ESP32-S31 Development Boards Unveiled for IoT, Smart Audio, and HMI Applications

Key Takeaways

• ESP32‑S31 adds dual RISC‑V cores, Wi‑Fi 6, Gigabit Ethernet.
• Function‑CoreBoard‑1 offers Ethernet, USB OTG, mono audio codec.
• Korvo‑1 includes dual mics, 4.3‑inch LCD, 3 MP camera.
• Both boards support ESP‑IDF master branch for early‑stage features.
• Target markets: low‑cost IoT, smart audio, HMI devices.

Pulse Analysis

4 radios. At 320 MHz the high‑performance core delivers SIMD and floating‑point acceleration, while the low‑power core handles background tasks, extending battery life for edge devices. Integrated Gigabit Ethernet and generous memory—512 KB SRAM plus up to 16 MB PSRAM—position the chip for bandwidth‑intensive applications such as video streaming, industrial gateways, and AI‑enhanced sensors.

Espressif’s two development kits translate that silicon capability into ready‑to‑build platforms. The Function‑CoreBoard‑1 focuses on wired connectivity, offering a Gigabit Ethernet port, USB‑OTG, and a mono audio codec with a 3 W Class‑D amplifier—ideal for smart‑meter, gateway, or low‑cost voice‑assistant prototypes. 3‑inch LCD, and a 3 MP camera, creating a compact HMI sandbox for voice‑controlled speakers, security cameras, and interactive kiosks. Both boards ship with ESP‑IDF support, letting developers leverage existing libraries and OTA update workflows.

The timing aligns with a surge in edge AI and Matter‑enabled devices, where manufacturers need a single MCU that can handle networking, audio processing, and visual input without multiple chips. MX RT line. Early adopters can expect sample availability within weeks, but full production silicon may lag until late 2026, making the dev kits a strategic bridge for upcoming product launches.