ESP32-2432S028C (capacitive CYD)
Capacitive variant of the Cheap Yellow Display: same ILI9341, CST820 touch over I2C.
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 | Hynitron CST820 (capacitive, I2C) |
| 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
CST820: I2C address 0x15, 400 kHz.
| Signal | Pin |
|---|---|
| SDA | GPIO 33 |
| SCL | GPIO 32 |
| RESET | GPIO 25 |
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. GPIO21 drives the backlight here, which is the pin the CST820 interrupt would otherwise use, so touch is polled instead - no behaviour is lost. Colour order is RGB with inversion off, confirmed on hardware.
Designing for it in LCD Wizard
- Choose ESP32-2432S028C (capacitive CYD) 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 CST820 is capacitive and needs no calibration. The firmware resets it and checks it answers on every boot.
- 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.
CST820. Found on capacitive versions of the ESP32-2432S028 "Cheap Yellow Display".
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.
- ESP32-Cheap-Yellow-Display (community reference, incl. variant identification)
- esp32-smartdisplay - board definitions for the CYD family
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