EspressifSpec only

ESP32-S31 Function CoreBoard

A compact reference board for Espressif's high-performance wireless RISC-V MCU, with modern radio and peripheral coverage.

Best forEvaluating the S31 and building connected voice, vision, or HMI prototypes.

MCUESP32-S31
Architecture32-bit RISC-V
ClockUp to 320 MHz
PSRAMUp to 16 MB in-package
01

Overview

Capabilities at a glance.

01LCD / camera
02JPEG codec
03Audio DSP
04CAN FD
05SDIO
06Touch sensing

Good for

Vision endpointVoice interfaceMatter bridgeIndustrial HMI
02

Hardware

Compute

Dual high-performance RISC-V cores

Low power

Dedicated 40 MHz LP RISC-V core

Imaging

LCD/camera interface, JPEG and pixel accelerators

Audio

I²S interfaces and sample-rate conversion

Industrial

CAN FD and 1000 Mbps Ethernet MAC

Debug

USB Serial/JTAG controller

03

Software

A known starting point.

ESP-IDFESP DevKitsESP-VISIONLVGLFreeRTOS
Primary sourceEspressif S31 documentation
04

Agent notes

Tell the agent
what matters.

  1. 01

    Set the ESP-IDF target to esp32s31 and confirm component support before reusing ESP32-S3 examples.

  2. 02

    The S31 is newer than the S3; ask the agent to verify APIs against the installed ESP-IDF version.

  3. 03

    Plan flash, PSRAM, and pin assignments from the exact module or board variant—not the SoC family alone.

Build with this board

All projects
03Advanced

Make existing devices legible

Matter Bridge

A small bridge that exposes an existing sensor or actuator through a consistent Matter model.

Open project
05Starter

Observe the physical world

Sensor Hub

A dependable local hub that samples several sensors and exposes clean, timestamped readings.

Open project
04Intermediate

Useful information, quietly present

AI Smart Display

A focused ambient display for a few live signals, one conversational action, and clear physical feedback.

Open project