ESP32-H4

( number of products: 3 )

ESP32-H4 is an advanced, low-power, dual-core 32-bit SoC based on the RISC-V architecture, combining Bluetooth 5.4 (LE) and IEEE 802.15.4 support in a single device. Designed for next-generation battery-powered products, it combines robust security, flexible memory support, and energy-efficient operation, making it suitable for more demanding low-power applications. The ESP32-H4 is ideal for wearables, wireless audio products, medical devices, and extensive low-power sensor networks.

ESP32-H4 Main Features

Wireless connectivity and Bluetooth 5.4 (LE)

The ESP32-H4 combines Bluetooth 5.4 (LE) and IEEE 802.15.4 modules in a single SoC, providing full support for all features of the Bluetooth 5.4 (LE) core specification as well as Bluetooth 6.0 certification compliance. The Bluetooth subsystem supports advanced features, including LE Audio, LE Isochronous Channels (BIS/CIS), connection subrating, Periodic Advertising with Responses (PAwR), and direction finding (AoA/AoD). These features enable the development of energy-efficient audio products, indoor positioning, and large-scale deployments of beacons and sensors. The 802.15.4 subsystem supports Thread 1.4 and Zigbee 3.0, enabling Matter-over-Thread and other mesh-based applications.

System and memory

The ESP32-H4 is based on a dual-core 32-bit RISC-V microcontroller, operating at up to 96 MHz and equipped with integrated DSP extensions. It includes 384 KB of SRAM and 128 KB of ROM, and supports external memory. The SoC also supports external PSRAM, allowing developers to run memory-intensive applications such as LE Audio buffering, complex protocol stacks, data logging, or sensor fusion. This flexibility simplifies application development and improves future readiness for feature updates.

Low-power operation with an integrated DC-DC converter

The ESP32-H4 is optimized for ultra-low-power operation. The integrated DC-DC converter improves overall efficiency through lower supply voltages and effective power regulation. Combined with multiple power-saving modes and selective peripheral activation, the ESP32-H4 enables devices to operate for extended periods on small batteries, such as coin cells or rechargeable batteries. The reduced maximum transmit power further lowers RF current consumption, while Bluetooth LE optimizations — such as advertising without CPU involvement — make the ESP32-H4 highly suitable for battery-powered sensors, wearables, LE Audio accessories, and Matter-over-Thread devices.

Affordable security

In line with Espressif’s philosophy of affordable security, the ESP32-H4 offers secure boot, memory encryption, digital signature (ECDSA), cryptographic accelerators, and a true random number generator. These hardware security features protect private keys and sensitive data, ensuring secure communication and firmware integrity even in cost-sensitive designs, while helping developers meet modern IoT network security requirements.

Optimized peripherals and HMI interaction

The ESP32-H4 offers up to 40 GPIOs, covering standard microcontroller peripherals such as I2C, I2S, SPI, UART, LED PWM, ADC, timers, DMA, TWAI, USB-OTG, and MCPWM. Specialized peripherals include the Event Task Matrix (ETM) for event-triggered task execution. With 15 GPIOs featuring touch sensing, the ESP32-H4 is well suited for human-machine interaction devices such as touch panels, smart switches, control knobs, and similar applications.

Software availability

The ESP32-H4 is fully supported by Espressif’s open-source ESP-IDF platform, giving developers access to a proven SDK, tools, and extensive documentation. For Bluetooth Low Energy application development, the module integrates seamlessly with Espressif’s Bluetooth LE software ecosystem, including the ESP-BLE-MESH and ESP-BLE-AUDIO libraries, helping developers accelerate time to market across a wide range of BLE applications. In addition, ESP-Matter will provide support for the ESP32-H4, enabling the development of battery-powered Matter-compatible devices with Thread connectivity. Customers using the ESP32-H4 as a connectivity co-processor can also benefit from firmware solutions such as ESP-AT and ESP-Hosted.

ESP32-H4 Series Chips and Modules

32-bit RISC-V MCU with Bluetooth 5.4 (LE) and IEEE 802.15.4

Dual-core 32-bit RISC-V processor clocked at up to 96 MHz, equipped with DSP extensions for efficient signal processing in low-power applications
Support for LE Audio, BIS/CIS, PAwR, and direction finding (AoA/AoD)
384 KB SRAM, 128 KB ROM, and support for external PSRAM for memory-intensive applications such as LE Audio buffering and data logging
Rich set of peripherals, including 40 GPIOs, I2C, I2S, SPI, UART, CAN FD, LED PWM, ADC, DMA, USB-OTG, MCPWM, and 15 touch-sensing GPIOs for intuitive HMI design
Integrated DC-DC converter, multiple low-power modes, and RF optimizations for extended battery life
Security features include secure boot, memory encryption, ECDSA digital signature, cryptographic accelerators, and a true random number generator