ESP32-PICO-MINI-02 vs ESP32-S3-WROOM-1

ESP32-PICO-MINI-02

PICO · ESP32 · Active

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ESP32-S3-WROOM-1

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

Choose ESP32-PICO-MINI-02 if you need

Bluetooth Classic (BR/EDR) for legacy SPP / A2DP audio
Ethernet MAC for wired networking (add an external PHY)
smaller footprint (13.2×16.6 mm)

Choose ESP32-S3-WROOM-1 if you need

vector / AI acceleration for on-device ML and DSP
more PSRAM (up to 16 MB)
larger flash option (up to 16 MB) for bigger firmware and OTA
native USB-OTG: act as a USB device/host without a USB-UART chip
more usable GPIO (36 vs 27)

Size, to scale

ESP32-PICO-MINI-02: 13.2×16.6 mm
ESP32-S3-WROOM-1: 18×25.5 mm

Spec differences at a glance

CPU: ESP32-PICO-MINI-02 Xtensa LX6, 2-core · ESP32-S3-WROOM-1 Xtensa LX7, 2-core
SRAM: ESP32-PICO-MINI-02 520 KB · ESP32-S3-WROOM-1 512 KB
ROM: ESP32-PICO-MINI-02 448 KB · ESP32-S3-WROOM-1 384 KB
Flash options: ESP32-PICO-MINI-02 8 MB · ESP32-S3-WROOM-1 4 / 8 / 16 MB
PSRAM: ESP32-PICO-MINI-02 2 MB (quad) · ESP32-S3-WROOM-1 2 / 8 / 16 MB
Co-processor: ESP32-PICO-MINI-02 ULP-FSM · ESP32-S3-WROOM-1 ULP-RISC-V
Bluetooth: ESP32-PICO-MINI-02 BT Classic + BLE · ESP32-S3-WROOM-1 BLE 5.x
Usable GPIO: ESP32-PICO-MINI-02 27 · ESP32-S3-WROOM-1 36
ADC: ESP32-PICO-MINI-02 18× 12-bit · ESP32-S3-WROOM-1 20× 12-bit
USB: ESP32-PICO-MINI-02 USB-Serial(external) · ESP32-S3-WROOM-1 USB-OTG
Ethernet MAC: ESP32-PICO-MINI-02 Yes · ESP32-S3-WROOM-1 No
Touch: ESP32-PICO-MINI-02 10 · ESP32-S3-WROOM-1 14
Deep sleep: ESP32-PICO-MINI-02 10 µA · ESP32-S3-WROOM-1 7 µA
Dimensions: ESP32-PICO-MINI-02 13.2 × 16.6 × 2.4 mm · ESP32-S3-WROOM-1 18 × 25.5 × 3.1 mm
Pin count: ESP32-PICO-MINI-02 31 · ESP32-S3-WROOM-1 41
Crypto: ESP32-PICO-MINI-02 AES, SHA, RSA, RNG · ESP32-S3-WROOM-1 AES, SHA, RSA, HMAC, RNG
Digital signature: ESP32-PICO-MINI-02 No · ESP32-S3-WROOM-1 Yes

Compute & memory

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	ESP32-PICO-MINI-02	ESP32-S3-WROOM-1
CPU≠	Xtensa LX6, 2-core	Xtensa LX7, 2-core
Max clock	240 MHz	240 MHz
SRAM≠	520 KB	512 KB
ROM≠	448 KB	384 KB
Flash options≠	8 MB	4 / 8 / 16 MB
PSRAM≠	2 MB (quad)	2 / 8 / 16 MB
Co-processor≠	ULP-FSM	ULP-RISC-V

Wireless

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	ESP32-PICO-MINI-02	ESP32-S3-WROOM-1
Wi-Fi	Wi-Fi 4	Wi-Fi 4
Wi-Fi bands	2.4GHz	2.4GHz
Bluetooth≠	BT Classic + BLE	BLE 5.x
802.15.4 (Thread/Zigbee)	No	No
Antenna	PCB	PCB

Peripherals & I/O

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	ESP32-PICO-MINI-02	ESP32-S3-WROOM-1
Usable GPIO≠	27	36
ADC≠	18× 12-bit	20× 12-bit
USB≠	USB-Serial(external)	USB-OTG
UART / SPI / I²C / I²S	3 / 2 / 2 / 2	3 / 2 / 2 / 2
TWAI (CAN)	Yes	Yes
SD/MMC	Yes	Yes
Ethernet MAC≠	Yes	No
Touch≠	10	14

Power

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	ESP32-PICO-MINI-02	ESP32-S3-WROOM-1
Operating voltage	3.0-3.6 V	3.0-3.6 V
Deep sleep≠	10 µA	7 µA

Physical

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	ESP32-PICO-MINI-02	ESP32-S3-WROOM-1
Dimensions≠	13.2 × 16.6 × 2.4 mm	18 × 25.5 × 3.1 mm
Pin count≠	31	41
Temp range	-40 to 85 °C	-40 to 85 °C
Mounting	SMD castellated	SMD castellated
Lifecycle	Active	Active

Security

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	ESP32-PICO-MINI-02	ESP32-S3-WROOM-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