ESP32-H4
SoCSpecifications
Radios
- Wi-Fi
- none
- Bluetooth LE
- BLE 5.4
- Bluetooth Classic
- no
- 802.15.4
- Thread 1.4, Zigbee 3.0
USB
- Native USB
- yes
- USB type
- otg
CPU
- Architecture
- risc-v
- Cores
- 2
- Max clock
- 96 MHz
- Extensions
- dsp
Memory
- SRAM
- 384 KB
- ROM
- 128 KB
- External PSRAM
- yes
Security
- Features
- secure-bootmemory-encryptionecdsa-dscrypto-acceleratorstrng
Newest H-series: no Wi-Fi, dual-core, and the highest Bluetooth in the family — BLE 5.4 with LE Audio, ISO channels, PAwR, and Direction Finding (AoA/AoD) — plus 802.15.4. Ultra-low-power for coin-cell devices.
Frequently asked questions
What are the ESP32-H4 specs / datasheet?
ESP32-H4 is a dual-core RISC-V SoC clocked up to 96 MHz. It has 384 KB of SRAM and 128 KB of ROM. Radios: no Wi-Fi radio, Bluetooth LE 5.4, and an 802.15.4 radio. It exposes native USB (Serial/JTAG).
What is the ESP32-H4 pinout / GPIO count?
The ESP32-H4 has 40 GPIO pads in total.
What wireless radios does the ESP32-H4 have?
ESP32-H4's wireless radios: Wi-Fi: no Wi-Fi radio. Bluetooth: Bluetooth LE 5.4. 802.15.4: 802.15.4 radio (thread-1.4, zigbee-3.0).
Does the ESP32-H4 have a low-power (LP) core?
No -- the ESP32-H4 has no separate low-power (LP) core; only its main CPU core (up to 96 MHz).
ESP32-H4 vs ESP32-H2: what's different?
The ESP32-H4 is a dual-core RISC-V SoC at up to 96 MHz (384 KB SRAM); the ESP32-H2 is a single-core RISC-V SoC at up to 96 MHz (320 KB SRAM). Wi-Fi: no Wi-Fi vs no Wi-Fi. Bluetooth: BLE 5.4 vs BLE 5.3. 802.15.4: 802.15.4 yes vs 802.15.4 yes. Low-power core: LP core no vs LP core no.
Notes
- No Wi-Fi radio
- Product page notes Bluetooth 6.0 certification; functional core spec is BLE 5.4
- Ultra-low-power: integrated DC-DC, multiple low-power modes
- No public datasheet or Hardware Design Guidelines page exists yet for ESP32-H4 (checked 2026-08-26) — drive currents and reserved_pins omitted, not guessed. gpio_pads_total=40 is the product-page GPIO count for the bare-die SKUs.