ESP32-S3-WROOM-1 vs ESP8684-WROOM-03

ESP32-S3-WROOM-1

WROOM · ESP32-S3 · Active

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ESP8684-WROOM-03

WROOM · ESP32-C2 · 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-S3 vs ESP32-C2), so they differ in CPU, wireless and peripherals — not just packaging.

Choose ESP32-S3-WROOM-1 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 16 MB) for bigger firmware and OTA

Choose ESP8684-WROOM-03 if you need

smaller footprint (15×17.3 mm)

Size, to scale

ESP32-S3-WROOM-1 — 18×25.5 mm
ESP8684-WROOM-03 — 15×17.3 mm

Spec differences at a glance

CPU: ESP32-S3-WROOM-1 Xtensa LX7, 2-core · ESP8684-WROOM-03 RISC-V, 1-core
Max clock: ESP32-S3-WROOM-1 240 MHz · ESP8684-WROOM-03 120 MHz
SRAM: ESP32-S3-WROOM-1 512 KB · ESP8684-WROOM-03 272 KB
ROM: ESP32-S3-WROOM-1 384 KB · ESP8684-WROOM-03 576 KB
Flash options: ESP32-S3-WROOM-1 4 / 8 / 16 MB · ESP8684-WROOM-03 2 / 4 MB
PSRAM: ESP32-S3-WROOM-1 2 / 8 / 16 MB · ESP8684-WROOM-03 None
Co-processor: ESP32-S3-WROOM-1 ULP-RISC-V · ESP8684-WROOM-03 none
Usable GPIO: ESP32-S3-WROOM-1 36 · ESP8684-WROOM-03 8
ADC: ESP32-S3-WROOM-1 20× 12-bit · ESP8684-WROOM-03 5× 12-bit
USB: ESP32-S3-WROOM-1 USB-OTG · ESP8684-WROOM-03 USB-Serial(external)
UART / SPI / I²C / I²S: ESP32-S3-WROOM-1 3 / 2 / 2 / 2 · ESP8684-WROOM-03 2 / 1 / 1 / 0
TWAI (CAN): ESP32-S3-WROOM-1 Yes · ESP8684-WROOM-03 No
SD/MMC: ESP32-S3-WROOM-1 Yes · ESP8684-WROOM-03 No
Touch: ESP32-S3-WROOM-1 14 · ESP8684-WROOM-03 0
Deep sleep: ESP32-S3-WROOM-1 7 µA · ESP8684-WROOM-03 5 µA
Dimensions: ESP32-S3-WROOM-1 18 × 25.5 × 3.1 mm · ESP8684-WROOM-03 15 × 17.3 × 2.8 mm
Pin count: ESP32-S3-WROOM-1 41 · ESP8684-WROOM-03 11
Temp range: ESP32-S3-WROOM-1 -40 to 85 °C · ESP8684-WROOM-03 -40 to 105 °C
Crypto: ESP32-S3-WROOM-1 AES, SHA, RSA, HMAC, RNG · ESP8684-WROOM-03 ECC, SHA, RNG
Digital signature: ESP32-S3-WROOM-1 Yes · ESP8684-WROOM-03 No

Compute & memory

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	ESP32-S3-WROOM-1	ESP8684-WROOM-03
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≠	4 / 8 / 16 MB	2 / 4 MB
PSRAM≠	2 / 8 / 16 MB	None
Co-processor≠	ULP-RISC-V	none

Wireless

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	ESP32-S3-WROOM-1	ESP8684-WROOM-03
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-1	ESP8684-WROOM-03
Usable GPIO≠	36	8
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-1	ESP8684-WROOM-03
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-1	ESP8684-WROOM-03
Dimensions≠	18 × 25.5 × 3.1 mm	15 × 17.3 × 2.8 mm
Pin count≠	41	11
Temp range≠	-40 to 85 °C	-40 to 105 °C
Mounting	SMD castellated	SMD castellated
Lifecycle	Active	Active

Security

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	ESP32-S3-WROOM-1	ESP8684-WROOM-03
Secure boot	Yes	Yes
Flash encryption	Yes	Yes
Crypto≠	AES, SHA, RSA, HMAC, RNG	ECC, SHA, RNG
Digital signature≠	Yes	No
TRNG	Yes	Yes