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ESP32-S31
High-performance multi-protocol HMI
Dual-core 320 MHz RISC-V with Wi-Fi 6, Bluetooth 5.4, 802.15.4 and 60 GPIOs.
Best for
- Advanced HMI, connected audio and multi-protocol products
Avoid for
- Cost-minimized simple endpoints
CPU & memory
- Architecture
- RISC-V
- Core(s)
- 2
- Maximum clock
- 320 MHz
- On-chip SRAM
- 512 KB
- ROM
- Not confirmed
- Flash
- External or in-package by part
- PSRAM
- External DDR support
- Packages
- QFN80 8×8 mm
Wireless
- Wi-Fi
- 2.4 GHz Wi-Fi 6
- Wi-Fi max rate
- 150 Mbps
- Bluetooth
- Bluetooth 5.4 LE + Bluetooth Classic
- IEEE 802.15.4
- Yes
Interfaces
- USB OTG
- high-speed
- USB Serial/JTAG
- Yes
- Ethernet MAC
- Yes
- Camera
- Yes
- Display
- Yes
- SD/MMC
- Yes
- Maximum GPIO
- 60
Security
- Secure boot
- Yes
- Flash encryption
- Yes
- Crypto accelerators
- AES · ECC · HMAC · RSA · SHA · RSA_DS · ECDSA_DS · TRNG
- TEE / APM
- Yes
Analog & power
- ADC channels
- 16
- ADC resolution
- 12-bit
- Touch sensing
- Yes
- Touch channels
- Not confirmed
- Supply voltage
- 2.7–3.6 V
- ULP core
- ULP-RISC-V
- Deep-sleep current
- Not confirmed
Lifecycle & timing
- Announced
- Not confirmed
- Mass production
- 2026-07-27
- NRND
- Not confirmed
- EOL
- Not confirmed
Official modules
Every official ESP32 base module, grouped by series. Status follows the ordering codes; "Mixed" means they differ.
| Module | Status | Form factor | Antenna | Flash | PSRAM |
|---|---|---|---|---|---|
| ESP32-S31-WROOM-1 | Officially listed | WROOM | PCB | Not confirmed | Not confirmed |
| ESP32-S31-WROOM-3 | Officially listed | WROOM | PCB | Not confirmed | Not confirmed |
Official development boards
Official Espressif development boards, including discontinued boards from the per-series EOL lists.
| Board | Status | Board type |
|---|---|---|
| ESP32-S31-Function-CoreBoard-1 | Officially listed | Function EV board |
| ESP32-S31-Korvo-1 | Officially listed | Korvo |
Where to buy
Official page and distributor search
These are search and official pages, not live stock or price quotes. Confirm the exact ordering code with the seller.
Official chip ordering codes
Each row is an official SoC or SiP. Buy links search that exact part name.
| Part | Status | Package | Flash | PSRAM | Buy |
|---|---|---|---|---|---|
| ESP32-S31NRV16 | Mass production | QFN80 | See datasheet | None confirmed | Search LCSCSearch Digi-KeySearch Mouser |
| ESP32-S31NRV32 | Mass production | QFN80 | See datasheet | None confirmed | Search LCSCSearch Digi-KeySearch Mouser |
Chip package
Chip pin map
Package top view from the official series datasheet. Filter pins or open the accessible table. This is a reference map, not an electrical simulator.
Complete accessible pin table
| Physical pin | Label | Functions | Direction | Warnings |
|---|---|---|---|---|
| 1 | ANT | Input | — | |
| 2 | VDDA3 | Power | — | |
| 3 | VDDA4 | Power | — | |
| 4 | CHIP_PU | Input | Enable pin. Do not leave it floating; follow the datasheet power-up circuit. | |
| 5 | XTAL_32K_N/GPIO0, GPIO Matrix | Input | — | |
| 6 | XTAL_32K_P/GPIO1, GPIO Matrix | Input | — | |
| 7 | GPIO2, GPIO Matrix | Bidirectional | — | |
| 8 | GPIO3, GPIO Matrix | Bidirectional | — | |
| 9 | GPIO4, GPIO Matrix | Bidirectional | — | |
| 10 | GPIO5, GPIO Matrix | Bidirectional | — | |
| 11 | VDDPST_1 | Power | — | |
| 12 | GPIO6, GPIO Matrix | Bidirectional | — | |
| 13 | GPIO7, GPIO Matrix | Bidirectional | — | |
| 14 | GPIO8, GPIO Matrix | Bidirectional | — | |
| 15 | GPIO9, GPIO Matrix | Bidirectional | — | |
| 16 | GPIO10, GPIO Matrix | Bidirectional | — | |
| 17 | GPIO11, GPIO Matrix | Bidirectional | — | |
| 18 | VREF_TOUCH | Input | — | |
