# ESP32-H2 SuperMini Dev Board

> The ESP32-H2 SuperMini is a stamp-size generic board on the ESP32-H2FH4S: 96 MHz RISC-V, 4 MB flash, 320 KB SRAM, Bluetooth 5.3 LE and 802.15.4 for Zigbee 3.0 / Thread / Matter, and no Wi-Fi. USB-C goes to native USB Serial/JTAG. It breaks out 19 GPIO (5 ADC), has BOOT / RESET, a WS2812 on GPIO8, a blue LED on GPIO13, BAT pads and 3.3 V logic, 24 × 18.4 mm, $6.95.

- Manufacturer: Generic (unbranded)
- Part number: ESP32-H2 SuperMini
- Category: Development boards
- Canonical page: https://www.xirkit.io/products/generic-esp32-h2-supermini-dev-board-ea00
- Pinout: https://www.xirkit.io/products/generic-esp32-h2-supermini-dev-board-ea00/pinout
- Structured JSON: https://www.xirkit.io/products/generic-esp32-h2-supermini-dev-board-ea00/data.json
- Source: Xirkit structured parts catalog — every value traced to a cited document; unknowns are explicit.

## Key specifications

| Property | Value |
| --- | --- |
| Main chip | ESP32-H2FH4S |
| Chips on board | ESP32-H2FH4S |
| Exposed GPIO | 19 |
| Documented board pins | 22 |
| I/O voltage | 3.3 V |
| Supply voltage | 5–5 V |
| Flash | 4,096 KB |
| SRAM | 320 KB |
| Interfaces | gpio, spi, adc, jtag, led, control, other, clock, uart, usb |
| Frameworks | Arduino IDE, ESP-IDF, ESPHome |
| Dimensions | 24 × 18.4 mm |

## Pinout (22 pins, 19 with electrical limits)

| Pin | Position | Kind | Chip pad | Functions | VIH | VIL | VOH | VOL | IOH | IOL | 5 V tolerant |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 5V | R1 | power in | — | power_in | — | — | — | — | — | — | — |
| GND | R2 | ground | — | ground | — | — | — | — | — | — | — |
| 3V3 | R3 | power out | — | power_out | — | — | — | — | — | — | — |
| 0 | L3 | gpio | GPIO0 | GPIO0, FSPIQ | 2.475–3.6 V | -0.3–0.825 V | ≥ 2.64 V | ≤ 0.33 V | 40 mA typ | 28 mA typ | no |
| 1 | L4 | gpio | GPIO1 | ADC1_CH0, GPIO1, FSPICS0 | 2.475–3.6 V | -0.3–0.825 V | ≥ 2.64 V | ≤ 0.33 V | 40 mA typ | 28 mA typ | no |
| 2 | L5 | gpio | GPIO2 | ADC1_CH1, GPIO2, MTMS, FSPIWP | 2.475–3.6 V | -0.3–0.825 V | ≥ 2.64 V | ≤ 0.33 V | 40 mA typ | 28 mA typ | no |
| 3 | L6 | gpio | GPIO3 | ADC1_CH2, GPIO3, MTDO, FSPIHD | 2.475–3.6 V | -0.3–0.825 V | ≥ 2.64 V | ≤ 0.33 V | 40 mA typ | 28 mA typ | no |
| 4 | L7 | gpio | GPIO4 | ADC1_CH3, GPIO4, MTCK, FSPICLK | 2.475–3.6 V | -0.3–0.825 V | ≥ 2.64 V | ≤ 0.33 V | 40 mA typ | 28 mA typ | no |
| 5 | L8 | gpio | GPIO5 | ADC1_CH4, GPIO5, MTDI, FSPID | 2.475–3.6 V | -0.3–0.825 V | ≥ 2.64 V | ≤ 0.33 V | 40 mA typ | 28 mA typ | no |
| 8 | L9 | gpio | GPIO8 | onboard WS2812 RGB LED, strapping (boot mode / ROM log), floating by default, GPIO8 | 2.475–3.6 V | -0.3–0.825 V | ≥ 2.64 V | ≤ 0.33 V | 40 mA typ | 28 mA typ | no |
| 9 | R9 | gpio | GPIO9 | BOOT button (low at reset = download mode), strapping (boot mode), weak pull-up, GPIO9 | 2.475–3.6 V | -0.3–0.825 V | ≥ 2.64 V | ≤ 0.33 V | 40 mA typ | 28 mA typ | no |
| 10 | R8 | gpio | GPIO10 | ZCD0 (zero-cross detect), GPIO10 | 2.475–3.6 V | -0.3–0.825 V | ≥ 2.64 V | ≤ 0.33 V | 40 mA typ | 28 mA typ | no |
| 11 | R7 | gpio | GPIO11 | ZCD1 (zero-cross detect), GPIO11 | 2.475–3.6 V | -0.3–0.825 V | ≥ 2.64 V | ≤ 0.33 V | 40 mA typ | 28 mA typ | no |
| 12 | R6 | gpio | GPIO12 | GPIO12 | 2.475–3.6 V | -0.3–0.825 V | ≥ 2.64 V | ≤ 0.33 V | 40 mA typ | 28 mA typ | no |
| 13 | R5 | gpio | GPIO13 | blue user LED, XTAL_32K_P, GPIO13 | 2.475–3.6 V | -0.3–0.825 V | ≥ 2.64 V | ≤ 0.33 V | 40 mA typ | 28 mA typ | no |
| 14 | R4 | gpio | GPIO14 | XTAL_32K_N, GPIO14 | 2.475–3.6 V | -0.3–0.825 V | ≥ 2.64 V | ≤ 0.33 V | 40 mA typ | 28 mA typ | no |
| 22 | inner pad | gpio | GPIO22 | GPIO22 | 2.475–3.6 V | -0.3–0.825 V | ≥ 2.64 V | ≤ 0.33 V | 40 mA typ | 28 mA typ | no |
| 24 | L1 | gpio | GPIO24 | TX (UART0), GPIO24, U0TXD, FSPICS2 | 2.475–3.6 V | -0.3–0.825 V | ≥ 2.64 V | ≤ 0.33 V | 40 mA typ | 28 mA typ | no |
| 23 | L2 | gpio | GPIO23 | RX (UART0), GPIO23, U0RXD, FSPICS1 | 2.475–3.6 V | -0.3–0.825 V | ≥ 2.64 V | ≤ 0.33 V | 40 mA typ | 28 mA typ | no |
| 25 | inner pad | gpio | GPIO25 | strapping (JTAG source), floating by default, GPIO25, FSPICS3 | 2.475–3.6 V | -0.3–0.825 V | ≥ 2.64 V | ≤ 0.33 V | 40 mA typ | 28 mA typ | no |
| 26 | inner pad | gpio | GPIO26 | USB_D-, GPIO26, FSPICS4 | 2.475–3.6 V | -0.3–0.825 V | ≥ 2.64 V | ≤ 0.33 V | 40 mA typ | 28 mA typ | no |
| 27 | inner pad | gpio | GPIO27 | USB_D+, GPIO27, FSPICS5 | 2.475–3.6 V | -0.3–0.825 V | ≥ 2.64 V | ≤ 0.33 V | 40 mA typ | 28 mA typ | no |

