Sunton / CYD · ESP32 · 2.8" · 240×320
Sunton (CYD) ESP32-2432S028R 2.8" — a classic "Cheap Yellow Display" specifications
The Sunton (CYD) ESP32-2432S028R 2.8" — a classic "Cheap Yellow Display" is a 2.8" 240×320 display board by Sunton / CYD, built around the ESP32 (ESP32-WROOM-32 module) running at 240 MHz. The panel uses a ILI9341 (SPI) controller over SPI, with XPT2046 (resistive, on its own SPI bus) touch input. Memory: 4 MB flash, no PSRAM; wireless: Wi-Fi and Bluetooth. LCD Ultra Pro supports it with a ready-made LVGL 8.4 display driver, so you can design its UI visually and export a complete Arduino project.
- Screen
- 2.8" · 240×320
- Chip
- ESP32
- Memory
- 4 MB flash, no PSRAM
- Input
- resistive touch
Specifications
| Manufacturer | Sunton / CYD |
|---|---|
| Screen size | 2.8" |
| Resolution | 240×320 px |
| Colour depth | 16-bit |
| Display controller | ILI9341 (SPI) |
| Display interface | SPI |
| Touch | XPT2046 (resistive, on its own SPI bus) |
| Microcontroller | ESP32 |
| Module | ESP32-WROOM-32 |
| CPU clock | 240 MHz |
| Internal SRAM | 520 KB |
| PSRAM | None |
| Flash | 4 MB |
| Wi-Fi | Yes |
| Bluetooth | Yes |
| Hardware variant | Original ESP32-2432S028R (“Cheap Yellow Display”, single micro-USB, ILI9341). Not the newer USB-C “CYD2USB” version, which has an ST7789. |
Free GPIOs and connectors
These GPIOs are not used by the display, touch or on-board peripherals, so you can wire your own sensors, buttons or relays to them.
| Pin | Capabilities | Note |
|---|---|---|
| GPIO 0 | GPIO, BOOT | Boot button (IO0) — not on a header |
| GPIO 1/TX | GPIO, UART_TX | UART0 TX — on the P1 header (shared with the USB-UART bridge) |
| GPIO 3/RX | GPIO, UART_RX | UART0 RX — on the P1 header (shared with the USB-UART bridge) |
| GPIO 22 | GPIO, PWM | On the P3 and CN1 headers — good for I2C (with GPIO 27) |
| GPIO 27 | GPIO, PWM | On the CN1 header |
| GPIO 35 | GPIO, ADC | On the P3 header — input-only, no internal pull-up |
- Serial header (P1) — GPIO 1, 3 (TX, RX)
Shared with the USB-UART bridge — the serial monitor and uploads use it too
- GPIO header (P3) — GPIO 21, 22, 35
GPIO 21 is the display backlight — not usable. GPIO 35 is input-only. No 3V3 pin on P3 (only GND).
- GPIO / I2C header (CN1) — GPIO 22, 27
Good for an I2C sensor (SDA / SCL on 22 / 27)
LVGL support in LCD Ultra Pro
| Driver status | Compile-tested |
|---|---|
| Arduino export | Complete LVGL 8.4 project with the display driver |
| USB Live preview | No |
| Orientations | 0°, 90° |
| Brightness control | Hardware backlight dimming |
Pick this board in the editor and the canvas matches its exact resolution and shape. Build the interface with widgets, add events without code, try it in Live Preview, then export it as a ready-to-compile Arduino project. See the documentation for the workflow.
Frequently asked questions
What is the resolution of the Sunton (CYD) ESP32-2432S028R 2.8" — a classic "Cheap Yellow Display"?
240×320 pixels on a 2.8" screen, driven at 16-bit colour depth.
Which display controller and interface does it use?
ILI9341 (SPI) over SPI.
Does the Sunton (CYD) ESP32-2432S028R 2.8" — a classic "Cheap Yellow Display" have a touchscreen?
Yes — XPT2046 (resistive, on its own SPI bus).
Which ESP32 chip and how much memory does it have?
ESP32 (ESP32-WROOM-32) at 240 MHz, 4 MB flash, no PSRAM.
Which GPIOs are free for my own sensors or relays?
6 GPIOs are free: GPIO 0, GPIO 1/TX, GPIO 3/RX, GPIO 22, GPIO 27, GPIO 35.
Can I use LVGL on the Sunton (CYD) ESP32-2432S028R 2.8" — a classic "Cheap Yellow Display"?
Yes. LCD Ultra Pro has a ready-made LVGL 8.4 display driver for this board (Compile-tested). Design the UI in the browser and export a ready-to-compile Arduino project.
Sources
Specifications cross-checked against the manufacturer’s documentation (last checked 2026-10-27):
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