ESP32-H2 RISC-V WiSoC announced with Zigbee 3, Thread, and Bluetooth LE 5.2

Just a few days ago, we noted ESP32-H2 802.15.4 & BLE RISC-V SoC had shown up in the source code, and tried to derive specs and a block diagram from the info seeing it was similar to ESP32-C3, but swapping the WiFi radio for an 802.15.4 radio.

We don’t need to guess anymore, as Espressif Systems has just announced ESP32-H2 RISC-V WiSoC with support for Zigbee 3.x, Thread 1.x through the 802.15.4 radio, as well as Bluetooth LE 5.2.

ESP32-H2 with Thread, Zigbee 3, BLE 5.2So overall it’s very close to what we discussed from the information in the source code with ESP32-H2 highlights including:

  • CPU – 32-bit RISC-V core (at up to 96 MHz)
  • RAM – 256 KB SRAM
  • Storage – External flash support
  • Wireless connectivity
    • IEEE 802.15.4 radio with Zigbee 3.x and Thread 1.x support, Matter protocol
    • Bluetooth 5.2 (LE) radio designed in-house, with support for direct connection, Bluetooth Mesh, Bluetooth LE Audio
    • Future support for Matter protocol (previously Project CHIP) using either radio
  • Peripherals – 26x programmable GPIOs with support for ADC, SPI, UART, I2C, I2S, RMT, GDMA, and PWM
  • Security – ECC-based secure boot, AES-128/256-XTS-based flash encryption, digital signature, HMAC peripheral for identity protection, cryptographic accelerators
  • Integrated DC-DC converter for ultra-low-power, energy-efficient operation.

ESP32-H2 will be supported through Espressif’s IoT Development Framework (ESP-IDF), and you can check out the software development progress on Github.

That’s about all we know at this stage, no information about availability, modules, or development boards. ESP32-H2 is the first wireless SoC from the company that does not use WiFI, and it will specifically target low-power Smart Home applications.

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