ESP32-S3-WROOM-2 vs ESP8684-WROOM-01C

ESP32-S3-WROOM-2

WROOM · ESP32-S3 · Active

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ESP8684-WROOM-01C

WROOM · ESP32-C2 · Active

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Figures here are compiled from Espressif's official datasheets, with the source linked on each page. Mistakes are possible, so if something looks off, please report it.

Which should you choose?

These run different SoCs (ESP32-S3 vs ESP32-C2), so they differ in CPU, wireless and peripherals, not just packaging.

Choose ESP32-S3-WROOM-2 if you need

2 CPU cores vs 1: more headroom for RTOS / parallel work
faster CPU (240 MHz, Xtensa LX7)
vector / AI acceleration for on-device ML and DSP
PSRAM for camera frames, audio buffers and LVGL/large displays
larger flash option (up to 32 MB) for bigger firmware and OTA

Choose ESP8684-WROOM-01C if you need

smaller footprint (16×24 mm)

Size, to scale

ESP32-S3-WROOM-2: 18×25.5 mm
ESP8684-WROOM-01C: 16×24 mm

Spec differences at a glance

CPU: ESP32-S3-WROOM-2 Xtensa LX7, 2-core · ESP8684-WROOM-01C RISC-V, 1-core
Max clock: ESP32-S3-WROOM-2 240 MHz · ESP8684-WROOM-01C 120 MHz
SRAM: ESP32-S3-WROOM-2 512 KB · ESP8684-WROOM-01C 272 KB
ROM: ESP32-S3-WROOM-2 384 KB · ESP8684-WROOM-01C 576 KB
Flash options: ESP32-S3-WROOM-2 16 / 32 MB · ESP8684-WROOM-01C 2 / 4 MB
PSRAM: ESP32-S3-WROOM-2 8 / 16 MB (octal) · ESP8684-WROOM-01C None
Co-processor: ESP32-S3-WROOM-2 ULP-RISC-V · ESP8684-WROOM-01C none
Usable GPIO: ESP32-S3-WROOM-2 33 · ESP8684-WROOM-01C 14
ADC: ESP32-S3-WROOM-2 20× 12-bit · ESP8684-WROOM-01C 5× 12-bit
USB: ESP32-S3-WROOM-2 USB-OTG · ESP8684-WROOM-01C USB-Serial(external)
UART / SPI / I²C / I²S: ESP32-S3-WROOM-2 3 / 2 / 2 / 2 · ESP8684-WROOM-01C 2 / 1 / 1 / 0
TWAI (CAN): ESP32-S3-WROOM-2 Yes · ESP8684-WROOM-01C No
SD/MMC: ESP32-S3-WROOM-2 Yes · ESP8684-WROOM-01C No
Touch: ESP32-S3-WROOM-2 14 · ESP8684-WROOM-01C 0
Deep sleep: ESP32-S3-WROOM-2 7 µA · ESP8684-WROOM-01C 5 µA
Dimensions: ESP32-S3-WROOM-2 18 × 25.5 × 3.1 mm · ESP8684-WROOM-01C 16 × 24 × 3.1 mm
Pin count: ESP32-S3-WROOM-2 41 · ESP8684-WROOM-01C 23
Temp range: ESP32-S3-WROOM-2 -40 to 65 °C · ESP8684-WROOM-01C -40 to 105 °C
Crypto: ESP32-S3-WROOM-2 AES, SHA, RSA, HMAC, RNG · ESP8684-WROOM-01C ECC, SHA, RNG
Digital signature: ESP32-S3-WROOM-2 Yes · ESP8684-WROOM-01C No

Compute & memory

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	ESP32-S3-WROOM-2	ESP8684-WROOM-01C
CPU≠	Xtensa LX7, 2-core	RISC-V, 1-core
Max clock≠	240 MHz	120 MHz
SRAM≠	512 KB	272 KB
ROM≠	384 KB	576 KB
Flash options≠	16 / 32 MB	2 / 4 MB
PSRAM≠	8 / 16 MB (octal)	None
Co-processor≠	ULP-RISC-V	none

Wireless

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	ESP32-S3-WROOM-2	ESP8684-WROOM-01C
Wi-Fi	Wi-Fi 4	Wi-Fi 4
Wi-Fi bands	2.4GHz	2.4GHz
Bluetooth	BLE 5.x	BLE 5.x
802.15.4 (Thread/Zigbee)	No	No
Antenna	PCB	PCB

Peripherals & I/O

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	ESP32-S3-WROOM-2	ESP8684-WROOM-01C
Usable GPIO≠	33	14
ADC≠	20× 12-bit	5× 12-bit
USB≠	USB-OTG	USB-Serial(external)
UART / SPI / I²C / I²S≠	3 / 2 / 2 / 2	2 / 1 / 1 / 0
TWAI (CAN)≠	Yes	No
SD/MMC≠	Yes	No
Ethernet MAC	No	No
Touch≠	14	0

Power

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	ESP32-S3-WROOM-2	ESP8684-WROOM-01C
Operating voltage	3.0-3.6 V	3.0-3.6 V
Deep sleep≠	7 µA	5 µA

Physical

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	ESP32-S3-WROOM-2	ESP8684-WROOM-01C
Dimensions≠	18 × 25.5 × 3.1 mm	16 × 24 × 3.1 mm
Pin count≠	41	23
Temp range≠	-40 to 65 °C	-40 to 105 °C
Mounting	SMD castellated	SMD castellated
Lifecycle	Active	Active

Security

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	ESP32-S3-WROOM-2	ESP8684-WROOM-01C
Secure boot	Yes	Yes
Flash encryption	Yes	Yes
Crypto≠	AES, SHA, RSA, HMAC, RNG	ECC, SHA, RNG
Digital signature≠	Yes	No
TRNG	Yes	Yes