Connected IoT devices and wireless sensor nodes
On-board radio: IEEE 802.15.4 (Zigbee 3.0 / Thread); Bluetooth 5.3 LE.
Engineering inference
Generic (unbranded)
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.
ESP32-H2 SuperMiniDevelopment boardPrice$6.95ameridroid.com · in stock
Buy at ameridroid.com Overview
Board essentials
Facts about the complete product. Unknown values remain open design questions.
- Exposed GPIO
- 19
- Board I/O voltage
- 3.3 V
- Board flash capacity
- 4 MiB
- Board SRAM capacity
- 320 KiB
A good fit for
Guidance to help you shortlist. The basis is shown for each recommendation.
Space-constrained and embedded builds
24.0 × 18.4 mm footprint.
Engineering inferenceLearning and fast prototyping
Programs from Arduino IDE, ESP-IDF, ESPHome.
Engineering inferenceInside this board
The board is the parent product. Each chip has its own memory, pins, capabilities and thermal limits.
main processor
ESP32-H2FH4S
Espressif Systems
ea0055c1-998a-5ef4-922b-285491fd2839--mcu- Architecture
- 32-bit RISC-V single-core
- Documented clock
- 96 MHz
- Chip / in-package flash
- 4 MiB
- On-chip SRAM
- 320 KiB
3D model & CAD
3D model & CAD files
Generated from the datasheet's dimensioned drawing and measured against it. Download the STEP to check fit in your own enclosure.
- Envelope (L × W × H)
- 24 × 18.4 × 1.6 mm
- Verification
- generated
- Envelope complete
- No — some heights assumed
thickness=1.6 mm assumed: PCB thickness not printed; 1.6 mm assumed for the CAD envelope only
Pins & mapping
22 board pins and 19 explicit routes documented. The record marks the pinout complete. Alternate functions can share pins and may not be usable together.
Exposed board pins
Board connector positions are the physical points you wire to.
| Board pin | Connector / position | Electrical | Functions / constraints |
|---|---|---|---|
| 5VID 5V | —Position R1 | 5 Vpower in | power_in 5V power input for the board |
| GNDID GND | —Position R2 | 0 Vground | ground Ground connection |
| 3V3ID 3V3 | —Position R3 | power out | power_out 3.3V power output for peripherals |
| 0ID 0 | —Position L3 | 3.3 Vgpio5 V tolerant: noMax drive 28 mA | GPIO0, FSPIQ GPIO |
| 1ID 1 | —Position L4 | 3.3 Vgpio5 V tolerant: noMax drive 28 mA | ADC1_CH0, GPIO1, FSPICS0 GPIO, ADC pin |
| 2ID 2 | —Position L5 | 3.3 Vgpio5 V tolerant: noMax drive 28 mA | ADC1_CH1, GPIO2, MTMS, FSPIWP GPIO, ADC pin |
| 3ID 3 | —Position L6 | 3.3 Vgpio5 V tolerant: noMax drive 28 mA | ADC1_CH2, GPIO3, MTDO, FSPIHD GPIO, ADC pin |
| 4ID 4 | —Position L7 | 3.3 Vgpio5 V tolerant: noMax drive 28 mA | ADC1_CH3, GPIO4, MTCK, FSPICLK GPIO, ADC pin |
| 5ID 5 | —Position L8 | 3.3 Vgpio5 V tolerant: noMax drive 28 mA | ADC1_CH4, GPIO5, MTDI, FSPID GPIO, ADC pin |
| 8ID 8 | —Position L9 | 3.3 Vgpio5 V tolerant: noMax drive 28 mA | onboard WS2812 RGB LED, strapping (boot mode / ROM log), floating by default, GPIO8 GPIO, LOG |
| 9ID 9 | —Position R9 | 3.3 Vgpio5 V tolerant: noMax drive 28 mA | BOOT button (low at reset = download mode), strapping (boot mode), weak pull-up, GPIO9 GPIO, BOOT |
| 10ID 10 | —Position R8 | 3.3 Vgpio5 V tolerant: noMax drive 28 mA | ZCD0 (zero-cross detect), GPIO10 GPIO |
| 11ID 11 | —Position R7 | 3.3 Vgpio5 V tolerant: noMax drive 28 mA | ZCD1 (zero-cross detect), GPIO11 GPIO |
| 12ID 12 | —Position R6 | 3.3 Vgpio5 V tolerant: noMax drive 28 mA | GPIO12 GPIO |
| 13ID 13 | —Position R5 | 3.3 Vgpio5 V tolerant: noMax drive 28 mA | blue user LED, XTAL_32K_P, GPIO13 GPIO, LED |
| 14ID 14 | —Position R4 | 3.3 Vgpio5 V tolerant: noMax drive 28 mA | XTAL_32K_N, GPIO14 GPIO |
| 22ID 22 | —Position inner pad | 3.3 Vgpio5 V tolerant: noMax drive 28 mA | GPIO22 GPIO |
| 24ID 24 | —Position L1 | 3.3 Vgpio5 V tolerant: noMax drive 28 mA | TX (UART0), GPIO24, U0TXD, FSPICS2 TX |
| 23ID 23 | —Position L2 | 3.3 Vgpio5 V tolerant: noMax drive 28 mA | RX (UART0), GPIO23, U0RXD, FSPICS1 GPIO |
| 25ID 25 | —Position inner pad | 3.3 Vgpio5 V tolerant: noMax drive 28 mA | strapping (JTAG source), floating by default, GPIO25, FSPICS3 GPIO |
| 26ID 26 | —Position inner pad | 3.3 Vgpio5 V tolerant: noMax drive 28 mA | USB_D-, GPIO26, FSPICS4 GPIO |
| 27ID 27 | —Position inner pad | 3.3 Vgpio5 V tolerant: noMax drive 28 mA | USB_D+, GPIO27, FSPICS5 GPIO |
Board → chip mapping
A board label, a chip signal ID and a package lead number are different identifiers.
