ESP32-C61-MINI-1 vs ESP32-S2-WROOM

ESP32-C61-MINI-1

MINI · ESP32-C61 · New

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ESP32-S2-WROOM

WROOM · ESP32-S2 · 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-C61 vs ESP32-S2), so they differ in CPU, wireless and peripherals, not just packaging.

Choose ESP32-C61-MINI-1 if you need

Wi-Fi 6: better battery life and throughput in busy networks
Bluetooth LE
PSRAM for camera frames, audio buffers and LVGL/large displays
larger flash option (up to 8 MB) for bigger firmware and OTA
smaller footprint (13.2×16.6 mm)

Choose ESP32-S2-WROOM if you need

faster CPU (240 MHz, Xtensa LX7)
native USB-OTG: act as a USB device/host without a USB-UART chip
more usable GPIO (37 vs 23)

Size, to scale

ESP32-C61-MINI-1: 13.2×16.6 mm
ESP32-S2-WROOM: 18×31 mm

Spec differences at a glance

CPU: ESP32-C61-MINI-1 RISC-V, 1-core · ESP32-S2-WROOM Xtensa LX7, 1-core
Max clock: ESP32-C61-MINI-1 160 MHz · ESP32-S2-WROOM 240 MHz
ROM: ESP32-C61-MINI-1 256 KB · ESP32-S2-WROOM 128 KB
Flash options: ESP32-C61-MINI-1 4 / 8 MB · ESP32-S2-WROOM 4 MB
PSRAM: ESP32-C61-MINI-1 8 MB (quad) · ESP32-S2-WROOM None
Co-processor: ESP32-C61-MINI-1 none · ESP32-S2-WROOM ULP-RISC-V
Wi-Fi: ESP32-C61-MINI-1 Wi-Fi 6 · ESP32-S2-WROOM Wi-Fi 4
Bluetooth: ESP32-C61-MINI-1 BLE 5.x · ESP32-S2-WROOM —
Usable GPIO: ESP32-C61-MINI-1 23 · ESP32-S2-WROOM 37
ADC: ESP32-C61-MINI-1 4× 12-bit · ESP32-S2-WROOM 20× 12-bit
USB: ESP32-C61-MINI-1 USB-Serial-JTAG · ESP32-S2-WROOM USB-OTG
UART / SPI / I²C / I²S: ESP32-C61-MINI-1 3 / 1 / 1 / 1 · ESP32-S2-WROOM 2 / 2 / 2 / 1
TWAI (CAN): ESP32-C61-MINI-1 No · ESP32-S2-WROOM Yes
SD/MMC: ESP32-C61-MINI-1 Yes · ESP32-S2-WROOM No
Touch: ESP32-C61-MINI-1 0 · ESP32-S2-WROOM 14
Deep sleep: ESP32-C61-MINI-1 10 µA · ESP32-S2-WROOM — µA
Dimensions: ESP32-C61-MINI-1 13.2 × 16.6 × 2.4 mm · ESP32-S2-WROOM 18 × 31 × 3.3 mm
Pin count: ESP32-C61-MINI-1 53 · ESP32-S2-WROOM 42
Lifecycle: ESP32-C61-MINI-1 New · ESP32-S2-WROOM Active
Crypto: ESP32-C61-MINI-1 AES, SHA, ECC, ECDSA, RNG · ESP32-S2-WROOM AES, SHA, RSA, HMAC, RNG

Compute & memory

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	ESP32-C61-MINI-1	ESP32-S2-WROOM
CPU≠	RISC-V, 1-core	Xtensa LX7, 1-core
Max clock≠	160 MHz	240 MHz
SRAM	320 KB	320 KB
ROM≠	256 KB	128 KB
Flash options≠	4 / 8 MB	4 MB
PSRAM≠	8 MB (quad)	None
Co-processor≠	none	ULP-RISC-V

Wireless

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	ESP32-C61-MINI-1	ESP32-S2-WROOM
Wi-Fi≠	Wi-Fi 6	Wi-Fi 4
Wi-Fi bands	2.4GHz	2.4GHz
Bluetooth≠	BLE 5.x	—
802.15.4 (Thread/Zigbee)	No	No
Antenna	PCB	PCB

Peripherals & I/O

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	ESP32-C61-MINI-1	ESP32-S2-WROOM
Usable GPIO≠	23	37
ADC≠	4× 12-bit	20× 12-bit
USB≠	USB-Serial-JTAG	USB-OTG
UART / SPI / I²C / I²S≠	3 / 1 / 1 / 1	2 / 2 / 2 / 1
TWAI (CAN)≠	No	Yes
SD/MMC≠	Yes	No
Ethernet MAC	No	No
Touch≠	0	14

Power

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	ESP32-C61-MINI-1	ESP32-S2-WROOM
Operating voltage	3.0-3.6 V	3.0-3.6 V
Deep sleep≠	10 µA	— µA

Physical

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	ESP32-C61-MINI-1	ESP32-S2-WROOM
Dimensions≠	13.2 × 16.6 × 2.4 mm	18 × 31 × 3.3 mm
Pin count≠	53	42
Temp range	-40 to 85 °C	-40 to 85 °C
Mounting	SMD castellated	SMD castellated
Lifecycle≠	New	Active

Security

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	ESP32-C61-MINI-1	ESP32-S2-WROOM
Secure boot	Yes	Yes
Flash encryption	Yes	Yes
Crypto≠	AES, SHA, ECC, ECDSA, RNG	AES, SHA, RSA, HMAC, RNG
Digital signature	Yes	Yes
TRNG	Yes	Yes