Espressif

ESP32-S2 Edge AI Guides

320 KB SRAM with Xtensa LX7 core supports basic ML inference. No Bluetooth limits IoT deployment but USB OTG enables direct sensor connections.

Hardware Specs

Processor	Single-core Xtensa LX7 @ 240 MHz
Cores	1
Clock	240 MHz
SRAM	320 KB
PSRAM	4 MB
Flash	4 MB
FPU	none
Connectivity	Wi-Fi 802.11 b/g/n
Key Features	USB OTG (native), LCD/Camera interface, 14 capacitive touch channels, ULP co-processor (RISC-V based), Hardware crypto acceleration
Price	$2–$4 (chip), $6–$18 (dev board)

Dev Boards in This Family

28 edge-AI-capable ESP32-S2 development boards with specs and compatibility details.

Adafruit Feather ESP32-S2

Adafruit

320 KB RAM · 240 MHz

Adafruit Feather ESP32-S2 Reverse TFT

Adafruit

320 KB RAM · 240 MHz

Adafruit Feather ESP32-S2 TFT

Adafruit

320 KB RAM · 240 MHz

Adafruit FunHouse

Adafruit

320 KB RAM · 240 MHz

Adafruit MagTag 2.9

Adafruit

320 KB RAM · 240 MHz

Adafruit Metro ESP32-S2

Adafruit

320 KB RAM · 240 MHz

Adafruit QT Py ESP32-S2

Adafruit

320 KB RAM · 240 MHz

EspinalLab ATMegaZero ESP32-S2

EspinalLab

320 KB RAM · 240 MHz

Smart Bee Motion

Smart Bee

320 KB RAM · 240 MHz

Deneyap Mini

T3 Foundation

320 KB RAM · 240 MHz

Deneyap Mini v2

T3 Foundation

320 KB RAM · 240 MHz

Franzininho WiFi Board

Franzininho

320 KB RAM · 240 MHz

Espressif ESP32-S2-Kaluga-1 Kit Espressif ESP32-S2-Saola-1 Adafruit ESP32-S2 Feather Development Board Franzininho WiFi Franzininho WiFi MSC WEMOS LOLIN S2 Mini WEMOS LOLIN S2 PICO microS2 Department of Alchemy MiniMain ESP32-S2 Ai-Thinker NodeMCU-32S2 (ESP-12K) senseBox MCU-S2 ESP32-S2 SparkFun ESP32-S2 Thing Plus Unexpected Maker FeatherS2 Unexpected Maker FeatherS2 Neo Unexpected Maker RMP Unexpected Maker TinyS2

Hardware Guides

No hardware guides yet. Use the MCU Checker to explore compatibility.

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ESP32-C6

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512 KB RAM · 160 MHz

ESP32-S3

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512 KB RAM · 240 MHz

GAP8

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512 KB RAM · 250 MHz

i.MX RT1052

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512 KB RAM · 600 MHz

i.MX RT1062

NXP

1024 KB RAM · 600 MHz

i.MX RT1064

NXP

1024 KB RAM · 600 MHz

LPC55xx

NXP

320 KB RAM · 150 MHz

nRF52832

Nordic Semiconductor

64 KB RAM · 64 MHz

nRF52833

Nordic Semiconductor

128 KB RAM · 64 MHz

nRF52840

Nordic Semiconductor

256 KB RAM · 64 MHz

RA6M5

Renesas

512 KB RAM · 200 MHz

SAMD51

Microchip

256 KB RAM · 120 MHz

SAME51

Microchip

256 KB RAM · 120 MHz

STM32F3

STMicroelectronics

80 KB RAM · 72 MHz

STM32F4

STMicroelectronics

192 KB RAM · 168 MHz

STM32F7

STMicroelectronics

512 KB RAM · 216 MHz

STM32G4

STMicroelectronics

128 KB RAM · 170 MHz

STM32H5

STMicroelectronics

640 KB RAM · 250 MHz

STM32H7

STMicroelectronics

1024 KB RAM · 480 MHz

STM32L4

STMicroelectronics

128 KB RAM · 80 MHz

STM32L5

STMicroelectronics

256 KB RAM · 110 MHz

STM32U5

STMicroelectronics

786 KB RAM · 160 MHz

STM32WB

STMicroelectronics

256 KB RAM · 64 MHz

Orchestrate ESP32-S2 Edge AI with ForestHub

The ESP32-S2 runs inference on-device. ForestHub on your Linux edge gateway ingests its results over MQTT, orchestrates the sense-reason-act loop as a deterministic, auditable graph, and acts on the line.

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