ESP32-H2-MINI-1 vs ESP32-SOLO-1

ESP32-H2-MINI-1

MINI · ESP32-H2 · Active

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ESP32-SOLO-1

SOLO · 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-H2 vs ESP32), so they differ in CPU, wireless and peripherals, not just packaging.

Choose ESP32-H2-MINI-1 if you need

802.15.4 radio for Thread, Zigbee and Matter-over-Thread mesh
smaller footprint (13.2×16.6 mm)

Choose ESP32-SOLO-1 if you need

newer Wi-Fi (Wi-Fi 4)
Bluetooth Classic (BR/EDR) for legacy SPP / A2DP audio
faster CPU (240 MHz, Xtensa LX6)
Ethernet MAC for wired networking (add an external PHY)
more usable GPIO (32 vs 19)

Size, to scale

ESP32-H2-MINI-1: 13.2×16.6 mm
ESP32-SOLO-1: 18×25.5 mm

Spec differences at a glance

CPU: ESP32-H2-MINI-1 RISC-V, 1-core · ESP32-SOLO-1 Xtensa LX6, 1-core
Max clock: ESP32-H2-MINI-1 96 MHz · ESP32-SOLO-1 240 MHz
SRAM: ESP32-H2-MINI-1 320 KB · ESP32-SOLO-1 520 KB
ROM: ESP32-H2-MINI-1 128 KB · ESP32-SOLO-1 448 KB
Flash options: ESP32-H2-MINI-1 2 / 4 MB · ESP32-SOLO-1 4 MB
Co-processor: ESP32-H2-MINI-1 none · ESP32-SOLO-1 ULP-FSM
Wi-Fi: ESP32-H2-MINI-1 — · ESP32-SOLO-1 Wi-Fi 4
Wi-Fi bands: ESP32-H2-MINI-1 — · ESP32-SOLO-1 2.4GHz
Bluetooth: ESP32-H2-MINI-1 BLE 5.x · ESP32-SOLO-1 BT Classic + BLE
802.15.4 (Thread/Zigbee): ESP32-H2-MINI-1 Yes · ESP32-SOLO-1 No
Usable GPIO: ESP32-H2-MINI-1 19 · ESP32-SOLO-1 32
ADC: ESP32-H2-MINI-1 5× 12-bit · ESP32-SOLO-1 18× 12-bit
USB: ESP32-H2-MINI-1 USB-Serial-JTAG · ESP32-SOLO-1 USB-Serial(external)
UART / SPI / I²C / I²S: ESP32-H2-MINI-1 2 / 1 / 2 / 1 · ESP32-SOLO-1 3 / 2 / 2 / 2
SD/MMC: ESP32-H2-MINI-1 No · ESP32-SOLO-1 Yes
Ethernet MAC: ESP32-H2-MINI-1 No · ESP32-SOLO-1 Yes
Touch: ESP32-H2-MINI-1 0 · ESP32-SOLO-1 10
Deep sleep: ESP32-H2-MINI-1 7 µA · ESP32-SOLO-1 10 µA
Dimensions: ESP32-H2-MINI-1 13.2 × 16.6 × 2.4 mm · ESP32-SOLO-1 18 × 25.5 × 3.1 mm
Pin count: ESP32-H2-MINI-1 53 · ESP32-SOLO-1 38
Temp range: ESP32-H2-MINI-1 -40 to 105 °C · ESP32-SOLO-1 -40 to 85 °C
Crypto: ESP32-H2-MINI-1 AES, SHA, RSA, HMAC, ECC, ECDSA, RNG · ESP32-SOLO-1 AES, SHA, RSA, RNG
Digital signature: ESP32-H2-MINI-1 Yes · ESP32-SOLO-1 No

Compute & memory

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	ESP32-H2-MINI-1	ESP32-SOLO-1
CPU≠	RISC-V, 1-core	Xtensa LX6, 1-core
Max clock≠	96 MHz	240 MHz
SRAM≠	320 KB	520 KB
ROM≠	128 KB	448 KB
Flash options≠	2 / 4 MB	4 MB
PSRAM	None	None
Co-processor≠	none	ULP-FSM

Wireless

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	ESP32-H2-MINI-1	ESP32-SOLO-1
Wi-Fi≠	—	Wi-Fi 4
Wi-Fi bands≠	—	2.4GHz
Bluetooth≠	BLE 5.x	BT Classic + BLE
802.15.4 (Thread/Zigbee)≠	Yes	No
Antenna	PCB	PCB

Peripherals & I/O

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	ESP32-H2-MINI-1	ESP32-SOLO-1
Usable GPIO≠	19	32
ADC≠	5× 12-bit	18× 12-bit
USB≠	USB-Serial-JTAG	USB-Serial(external)
UART / SPI / I²C / I²S≠	2 / 1 / 2 / 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-H2-MINI-1	ESP32-SOLO-1
Operating voltage	3.0-3.6 V	3.0-3.6 V
Deep sleep≠	7 µA	10 µA

Physical

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	ESP32-H2-MINI-1	ESP32-SOLO-1
Dimensions≠	13.2 × 16.6 × 2.4 mm	18 × 25.5 × 3.1 mm
Pin count≠	53	38
Temp range≠	-40 to 105 °C	-40 to 85 °C
Mounting	SMD castellated	SMD castellated
Lifecycle	Active	Active

Security

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	ESP32-H2-MINI-1	ESP32-SOLO-1
Secure boot	Yes	Yes
Flash encryption	Yes	Yes
Crypto≠	AES, SHA, RSA, HMAC, ECC, ECDSA, RNG	AES, SHA, RSA, RNG
Digital signature≠	Yes	No
TRNG	Yes	Yes