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Scan for outdated or missing drivers - takes under a minuteDriver Scan →Repair Windows errors before they cause bigger problemsFix Now →The ESP32-S31 is the ESP32 chip that matches the headline’s combination: Espressif lists 2.4 GHz Wi-Fi 6 and a 1000 Mbps Ethernet peripheral, alongside Bluetooth, Thread, Zigbee and multimedia interfaces. It is a capable embedded system-on-chip, not a ready-to-use consumer device—and its current documentation says it is supported only on the ESP-IDF master branch v6.1 and later.
What makes the ESP32-S31 different?
Espressif describes the ESP32-S31 as a dual-core, 32-bit RISC-V system-on-chip. Its high-performance core is specified to run at up to 320 MHz, and the chip includes 512 KB of RAM. The standout change is not simply a faster processor: the feature set combines newer wireless networking with wired gigabit Ethernet and interfaces for multimedia applications.
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The ESP32 family spans chips with different processors, radios and peripherals, so “the ESP32 that used to blink LEDs” is a shorthand for the family’s maker-project roots, not a description of every earlier model. The S31’s listed capabilities point toward more demanding connected devices and gateways as well as conventional embedded projects.
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ESP32-S31 specifications
| Feature | ESP32-S31 specification |
|---|---|
| Processor | Dual-core, 32-bit RISC-V; high-performance core up to 320 MHz |
| On-chip RAM | 512 KB |
| Memory expansion | Supports 250 MHz, 8-bit DDR PSRAM |
| Wi-Fi | 2.4 GHz Wi-Fi 6 |
| Bluetooth and mesh-related radios | BLE 5.4, Bluetooth Classic, Thread 1.4 and Zigbee 3.0 |
| Ethernet | 1000 Mbps peripheral |
| USB and display-related interfaces | USB OTG 2.0 High Speed, 16-bit DVP and 24-bit RGB |
| Other multimedia features | PPA and JPEG codec |
These are manufacturer-listed specifications in Espressif’s ESP32-S31 documentation; the documentation page does not state a publication date. They are not independent measurements of real-world performance.
#1 Best Overall
- 2.4GHz Dual Mode WiFi + Bluetooth Development Board
- Support LWIP protocol, Freertos
- SupportThree Modes: AP, STA, and AP+STA
- Ultra-Low power consumption, Compatible with Arduino IDE
- ESP32 is a safe, reliable, and scalable to a variety of applications
Does the ESP32-S31 have 5 GHz Wi-Fi?
Espressif’s accessible feature list specifies 2.4 GHz Wi-Fi 6. It does not establish 5 GHz operation, so do not assume that “Wi-Fi 6” means this chip can connect on the 5 GHz band. Check the exact radio requirements of a design against the chip documentation before choosing it.
What does gigabit Ethernet mean in practice?
The listed 1000 Mbps figure describes the Ethernet peripheral’s nominal link rate, not guaranteed application throughput. Actual performance depends on the full design, including the network path, board implementation, software and workload. No independent throughput benchmark is established here, so the specification should not be read as a measured speed for a finished product.
Rank #2
- Dual-Core Performance Up to 240 MHz: Run sensor processing, wireless communication, automation logic and connected-device tasks on a 32-bit dual-core ESP32 platform designed for responsive embedded and IoT projects
- Built-in Wi-Fi and Bluetooth 4.2: Connect to 2.4 GHz Wi-Fi networks or use Bluetooth Classic and BLE for wireless sensors, smart devices, remote controls, home automation and other connected projects
- Flexible Power-Saving Modes: ESP32 power-management features support dynamic clock scaling and low-power operating modes, helping developers reduce energy use in compatible sensing, monitoring and connected-device applications, suitable for battery-powered Internet of Things (IoT) devices.
- USB-C Programming with CP2102: Connect through USB-C for power, sketch uploads and serial monitoring, while GPIO, UART, SPI and I2C interfaces support sensors, displays, motor drivers and other modules (USB-C cable not included)
- Over-the-Air Update Support: Configure OTA functionality through a compatible ESP-32 software framework to update deployed firmware over Wi-Fi without reconnecting the board by USB for every revision
The combination is useful when a device needs both wireless connectivity and a wired network option—for example, a gateway or fixed smart-home device. The chip’s USB, display and JPEG capabilities also make it relevant to multimedia-oriented embedded designs. Espressif identifies multimedia, edge AI, gateways, smart-home hubs, video doorbells and voice-control devices as application categories; those are vendor use cases, not proof of a particular performance level.