| Board connection | Chip instance | Chip signal | Package lead | Route |
|---|---|---|---|---|
0 | ESP32-H2FH4SInstance ea0055c1-998a-5ef4-922b-285491fd2839--mcu | GPIO0ID GPIO0 | — | direct |
1 | ESP32-H2FH4SInstance ea0055c1-998a-5ef4-922b-285491fd2839--mcu | GPIO1ID GPIO1 | — | direct |
2 | ESP32-H2FH4SInstance ea0055c1-998a-5ef4-922b-285491fd2839--mcu | GPIO2ID GPIO2 | — | direct |
3 | ESP32-H2FH4SInstance ea0055c1-998a-5ef4-922b-285491fd2839--mcu | GPIO3ID GPIO3 | — | direct |
4 | ESP32-H2FH4SInstance ea0055c1-998a-5ef4-922b-285491fd2839--mcu | GPIO4ID GPIO4 | — | direct |
5 | ESP32-H2FH4SInstance ea0055c1-998a-5ef4-922b-285491fd2839--mcu | GPIO5ID GPIO5 | — | direct |
8 | ESP32-H2FH4SInstance ea0055c1-998a-5ef4-922b-285491fd2839--mcu | GPIO8ID GPIO8 | — | direct |
9 | ESP32-H2FH4SInstance ea0055c1-998a-5ef4-922b-285491fd2839--mcu | GPIO9ID GPIO9 | — | direct |
10 | ESP32-H2FH4SInstance ea0055c1-998a-5ef4-922b-285491fd2839--mcu | GPIO10ID GPIO10 | — | direct |
11 | ESP32-H2FH4SInstance ea0055c1-998a-5ef4-922b-285491fd2839--mcu | GPIO11ID GPIO11 | — | direct |
12 | ESP32-H2FH4SInstance ea0055c1-998a-5ef4-922b-285491fd2839--mcu | GPIO12ID GPIO12 | — | direct |
13 | ESP32-H2FH4SInstance ea0055c1-998a-5ef4-922b-285491fd2839--mcu | GPIO13ID GPIO13 | — | direct |
14 | ESP32-H2FH4SInstance ea0055c1-998a-5ef4-922b-285491fd2839--mcu | GPIO14ID GPIO14 | — | direct |
22 | ESP32-H2FH4SInstance ea0055c1-998a-5ef4-922b-285491fd2839--mcu | GPIO22ID GPIO22 | — | direct |
24 | ESP32-H2FH4SInstance ea0055c1-998a-5ef4-922b-285491fd2839--mcu | GPIO24ID GPIO24 | — | direct |
23 | ESP32-H2FH4SInstance ea0055c1-998a-5ef4-922b-285491fd2839--mcu | GPIO23ID GPIO23 | — | direct |
25 | ESP32-H2FH4SInstance ea0055c1-998a-5ef4-922b-285491fd2839--mcu | GPIO25ID GPIO25 | — | direct |
26 | ESP32-H2FH4SInstance ea0055c1-998a-5ef4-922b-285491fd2839--mcu | GPIO26ID GPIO26 | — | direct |
27 | ESP32-H2FH4SInstance ea0055c1-998a-5ef4-922b-285491fd2839--mcu | GPIO27ID GPIO27 | — | direct |
ESP32-H2FH4S · chip pins
Chip signals stay attached to their chip instance, including their package lead and board exposure.
Chip package pins have not been transcribed for this instance.
Specifications
Board electrical limits
Supply voltage and GPIO logic voltage describe different parts of the design.
- I/O voltage
- 3.3 V
- Supply voltage range
- 5 to 5 V
- Nominal supply
- 5 V
- Logic high minimum
- 2.475 V
- Per-pin drive limit
- 28 mA
| Input | Voltage range | Connector | Notes |
|---|---|---|---|
| 5V | Unknown | — | 5V power input for the board |
A 5 V supply input does not establish 5 V tolerance on GPIO. Check the documented power input and logic domain for each connection.
