Boards / All-in-one boards

LCDWIKI 3.5" ESP32-S3 (ES3C35P)

3.5" 320x480 ST77922 over QSPI with touch in the same chip, an ES8311 codec with microphone and speaker output, a WS2812 LED, a 4-bit SD slot and battery charging.

The LCDWIKI 3.5" ESP32-S3 board — Photograph: LCDWIKI · vendor product image, no licence stated

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Building for it

A project is made for one toolchain, picked when you start it. For this board you can use three of the four:

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	ESPHome has no driver for this controller.
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	LCDWIKI
MCU	ESP32-S3 Xtensa LX7 dual-core @ 240 MHz, 512 KB SRAM (+ 2-16 MB PSRAM on most modules)
Display	Sitronix ST77922, 320 x 480 px, QSPI (quad SPI), 16-bit colour
Touch	Sitronix ST77922 (touch half) (capacitive, I2C)
Backlight	GPIO 41, dimmable (PWM)
Memory	16 MB flash, 8 MB octal PSRAM (N16R8)
Graphics library	GFX Library for Arduino

Display pins

ST77922 on QSPI (quad SPI): QSPI clock 40 MHz, host SPI2_HOST, RGB colour order, inversion on.

Signal	Pin
SCK	GPIO 12
D0 - D3	GPIO 11, 13, 14, 9
CS	GPIO 10
RESET	not connected
Backlight	GPIO 41

Touch pins

ST77922 (touch half): I2C address 0x55, 400 kHz, shares the display bus.

Signal	Pin
SDA	GPIO 38
SCL	GPIO 39
INT / IRQ	GPIO 47
RESET	GPIO 48

Also on the board

I2C (GPIO 38 / 39, P4 header) - SDA GPIO 38, SCL GPIO 39
SDCard - SD card, CLK GPIO 5, CMD GPIO 4, D0 GPIO 6, D1 GPIO 7, D2 GPIO 2, D3 GPIO 3
RgbLed - NeoPixel string, DATA GPIO 40
Battery - analog input on GPIO 8
Boot Button - input on GPIO 0

The preset adds these to the Hardware tab with the board, so a sensor can go straight onto the connector.

Check your revision. The ST77922 wants 4-pixel-aligned windows and has no row/column swap: upright it is drawn in parts, each widened to 4 columns; turned, the Arduino export draws whole frames from a canvas in PSRAM, and the MicroPython export does not turn it at all. Its reset is the board's RESET button, not a GPIO: after flashing other firmware, unplug it once if the screen stays dark. Touch (0x55), the ES8311 (0x18) and the P4 header share I2C on GPIO 38/39. The speaker amplifier is enabled by pulling GPIO1 low, and the WS2812 on GPIO40 is a single LED. USB-C goes straight to the S3, so the serial log needs USB CDC On Boot (the export sets it). GPIO45 and 46 on the P3 header are strapping pins. The microphone goes into the ES8311 and comes back on GPIO 16 - switch it on under Hardware > Audio.

Designing for it in LCD Wizard

Choose LCDWIKI 3.5" ESP32-S3 (ES3C35P) 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 GFX Library for Arduino configuration, lv_conf.h and platformio.ini - a project that builds for this board as it comes.
The ST77922 (touch half) 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.
With PSRAM the LVGL memory pool can live there, leaving internal RAM for everything else.
Screens are designed for 320 x 480 px in either orientation, with LVGL 9 or LVGL 8.

The parts

ST77922. Sitronix touch-and-display chip on QSPI. Drawn a whole frame at a time, so it needs PSRAM.

ST77922 (touch half). The touch half of the ST77922 touch-and-display chip, on the panel's own I2C lines.

ESP32-S3. The only common Arduino target with a hardware RGB565 LCD peripheral. PSRAM is effectively required for RGB panels.

GFX Library for Arduino. Moshi Liu's library. Best QSPI/AMOLED and RGB coverage. Configured in code.

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.

Designs for this board

Spectrum Analyser Showcase: four styles from one microphoneFour Spectrum analysers on the LCDWIKI ES3C35P (3.5", 320 x 480, ESP32-S3), all fed from the board's own ES831...by jonathan harrocks ORBITALA futuristic internet radio for LCDWIKI's 3.5-inch ESP32-S3 display (ES3C35P), and the design to reach for whe...by jonathan harrocks Bertie the Wizard: an AI voice assistant with a faceA tribute to Bertie, a helper on the way to perfection. Bertie the Wizard is an AI voice assistant with a face...by jonathan harrocks OBS Stream DeckA stream deck for OBS Studio on a 3.5-inch ESP32-S3 touchscreen: five scenes, mute and push-to-talk, record, p...by jonathan harrocks Joystick sprite: steer a rocket round a boxA little rocket you fly round a box with the Joystick widget, on the LCDWIKI ES3C35P (3.5", ESP32-S3, touch). ...by jonathan harrocks Block Explorer (unofficial)I wanted to know how much of a real, online gadget could be built without writing a line of code or paying for...by jonathan harrocks

Clone any of them into the designer, or see every design for this board in the gallery.

From the blog

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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