ESP32-H21 is a low-power wireless SoC designed for battery-operated IoT devices based on Thread, Zigbee, Matter and BT Low Energy. As an incremental evolution of the ESP32-H2 platform, ESP32-H21 integrates an on-chip DC-DC converter to further reduce active power consumption, helping extend battery life in always-connected sensor and control applications. ESP32-H21 is also well suited for smart-home sensors, building automation, wearables, and other power-sensitive endpoints.

• Low-Power Wireless Connectivity: Integrates IEEE 802.15.4 and BT Low Energy in a single SoC, enabling Thread and Zigbee-based mesh networking, BT and BT mesh for scalable multi-node deployments, while also supporting low-power point-to-point communication.
• Extended Range and Link Reliability: Supports up to 20 dBm transmit power, enabling improved wireless range and stronger link budgets in dense or interference-prone environments.
• System Architecture and Peripherals: Built around a 32-bit RISC-V microcontroller with comprehensive peripheral support for flexible system integration.
• Software and Ecosystem Support: Supported by ESP-IDF development framework with access to mature SDK, development tools, and comprehensive documentation including ESP-Matter SDK.