Board-level capabilities
These describe the assembled board. Interface counts do not guarantee simultaneous operation.
| Interface | Support | Count | Details |
|---|---|---|---|
| gpio | Documented | Unknown | 0, 1, 2, 3, 4, 5, 8, 9, 10, 11, 12, 13, 14, 22, 24, 23, 25, 26, 27 |
| spi | Documented | Unknown | 0, 1, 2, 3, 4, 5, 24, 23, 25, 26, 27 |
| adc | Documented | 5 | 1, 2, 3, 4, 5count stated in datasheet (adc_channels) |
| jtag | Documented | Unknown | 2, 3, 4, 5 |
| led | Documented | Unknown | 8, 13 |
| control | Documented | Unknown | 8, 9, 25 |
| other | Documented | Unknown | 10, 11 |
| clock | Documented | Unknown | 13, 14 |
| uart | Documented | Unknown | 24, 23 |
| usb | Documented | Unknown | 26, 27 |
Memory on the board
Board capacity includes installed memory; chip-local memory is listed separately under each processor.
- Flash
- 4 MiB
- SRAM
- 320 KiB
Capacities use KiB / MiB (1024-based units). Firmware partitions and runtime allocations reduce application-available memory.
Thermal limits by level
Product operating conditions, chip ambient ratings, package case limits and junction maxima remain separate.
Assembled board
ESP32-H2FH4S · main processor
Mechanical dimensions
Reported product dimensions may exclude protruding components. Unknown height does not establish a complete clearance envelope.
- Length
- 24 mm
- Width
- 18.4 mm
Attached generated geometry is an approximate envelope. A generated outline does not establish an electrically verified PCB footprint.
Board connectors
| ID / type | Pins | Pitch | Notes |
|---|---|---|---|
| usbUSB Type-C (power + native USB Serial/JTAG) | Unknown | Unknown | — |
| header2 × 9 edge pads (TX RX 0–5 8 | 5V GND 3V3 14 13 12 11 10 9), plus inner pads 26 27 25 22 and back B+ / B− pads | 22 | Unknown | — |
Software and certifications
- Software frameworks
- Arduino IDE, ESP-IDF, ESPHome
Complete structured record
Every available field, including details beyond the summaries. Null means the value has not been established.
Sourcing & files
Supplier offers
US / USD is the target market. Observed price and stock are separate from a delivery quote.
ameridroid.com
US · USD
$6.95Minimum quantity unknown
- Observed stock
- in stock
- Checked
- Oct 18, 2026, 06:41 AM UTC
- Delivery estimate
- Not quoted
This observation is stale or has no verified check time. Recheck with the supplier.
Visit supplier (opens in a new tab)Delivery depends on quantity, postal code and shipping method. A dispatch statement such as “ship today” is not an arrival estimate.
Design files and references
Each source keeps its own verification status. Confirm the part revision and file contents before using it in a design.
Datasheet (opens in a new tab)
Manufacturer reference
ESP32-H2 SuperMini front and back with headers (Ameridroid) (opens in a new tab)
Unverified reference
inspected: blue PCB, USB-C, BOOT and RST buttons, RGB LED, ESP32-H2 QFN, ceramic antenna 'C3' at the far end; edge pads TX RX 0–5 8 / 5V GND 3V3 14 13 12 11 10 9, inner pads 26 27 25 22, back B+ B− pads and 'Super Mini ESP32-H2' label; retailer photo
STEP (generated from datasheet drawing) — link unavailable
Generated asset
cad_check passed
Generated envelope geometry may also exist for this record. It does not replace manufacturer CAD or a verified electrical land pattern.
Source evidence
Document provenance, retrieval dates and the field groups supported by each source.
Supports: spec.constraints.electrical.io_voltage_v, spec.constraints.electrical.logic_high_min_v, spec.constraints.electrical.pin_drive_max_ma, spec.constraints.electrical.supply_voltage_max_v, spec.constraints.electrical.supply_voltage_min_v, spec.constraints.electrical.supply_voltage_nominal_v, spec.geometry.cad.assumptions, spec.geometry.cad.bbox.height_mm, spec.geometry.cad.bbox.length_mm, spec.geometry.cad.bbox.width_mm, spec.geometry.cad.envelope_complete, spec.geometry.cad.mesh_path, spec.geometry.cad.step_path, spec.geometry.cad.verification, spec.geometry.dimensions.length_mm, spec.geometry.dimensions.width_mm, spec.provides.capabilities, spec.provides.features, spec.provides.gpio_count, spec.provides.memory.flash_kb, spec.provides.memory.sram_kb, spec.provides.software_frameworks, spec.provides.wireless, spec.usage.connectors, spec.usage.pin_mappings, spec.usage.pinout, spec.usage.pinout_complete, spec.usage.requirements.power_inputs
sha256 713f5bd8d754800fa97692799dcc0646a95092573a8192adce85b61febf47b2b
Supports: offers
FAQ
ESP32-H2 SuperMini Dev Board questions
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 — Generic (unbranded)
- ameridroid.com listing