 320 x 240 · CST820 touch

ESP32-2432S028R "Cheap Yellow Display", ST7789 versionThe CYD with an ST7789 screen (often the one with two USB ports, though some have one): 2.8" 240x320 ST7789 with XPT2046 resistive touch on a second SPI bus. Same pins as the original CYD.ESP32 · ST7789 240 x 320 · XPT2046 touch

ESP32-2432S028R "Cheap Yellow Display"2.8" 240x320 ILI9341 with XPT2046 resistive touch on a second SPI bus. The cheapest way into LVGL.ESP32 · ILI9341 320 x 240 · XPT2046 touchPurchase this board

Guition JC2432W328R (2.8" resistive, one USB-C)Guition's 2.8" CYD in a clear case: 240x320 ST7789 with XPT2046 resistive touch on the panel's own SPI bus, backlight on GPIO 27, TF card, RGB LED, speaker and light sensor.ESP32 · ST7789 240 x 320 · XPT2046 touch

Guition JC2432W328C (2.8" capacitive, one USB-C)Guition's 2.8" CYD in a clear case: 240x320 ST7789 with CST820 capacitive touch, backlight on GPIO 27, TF card, RGB LED, speaker and light sensor.ESP32 · ST7789 240 x 320 · CST820 touchPurchase this board

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