| 19 | GPIO12, GPIO Matrix | Bidirectional | — | |
| 20 | GPIO13, GPIO Matrix | Bidirectional | — | |
| 21 | GPIO14, GPIO Matrix | Bidirectional | — | |
| 22 | GPIO15, GPIO Matrix | Bidirectional | — | |
| 23 | GPIO16, GPIO Matrix | Bidirectional | — | |
| 24 | GPIO17, GPIO Matrix | Bidirectional | — | |
| 25 | GPIO18, GPIO Matrix | Bidirectional | — | |
| 26 | GPIO19, GPIO Matrix | Bidirectional | — | |
| 27 | SDIO_DATA0 | Bidirectional | — | |
| 28 | SDIO_DATA1 | Bidirectional | — | |
| 29 | SDIO_DATA2 | Bidirectional | — | |
| 30 | VDD_PSRAM_1P8_1 | Power | — | |
| 31 | SDIO_DATA3 | Bidirectional | — | |
| 32 | SDIO_CLK | Bidirectional | — | |
| 33 | SDIO_CMD | Bidirectional | — | |
| 34 | VDD_PSRAM_1P8_2 | Power | — | |
| 35 | VDD_LDO_1P8 | Power | — | |
| 36 | SPICS | Bidirectional | This signal may be reserved by in-package flash or PSRAM on some ordering codes. | |
| 37 | SPIQ | Bidirectional | This signal may be reserved by in-package flash or PSRAM on some ordering codes. | |
| 38 | SPIWP | Bidirectional | This signal may be reserved by in-package flash or PSRAM on some ordering codes. | |
| 39 | VDD_SPI | Power | — | |
| 40 | SPIHD | Bidirectional | This signal may be reserved by in-package flash or PSRAM on some ordering codes. | |
| 41 | SPICLK | Bidirectional | This signal may be reserved by in-package flash or PSRAM on some ordering codes. | |
| 42 | SPID | Bidirectional | This signal may be reserved by in-package flash or PSRAM on some ordering codes. | |
| 43 | VCCA/VDDPST_2 | Power | — | |
| 44 | USB_DP | Bidirectional | — | |
| 45 | USB_DM | Bidirectional | — | |
| 46 | GPIO33, GPIO Matrix | Bidirectional | — | |
| 47 | GPIO34, GPIO Matrix | Bidirectional | — | |
| 48 | GPIO35, GPIO Matrix | Bidirectional | — | |
| 49 | GPIO36, GPIO Matrix | Bidirectional | — | |
| 50 | GPIO37, GPIO Matrix | Bidirectional | — | |
| 51 | GPIO38, GPIO Matrix | Bidirectional | — | |
| 52 | GPIO39, GPIO Matrix | Bidirectional | — | |
| 53 | GPIO40, GPIO Matrix | Bidirectional | — | |
| 54 | VDDPST_3 | Power | — | |
| 55 | GPIO42, GPIO Matrix | Bidirectional | — | |
| 56 | GPIO43, GPIO Matrix | Bidirectional | — | |
| 57 | GPIO44, GPIO Matrix | Bidirectional | — | |
| 58 | GPIO45, GPIO Matrix | Bidirectional | — | |
| 59 | GPIO46, GPIO Matrix | Bidirectional | — | |
| 60 | GPIO47, GPIO Matrix | Bidirectional | — | |
| 61 | GPIO48, GPIO Matrix | Bidirectional | — | |
| 62 | GPIO49, GPIO Matrix | Bidirectional | — | |
| 63 | VREF_ADC | Input | — | |
| 64 | VDDPST_4 | Power | — | |
| 65 | GPIO50, GPIO Matrix | Bidirectional | — | |
| 66 | GPIO51, GPIO Matrix | Bidirectional | — | |
| 67 | GPIO52, GPIO Matrix | Bidirectional | — | |
| 68 | GPIO53, GPIO Matrix | Bidirectional | — | |
| 69 | MTDO | Bidirectional | JTAG and boot-related function. Verify the part-specific reset configuration. | |
| 70 | MTCK | Bidirectional | JTAG and boot-related function. Verify the part-specific reset configuration. | |
| 71 | MTDI | Bidirectional | JTAG and boot-related function. Verify the part-specific reset configuration. | |
| 72 | MTMS | Bidirectional | JTAG and boot-related function. Verify the part-specific reset configuration. | |
| 73 | GPIO58, GPIO Matrix | Bidirectional | — | |
| 74 | GPIO59, GPIO Matrix | Bidirectional | — | |
| 75 | GPIO60, GPIO Matrix | Bidirectional | — | |
| 76 | GPIO61, GPIO Matrix | Bidirectional | — | |
| 77 | VDDA1 | Power | — | |
| 78 | XTAL_N | Input | — | |
| 79 | XTAL_P | Input | — | |
| 80 | VDDA2 | Power | — | |
| 81 | GND | Power | — |
Official evidence
Official source: ESP32-S31 product page Official source: ESP32-S31 Mass Production Datasheet: ESP32-S31 Series Datasheet
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