How it compares with ESP32-C6 and ESP32-E22
| Part | What the cited Espressif information establishes | How it differs from the S31 |
|---|---|---|
| ESP32-S31 | Dual-core RISC-V, high-performance core up to 320 MHz, 2.4 GHz Wi-Fi 6, 1000 Mbps Ethernet, BLE 5.4, Bluetooth Classic, Thread 1.4, Zigbee 3.0 and multimedia interfaces | The chip matching the combination of Wi-Fi 6 and listed gigabit Ethernet |
| ESP32-C6 | Espressif’s first Wi-Fi 6 SoC, with 2.4 GHz Wi-Fi 6, Bluetooth LE and IEEE 802.15.4 for Thread and Zigbee applications | Its product page does not describe the S31’s listed 1000 Mbps Ethernet and multimedia feature set. See Espressif’s ESP32-C6 page. |
| ESP32-E22 | A tri-band Wi-Fi 6E connectivity co-processor announced January 19, 2026; Espressif announced Wi-Fi 6E certification and an open-source Linux driver on June 12, 2026 | A separate connectivity co-processor, not an S31-style MCU. See the announcement and certification and driver update. |
The comparison is about the capabilities established on the cited product pages; it does not imply that unlisted features are impossible. The E22’s 6E radio role is distinct from the S31’s integrated embedded-computing focus.
Rank #3
- Powerful ESP-32 Board: Unlock the world of Internet of Things (IoT) and advanced electronics with the heart of this kit: the ESP-32 board. It features a powerful dual-core processor, integrated Wi-Fi and Bluetooth 4.2, making it perfect for building connected, smart devices that communicate with your phone or the cloud. It's fully compatible with the Arduino IDE for easy programming.
- Super Starter Kit: This kit contains over 35 different modules and electronic components, including sensors, displays, motors, and input devices. From LEDs and buttons to an OLED screen, servo motor, and keypad, you have everything needed to explore a vast range of projects in one box.
- Step by Step Online Tutorial: Jump right in with our detailed, beginner-friendly tutorial. Access 30+ projects with complete code, clear circuit diagrams, and step-by-step instructions. Learn the fundamentals of electronics, coding, and how to utilize the ESP-32's unique capabilities without any prior experience.
- Hands-on Learning for All Skill Levels: Perfect for students, makers, engineers, and hobbyists. Start with basic circuits and coding, then progress to intermediate and advanced IoT applications. Build practical projects like weather stations, smart home controllers, remote-controlled devices, and interactive gadgets. The skills you learn are the foundation for real-world innovation.
- Quality & Great Support: Elegoo is committed to quality. We provide a clear, detailed tutorial guide, refined code, and a well-organized component kit. All modules are carefully selected for reliability and ease of use. Our dedicated technical support team and active online community are ready to help you succeed in your learning journey.
Developer support: check the ESP-IDF branch first
Espressif’s current S31 documentation says the chip is supported only on the ESP-IDF master branch v6.1 and later. That is a significant toolchain consideration: do not assume that a released stable ESP-IDF version supports the S31 unless the relevant release documentation confirms it.
- For evaluation, verify that your required ESP-IDF branch and project dependencies support the S31 before committing to a firmware design.
- For a production product, account for the implications of relying on master-branch support, including the need to validate the exact toolchain and maintain a known-good development environment.
- Confirm that the software supports the specific radios and peripherals your design needs; the chip’s hardware feature list alone does not establish software readiness for every use.
Should you start with a board, module or bare chip?
For first evaluation, a development board is generally the most direct route. Espressif describes development boards as complete printed circuit boards with power and download circuitry, intended for testing, debugging and firmware flashing. The cited documentation does not establish a named S31 board model.
Rank #4
- 2.4GHz Dual Mode WiFi + Bluetooth Development Board
- Support LWIP protocol, Freertos;ESP32 is a safe, reliable, and scalable to a variety of applications
- SupportThree Modes: AP, STA, and AP+STA
- Ultra-Low power consumption, Compatible with Arduino IDE
- 1PCS 30Pin ESP32 Development Board 2.4GHz WiFi Dual Cores Microcontroller Integrated with Antenna RF Low Noise Amplifiers Filters
- Development board: Choose this to get a working platform for firmware experiments without first designing the supporting hardware.
- Module: A module can include components such as flash, PSRAM and antenna circuitry, reducing integration work—particularly around the radio portion of a custom design.
- Bare chip: This provides the most control over the hardware design, but requires external startup circuitry and more RF integration work, including certification considerations.
No official S31 launch date, price, mass-production status or retail availability is established by the cited documentation. Check current manufacturer and distributor information before planning a purchase or product schedule.
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Who should consider the ESP32-S31?
The S31 is worth evaluating when a design can use its particular mix of a 2.4 GHz Wi-Fi 6 radio, wired 1000 Mbps Ethernet, other listed connectivity standards and multimedia interfaces—and when its current ESP-IDF support status fits the project. It is not automatically the best choice for a simple GPIO project, nor does its Wi-Fi label make it suitable where 5 GHz is a requirement. Selecting it should start with the application’s network bands, wired-link needs, peripherals and software constraints.
Quick Recap
Best Value
- 2.4GHz Dual Mode WiFi + Bluetooth Development Board
- Ultra-Low power consumption, works perfectly with the Arduino IDE
- Support LWIP protocol, Freertos
- SupportThree Modes: AP, STA, and AP+STA
- ESP32 is a safe, reliable, and scalable to a variety of applications
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