ESP32-PICO-MINI-02 vs ESP32-S2-WROOM

ESP32-PICO-MINI-02

PICO · ESP32 · Active

Check price on AliExpress → Check price on Amazon →

As an Amazon Associate and an affiliate we may earn from qualifying purchases. Prices and availability are set by the retailer.

ESP32-S2-WROOM

WROOM · ESP32-S2 · Active

Check price on AliExpress → Check price on Amazon →

As an Amazon Associate and an affiliate we may earn from qualifying purchases. Prices and availability are set by the retailer.

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

Choose ESP32-PICO-MINI-02 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 8 MB) for bigger firmware and OTA
Ethernet MAC for wired networking (add an external PHY)

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 27)

Size, to scale

ESP32-PICO-MINI-02: 13.2×16.6 mm
ESP32-S2-WROOM: 18×31 mm

Spec differences at a glance

CPU: ESP32-PICO-MINI-02 Xtensa LX6, 2-core · ESP32-S2-WROOM Xtensa LX7, 1-core
SRAM: ESP32-PICO-MINI-02 520 KB · ESP32-S2-WROOM 320 KB
ROM: ESP32-PICO-MINI-02 448 KB · ESP32-S2-WROOM 128 KB
Flash options: ESP32-PICO-MINI-02 8 MB · ESP32-S2-WROOM 4 MB
PSRAM: ESP32-PICO-MINI-02 2 MB (quad) · ESP32-S2-WROOM None
Co-processor: ESP32-PICO-MINI-02 ULP-FSM · ESP32-S2-WROOM ULP-RISC-V
Bluetooth: ESP32-PICO-MINI-02 BT Classic + BLE · ESP32-S2-WROOM —
Usable GPIO: ESP32-PICO-MINI-02 27 · ESP32-S2-WROOM 37
ADC: ESP32-PICO-MINI-02 18× 12-bit · ESP32-S2-WROOM 20× 12-bit
USB: ESP32-PICO-MINI-02 USB-Serial(external) · ESP32-S2-WROOM USB-OTG
UART / SPI / I²C / I²S: ESP32-PICO-MINI-02 3 / 2 / 2 / 2 · ESP32-S2-WROOM 2 / 2 / 2 / 1
SD/MMC: ESP32-PICO-MINI-02 Yes · ESP32-S2-WROOM No
Ethernet MAC: ESP32-PICO-MINI-02 Yes · ESP32-S2-WROOM No
Touch: ESP32-PICO-MINI-02 10 · ESP32-S2-WROOM 14
Deep sleep: ESP32-PICO-MINI-02 10 µA · ESP32-S2-WROOM — µA
Dimensions: ESP32-PICO-MINI-02 13.2 × 16.6 × 2.4 mm · ESP32-S2-WROOM 18 × 31 × 3.3 mm
Pin count: ESP32-PICO-MINI-02 31 · ESP32-S2-WROOM 42
Crypto: ESP32-PICO-MINI-02 AES, SHA, RSA, RNG · ESP32-S2-WROOM AES, SHA, RSA, HMAC, RNG
Digital signature: ESP32-PICO-MINI-02 No · ESP32-S2-WROOM Yes

Compute & memory

⚑ flag an error

	ESP32-PICO-MINI-02	ESP32-S2-WROOM
CPU≠	Xtensa LX6, 2-core	Xtensa LX7, 1-core
Max clock	240 MHz	240 MHz
SRAM≠	520 KB	320 KB
ROM≠	448 KB	128 KB
Flash options≠	8 MB	4 MB
PSRAM≠	2 MB (quad)	None
Co-processor≠	ULP-FSM	ULP-RISC-V

Wireless

⚑ flag an error

	ESP32-PICO-MINI-02	ESP32-S2-WROOM
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

⚑ flag an error

	ESP32-PICO-MINI-02	ESP32-S2-WROOM
Usable GPIO≠	27	37
ADC≠	18× 12-bit	20× 12-bit
USB≠	USB-Serial(external)	USB-OTG
UART / SPI / I²C / I²S≠	3 / 2 / 2 / 2	2 / 2 / 2 / 1
TWAI (CAN)	Yes	Yes
SD/MMC≠	Yes	No
Ethernet MAC≠	Yes	No
Touch≠	10	14

Power

⚑ flag an error

	ESP32-PICO-MINI-02	ESP32-S2-WROOM
Operating voltage	3.0-3.6 V	3.0-3.6 V
Deep sleep≠	10 µA	— µA

Physical

⚑ flag an error

	ESP32-PICO-MINI-02	ESP32-S2-WROOM
Dimensions≠	13.2 × 16.6 × 2.4 mm	18 × 31 × 3.3 mm
Pin count≠	31	42
Temp range	-40 to 85 °C	-40 to 85 °C
Mounting	SMD castellated	SMD castellated
Lifecycle	Active	Active

Security

⚑ flag an error

	ESP32-PICO-MINI-02	ESP32-S2-WROOM
Secure boot	Yes	Yes
Flash encryption	Yes	Yes
Crypto≠	AES, SHA, RSA, RNG	AES, SHA, RSA, HMAC, RNG
Digital signature≠	No	Yes
TRNG	Yes	Yes