ESP32-PICO-MINI-02 vs ESP32-S2-MINI-1

ESP32-PICO-MINI-02

PICO · ESP32 · Active

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ESP32-S2-MINI-1

MINI · ESP32-S2 · NRND

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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 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
larger flash option (up to 8 MB) for bigger firmware and OTA
Ethernet MAC for wired networking (add an external PHY)
smaller footprint (13.2×16.6 mm)

Choose ESP32-S2-MINI-1 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-MINI-1: 15.4×20 mm

Spec differences at a glance

CPU: ESP32-PICO-MINI-02 Xtensa LX6, 2-core · ESP32-S2-MINI-1 Xtensa LX7, 1-core
SRAM: ESP32-PICO-MINI-02 520 KB · ESP32-S2-MINI-1 320 KB
ROM: ESP32-PICO-MINI-02 448 KB · ESP32-S2-MINI-1 128 KB
Flash options: ESP32-PICO-MINI-02 8 MB · ESP32-S2-MINI-1 4 MB
Co-processor: ESP32-PICO-MINI-02 ULP-FSM · ESP32-S2-MINI-1 ULP-RISC-V
Bluetooth: ESP32-PICO-MINI-02 BT Classic + BLE · ESP32-S2-MINI-1 —
Usable GPIO: ESP32-PICO-MINI-02 27 · ESP32-S2-MINI-1 37
ADC: ESP32-PICO-MINI-02 18× 12-bit · ESP32-S2-MINI-1 20× 12-bit
USB: ESP32-PICO-MINI-02 USB-Serial(external) · ESP32-S2-MINI-1 USB-OTG
UART / SPI / I²C / I²S: ESP32-PICO-MINI-02 3 / 2 / 2 / 2 · ESP32-S2-MINI-1 2 / 2 / 2 / 1
SD/MMC: ESP32-PICO-MINI-02 Yes · ESP32-S2-MINI-1 No
Ethernet MAC: ESP32-PICO-MINI-02 Yes · ESP32-S2-MINI-1 No
Touch: ESP32-PICO-MINI-02 10 · ESP32-S2-MINI-1 14
Deep sleep: ESP32-PICO-MINI-02 10 µA · ESP32-S2-MINI-1 — µA
Dimensions: ESP32-PICO-MINI-02 13.2 × 16.6 × 2.4 mm · ESP32-S2-MINI-1 15.4 × 20 × 2.4 mm
Pin count: ESP32-PICO-MINI-02 31 · ESP32-S2-MINI-1 41
Lifecycle: ESP32-PICO-MINI-02 Active · ESP32-S2-MINI-1 NRND
Crypto: ESP32-PICO-MINI-02 AES, SHA, RSA, RNG · ESP32-S2-MINI-1 AES, SHA, RSA, HMAC, RNG
Digital signature: ESP32-PICO-MINI-02 No · ESP32-S2-MINI-1 Yes

Compute & memory

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	ESP32-PICO-MINI-02	ESP32-S2-MINI-1
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)	2 MB (quad)
Co-processor≠	ULP-FSM	ULP-RISC-V

Wireless

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	ESP32-PICO-MINI-02	ESP32-S2-MINI-1
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

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	ESP32-PICO-MINI-02	ESP32-S2-MINI-1
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

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	ESP32-PICO-MINI-02	ESP32-S2-MINI-1
Operating voltage	3.0-3.6 V	3.0-3.6 V
Deep sleep≠	10 µA	— µA

Physical

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	ESP32-PICO-MINI-02	ESP32-S2-MINI-1
Dimensions≠	13.2 × 16.6 × 2.4 mm	15.4 × 20 × 2.4 mm
Pin count≠	31	41
Temp range	-40 to 85 °C	-40 to 85 °C
Mounting	SMD castellated	SMD castellated
Lifecycle≠	Active	NRND

Security

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	ESP32-PICO-MINI-02	ESP32-S2-MINI-1
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