ESP32-H21-MINI-1-H4 - WiFi/BLE/IoT ESP32-H21 module, PCB antenna - ESPRESSIF SYSTEMS
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ESP32-H2-MINI-1-H4 – Multi-Protocol Matter/Zigbee/Thread Module (4 MB Flash, Bluetooth 5.3)
The ESP32-H2-MINI-1-H4 is Espressif Systems’ pioneering solution for the smart home technologies of the future. This module is the first ESP32 variant to forgo traditional Wi-Fi in order to focus all its resources on the IEEE 802.15.4 standard (Zigbee, Thread) and Bluetooth 5.3 (LE) connectivity. With its built-in 4 MB of flash memory and an extended operating temperature range of up to 105°C, it can withstand even the most demanding industrial and home environments.
Key Product Features
- RISC-V Architecture: 32-bit RISC-V single-core microprocessor with a clock speed of up to 96 MHz for energy-efficient operation.
- Matter support: Thanks to its native Thread and Bluetooth LE capabilities, it serves as the cornerstone for modern, cross-platform Matter devices.
- Advanced wireless protocols: Bluetooth 5.3, Zigbee 3.0, and Thread 1.3 support for building mesh networks.
- High-level security: Hardware encryption (AES-128/256), RSA accelerator, SHA, Secure Boot, and Digital Signature support.
- Compact size: Small footprint characteristic of the MINI series, with an integrated PCB antenna for space-saving installation.
Technical Specifications
| Parameter | Value / Description |
|---|---|
| Model Number | ESP32-H2-MINI-1-H4 |
| Flash Memory | 4 MB (Integrated) |
| Wireless | Bluetooth 5.3 + IEEE 802.15.4 (Zigbee/Thread) |
| Supply Voltage | 3.0 V ~ 3.6 V |
| Operating Temperature | Between -40°C and 105°C (H4 variant) |
| SRAM / ROM | 320 KB SRAM / 128 KB ROM |
| Dimensions | 13.2 × 16.6 × 2.4 mm |
Why choose the ESP32-H2-MINI-1-H4 module?
This module is the answer to the growing adoption of the Matter standard. Since it uses the Thread protocol instead of Wi-Fi for low-power endpoints, devices can operate on battery power for months or even years. The H4 designation indicates an extended temperature range, making this module an excellent choice for professional lighting equipment (where internal temperatures are high) or outdoor sensors.
Applications:
- Matter-compatible smart home endpoints
- Zigbee-based building automation and lighting control
- Add-on module for Thread border routers
- Ultra-low-power mesh sensor networks
The ESP32-H2-MINI-1-H4 is a future-proof choice if you’re developing a device that needs to communicate seamlessly with the Apple Home, Google Home, or Amazon Alexa ecosystems using the latest protocols.

