ESP32-S2-WROOM vs ESP32-WROOM-32E

ESP32-S2-WROOM

WROOM · ESP32-S2 · Active

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ESP32-WROOM-32E

WROOM · ESP32 · Active

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Every figure here is checked against Espressif’s official datasheets. We’ve taken every care to keep it accurate — but datasheets are dense and mistakes happen, so if something looks off, please report it.

Which should you choose?

These run different SoCs (ESP32-S2 vs ESP32), so they differ in CPU, wireless and peripherals — not just packaging.

Choose ESP32-S2-WROOM if you need

native USB-OTG — act as a USB device/host without a USB-UART chip
more usable GPIO (37 vs 26)

Choose ESP32-WROOM-32E if you need

Bluetooth LE
2 CPU cores vs 1 — more headroom for RTOS / parallel work
PSRAM for camera frames, audio buffers and LVGL/large displays
larger flash option (up to 16 MB) for bigger firmware and OTA
Ethernet MAC for wired networking (add an external PHY)

Size, to scale

ESP32-S2-WROOM — 18×31 mm
ESP32-WROOM-32E — 18×25.5 mm

Spec differences at a glance

CPU: ESP32-S2-WROOM Xtensa LX7, 1-core · ESP32-WROOM-32E Xtensa LX6, 2-core
SRAM: ESP32-S2-WROOM 320 KB · ESP32-WROOM-32E 520 KB
ROM: ESP32-S2-WROOM 128 KB · ESP32-WROOM-32E 448 KB
Flash options: ESP32-S2-WROOM 4 MB · ESP32-WROOM-32E 4 / 8 / 16 MB
PSRAM: ESP32-S2-WROOM None · ESP32-WROOM-32E 2 MB (quad)
Co-processor: ESP32-S2-WROOM ULP-RISC-V · ESP32-WROOM-32E ULP-FSM
Bluetooth: ESP32-S2-WROOM — · ESP32-WROOM-32E BT Classic + BLE
Usable GPIO: ESP32-S2-WROOM 37 · ESP32-WROOM-32E 26
ADC: ESP32-S2-WROOM 20× 12-bit · ESP32-WROOM-32E 18× 12-bit
USB: ESP32-S2-WROOM USB-OTG · ESP32-WROOM-32E USB-Serial(external)
UART / SPI / I²C / I²S: ESP32-S2-WROOM 2 / 2 / 2 / 1 · ESP32-WROOM-32E 3 / 2 / 2 / 2
SD/MMC: ESP32-S2-WROOM No · ESP32-WROOM-32E Yes
Ethernet MAC: ESP32-S2-WROOM No · ESP32-WROOM-32E Yes
Touch: ESP32-S2-WROOM 14 · ESP32-WROOM-32E 10
Deep sleep: ESP32-S2-WROOM — µA · ESP32-WROOM-32E 10 µA
Dimensions: ESP32-S2-WROOM 18 × 31 × 3.3 mm · ESP32-WROOM-32E 18 × 25.5 × 3.1 mm
Pin count: ESP32-S2-WROOM 42 · ESP32-WROOM-32E 38
Crypto: ESP32-S2-WROOM AES, SHA, RSA, HMAC, RNG · ESP32-WROOM-32E AES, SHA, RSA, RNG
Digital signature: ESP32-S2-WROOM Yes · ESP32-WROOM-32E No

Compute & memory

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	ESP32-S2-WROOM	ESP32-WROOM-32E
CPU≠	Xtensa LX7, 1-core	Xtensa LX6, 2-core
Max clock	240 MHz	240 MHz
SRAM≠	320 KB	520 KB
ROM≠	128 KB	448 KB
Flash options≠	4 MB	4 / 8 / 16 MB
PSRAM≠	None	2 MB (quad)
Co-processor≠	ULP-RISC-V	ULP-FSM

Wireless

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	ESP32-S2-WROOM	ESP32-WROOM-32E
Wi-Fi	Wi-Fi 4	Wi-Fi 4
Wi-Fi bands	2.4GHz	2.4GHz
Bluetooth≠	—	BT Classic + BLE
802.15.4 (Thread/Zigbee)	No	No
Antenna	PCB	PCB

Peripherals & I/O

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	ESP32-S2-WROOM	ESP32-WROOM-32E
Usable GPIO≠	37	26
ADC≠	20× 12-bit	18× 12-bit
USB≠	USB-OTG	USB-Serial(external)
UART / SPI / I²C / I²S≠	2 / 2 / 2 / 1	3 / 2 / 2 / 2
TWAI (CAN)	Yes	Yes
SD/MMC≠	No	Yes
Ethernet MAC≠	No	Yes
Touch≠	14	10

Power

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	ESP32-S2-WROOM	ESP32-WROOM-32E
Operating voltage	3.0-3.6 V	3.0-3.6 V
Deep sleep≠	— µA	10 µA

Physical

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	ESP32-S2-WROOM	ESP32-WROOM-32E
Dimensions≠	18 × 31 × 3.3 mm	18 × 25.5 × 3.1 mm
Pin count≠	42	38
Temp range	-40 to 85 °C	-40 to 85 °C
Mounting	SMD castellated	SMD castellated
Lifecycle	Active	Active

Security

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	ESP32-S2-WROOM	ESP32-WROOM-32E
Secure boot	Yes	Yes
Flash encryption	Yes	Yes
Crypto≠	AES, SHA, RSA, HMAC, RNG	AES, SHA, RSA, RNG
Digital signature≠	Yes	No
TRNG	Yes	Yes