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ESP32 S31 Industrial AI 4.3inch LCD 800x480 4.3 inch TouchScreen Display Development Board LVGL CAN I2C RS485 DeepSeek
$59.9
ESP32-S3 4.3-inch LCD Smart Voice Touchscreen Development Board, Dual-core RISC-V 320MHz, 5-point Capacitive Touch, Dual MIC AI Voice, Wi-Fi 6 / Bluetooth 5.4
ESP32-S31
4.3-inch Smart Voice Touchscreen Board
Integrated with capacitive touch, high-definition LCD, and audio codec chip
Supports voice playback and recording, creating a smarter human-machine interaction experience.
Version selection
Product features
The ESP32-S31-Touch-LCD-4.3C is a touchscreen development board designed based on the ESP32-S31-WROOM-3 module. It integrates an 800×480 RGB display, capacitive touch, audio, motion sensing, and industrial communication interfaces, targeting smart control panels, equipment monitoring terminals, and IoT human-machine interaction applications.
- Powered by a high-performance dual-core 32-bit RISC-V microcontroller with a clock speed of up to 320 MHz.
- Supports 128-bit SIMD instructions, with integrated JPEG codec, PPA, and 2D-DMA hardware acceleration.
- Supports 2.4 GHz Wi-Fi 6, Bluetooth 5.4 LE, Classic Bluetooth, and IEEE 802.15.4, with an onboard antenna.
- Supports Thread, Zigbee, and Bluetooth Mesh 1.1, facilitating smart home networking.
- Built-in 512 KB SRAM and 320 KB ROM, equipped with 16 MB Flash and 16 MB PSRAM.
- Onboard 4.3-inch LCD capacitive touchscreen, 800 × 480 resolution, 65K colors.
- Uses the GT911 capacitive touch controller, supporting I2C communication, 5-point touch, and touch interrupt.
- Supports LVGL graphical interface development and PWM backlight brightness adjustment.
- Onboard ES8389 audio codec, dual microphone inputs, and speaker amplifier circuit, facilitating the development of recording, voice announcement, and networked voice interaction applications.
- Onboard voltage regulator, supporting a wide input voltage range of 7–36 V.
- Onboard lithium battery charging circuit and BQ27220 fuel gauge, supporting charging and battery level monitoring.
- Onboard RTC chip and backup battery holder; with a backup battery installed, timekeeping is maintained when the main power supply is disconnected.
- Supports RS485 half-duplex communication and CAN-FD, facilitating connection to field devices.
- Supports TF card storage and has an onboard 6-axis IMU, facilitating resource storage, data logging, and motion sensing.
- Exposes a native USB interface, with USB Host support and an external USB camera display example provided.
- Exposes I2C and 6 GPIO pins for easy expansion with sensors and external devices.
- Onboard power and charging status indicator lights for easily checking the power supply and battery charging status.
- The chip supports secure boot, Flash/PSRAM encryption, and TEE/APM security isolation.
- Provides 16 examples covering display, touch, audio, and major peripherals, facilitating secondary development.
Note: LE Audio, Thread, Zigbee, Mesh, and security features require the corresponding SDK and firmware; the native USB is a separate interface, while the onboard Type-C is used for power supply, program download, and serial debugging.
IPS display panel
Excellent display performance with a viewing angle of 160°.
Capacitive 5-point touch
Light touch, what you see is what you get — flexible operation for multi-point UI interaction.
The touch function is exposed via I2C signals and supports 5-point touch.
Supports AI voice interaction
Supports mainstream AI platforms and can connect to online large-model platforms such as Doubao, DeepSeek, etc.
Supports expansion with a variety of peripherals.
More expansion devices can be connected via interfaces such as USB adapter cables, I2C, CAN-FD, RS485, and GPIO.
Application scenarios
Images are for illustration only. Please refer to the configuration list for detailed specifications.
Resource overview
- ESP32-S31-WROOM-3-N16R16
Wi-Fi and Bluetooth SoC module, 320MHz clock speed, equipped with 16MB PSRAM and 16MB Flash.
- TF card slot
- USB Type-C port
- BOOT
Press and hold while powering on to enter program flashing mode.
- RESET
Press to reset the controller.
- USB Host interface
MX1.25 4-pin connector
- Screen touch connector terminal
- 4.3-inch screen connector terminal
- 8Ω 2W speaker
- Power switch
ON: power on; OFF: power off.
- 3.7V single-cell lithium battery connector
MX1.25 2-pin straight connector
- Indicator light
USER：User-defined indicator light;
CHG：Lithium battery charging indicator light；
PWR：Power indicator light - 7–36V DC power input connector
- I2C interface
VOUT output 5V/3.3V
(selectable via onboard resistor, one of the two) - CAN-FD
- RS485
- GPIO 48 ～ GPIO 53
ESP32-S31 native IO
- RTC battery holder
Specification: CR927
- Microphone
- Termination resistor switch
Interface overview
Can accommodate a battery of 60 × 30 × 6 mm (length × width × thickness).
The ESP32-S31-Touch-LCD-4.3C-BOX version has a built-in lithium battery.
Upgraded version installation method