## Where to buy

| Supplier | Price | Stock | Checked | URL |
| --- | --- | --- | --- | --- |
| ameridroid.com | 6.95 USD | in_stock | 2026-10-18 | https://ameridroid.com/products/esp32-h2-supermini-dev-board-1 |

## FAQ

**What microcontroller does the ESP32-H2 SuperMini Dev Board use?**

The ESP32-H2 SuperMini Dev Board is built around the ESP32-H2FH4S.

**How many GPIO pins does the ESP32-H2 SuperMini Dev Board have?**

19 GPIO pins are exposed. Xirkit documents 22 board pins, 19 of them with pin-level electrical limits.

**Are the ESP32-H2 SuperMini Dev Board I/O pins 5 V tolerant?**

No. The I/O pins are not 5 V tolerant — they run at 3.3 V logic; use a level shifter for 5 V signals. Input-high threshold: 2.475–3.6 V.

**How much current can a ESP32-H2 SuperMini Dev Board GPIO pin source?**

Documented output-high current per pin: 40 mA typ. Values are traced to the chip datasheet; see the pinout table for per-pin limits and conditions.

**What voltage powers the ESP32-H2 SuperMini Dev Board?**

Supply range 5–5 V. Power inputs: 5V.

**How much does the ESP32-H2 SuperMini Dev Board cost?**

From $6.95 at ameridroid.com. Prices are observed unit prices before tax and shipping.

**What are the ESP32-H2 SuperMini Dev Board dimensions?**

24 × 18.4 mm. A STEP model is available for enclosure fit checks.

**Which interfaces does the ESP32-H2 SuperMini Dev Board support?**

gpio, spi, adc, jtag, led, control, other, clock, uart, usb.

**How do I program the ESP32-H2 SuperMini Dev Board?**

Supported frameworks: Arduino IDE, ESP-IDF, ESPHome.

**Where does this ESP32-H2 SuperMini Dev Board data come from?**

Every value in this record is traced to a source — 2 documents including the board and chip datasheets — with the page and table cited per value. Unknowns are left explicit, never guessed.

## Sources

- [ESP32-H2 SuperMini Dev Board datasheet](https://www.espboards.dev/esp32/esp32-h2-super-mini/)
- [ameridroid.com listing](https://ameridroid.com/products/esp32-h2-supermini-dev-board-1)

## Part graph

### Built from

- [ESP32-H2FH4S](https://www.xirkit.io/products/category/dev-boards/esp32-h2fh4s) — main processor on the ESP32-H2 SuperMini Dev Board

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