ESP32-C3-MINI-1 vs ESP32-WROOM-32E

ESP32-C3-MINI-1

MINI · ESP32-C3 · Active

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ESP32-WROOM-32E

WROOM · ESP32 · 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-C3 vs ESP32), so they differ in CPU, wireless and peripherals, not just packaging.

Choose ESP32-C3-MINI-1 if you need

smaller footprint (13.2×16.6 mm)

Choose ESP32-WROOM-32E if you need

Bluetooth Classic (BR/EDR) for legacy SPP / A2DP audio
2 CPU cores vs 1: more headroom for RTOS / parallel work
faster CPU (240 MHz, Xtensa LX6)
PSRAM for camera frames, audio buffers and LVGL/large displays
larger flash option (up to 16 MB) for bigger firmware and OTA

Size, to scale

ESP32-C3-MINI-1: 13.2×16.6 mm
ESP32-WROOM-32E: 18×25.5 mm

Spec differences at a glance

CPU: ESP32-C3-MINI-1 RISC-V, 1-core · ESP32-WROOM-32E Xtensa LX6, 2-core
Max clock: ESP32-C3-MINI-1 160 MHz · ESP32-WROOM-32E 240 MHz
SRAM: ESP32-C3-MINI-1 400 KB · ESP32-WROOM-32E 520 KB
ROM: ESP32-C3-MINI-1 384 KB · ESP32-WROOM-32E 448 KB
Flash options: ESP32-C3-MINI-1 4 MB · ESP32-WROOM-32E 4 / 8 / 16 MB
PSRAM: ESP32-C3-MINI-1 None · ESP32-WROOM-32E 2 MB (quad)
Co-processor: ESP32-C3-MINI-1 none · ESP32-WROOM-32E ULP-FSM
Bluetooth: ESP32-C3-MINI-1 BLE 5.x · ESP32-WROOM-32E BT Classic + BLE
Usable GPIO: ESP32-C3-MINI-1 15 · ESP32-WROOM-32E 26
ADC: ESP32-C3-MINI-1 6× 12-bit · ESP32-WROOM-32E 18× 12-bit
USB: ESP32-C3-MINI-1 USB-Serial-JTAG · ESP32-WROOM-32E USB-Serial(external)
UART / SPI / I²C / I²S: ESP32-C3-MINI-1 2 / 1 / 1 / 1 · ESP32-WROOM-32E 3 / 2 / 2 / 2
SD/MMC: ESP32-C3-MINI-1 No · ESP32-WROOM-32E Yes
Ethernet MAC: ESP32-C3-MINI-1 No · ESP32-WROOM-32E Yes
Touch: ESP32-C3-MINI-1 0 · ESP32-WROOM-32E 10
Deep sleep: ESP32-C3-MINI-1 5 µA · ESP32-WROOM-32E 10 µA
Dimensions: ESP32-C3-MINI-1 13.2 × 16.6 × 2.4 mm · ESP32-WROOM-32E 18 × 25.5 × 3.1 mm
Pin count: ESP32-C3-MINI-1 53 · ESP32-WROOM-32E 38
Crypto: ESP32-C3-MINI-1 AES, SHA, RSA, HMAC, RNG · ESP32-WROOM-32E AES, SHA, RSA, RNG
Digital signature: ESP32-C3-MINI-1 Yes · ESP32-WROOM-32E No

Compute & memory

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	ESP32-C3-MINI-1	ESP32-WROOM-32E
CPU≠	RISC-V, 1-core	Xtensa LX6, 2-core
Max clock≠	160 MHz	240 MHz
SRAM≠	400 KB	520 KB
ROM≠	384 KB	448 KB
Flash options≠	4 MB	4 / 8 / 16 MB
PSRAM≠	None	2 MB (quad)
Co-processor≠	none	ULP-FSM

Wireless

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	ESP32-C3-MINI-1	ESP32-WROOM-32E
Wi-Fi	Wi-Fi 4	Wi-Fi 4
Wi-Fi bands	2.4GHz	2.4GHz
Bluetooth≠	BLE 5.x	BT Classic + BLE
802.15.4 (Thread/Zigbee)	No	No
Antenna	PCB	PCB

Peripherals & I/O

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	ESP32-C3-MINI-1	ESP32-WROOM-32E
Usable GPIO≠	15	26
ADC≠	6× 12-bit	18× 12-bit
USB≠	USB-Serial-JTAG	USB-Serial(external)
UART / SPI / I²C / I²S≠	2 / 1 / 1 / 1	3 / 2 / 2 / 2
TWAI (CAN)	Yes	Yes
SD/MMC≠	No	Yes
Ethernet MAC≠	No	Yes
Touch≠	0	10

Power

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	ESP32-C3-MINI-1	ESP32-WROOM-32E
Operating voltage	3.0-3.6 V	3.0-3.6 V
Deep sleep≠	5 µA	10 µA

Physical

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	ESP32-C3-MINI-1	ESP32-WROOM-32E
Dimensions≠	13.2 × 16.6 × 2.4 mm	18 × 25.5 × 3.1 mm
Pin count≠	53	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-C3-MINI-1	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