ESP32-H21
Announced ultra-low-power mesh SoC
An announced H2 evolution with Bluetooth LE, 802.15.4 and an integrated DC-DC converter.
Best for
- Future battery-powered Thread and Zigbee endpoints
Avoid for
- Production-only schedules or Wi-Fi products
CPU & memory
- Architecture
- RISC-V
- Core(s)
- 1
- Maximum clock
- Not confirmed
- On-chip SRAM
- Not confirmed
- ROM
- Not confirmed
- Flash
- In-package by part
- PSRAM
- Not confirmed
- Packages
- Not confirmed
Wireless
- Wi-Fi
- None
- Wi-Fi max rate
- Not confirmed
- Bluetooth
- Bluetooth 5 LE
- IEEE 802.15.4
- Yes
Interfaces
- USB OTG
- No
- USB Serial/JTAG
- Yes
- Ethernet MAC
- No
- Camera
- No
- Display
- No
- SD/MMC
- No
- Maximum GPIO
- Not confirmed
Security
- Secure boot
- Not confirmed
- Flash encryption
- Not confirmed
- Crypto accelerators
- Not confirmed
- TEE / APM
- Not confirmed
Analog & power
- ADC channels
- Not confirmed
- ADC resolution
- Not confirmed
- Touch sensing
- Not confirmed
- Touch channels
- Not confirmed
- Supply voltage
- Not confirmed
- ULP core
- Not confirmed
- Deep-sleep current
- Not confirmed
Lifecycle & timing
- Announced
- 2026-03-03
- Mass production
- Not confirmed
- NRND
- Not confirmed
- EOL
- Not confirmed
Official modules
Every official ESP32 base module, grouped by series. Status follows the ordering codes; "Mixed" means they differ.
| Module | Status | Form factor | Antenna | Flash | PSRAM |
|---|---|---|---|---|---|
| ESP32-H21-MINI-1 | Officially listed | MINI | PCB | Not confirmed | Not confirmed |
Official development boards
Official Espressif development boards, including discontinued boards from the per-series EOL lists.
| Board | Status | Board type |
|---|---|---|
| ESP32-H21-DevKitM-1 | Officially listed | DevKitM |
Where to buy
Official page and distributor search
These are search and official pages, not live stock or price quotes. Confirm the exact ordering code with the seller.
Official chip ordering codes
Each row is an official SoC or SiP. Buy links search that exact part name.
| Part | Status | Package | Flash | PSRAM | Buy |
|---|---|---|---|---|---|
| ESP32-H21HF4 | Announced | Package data pending | See datasheet | None confirmed | Search LCSCSearch Digi-KeySearch Mouser |
Chip package
Chip pin map
Package top view from the official series datasheet. Filter pins or open the accessible table. This is a reference map, not an electrical simulator.
Authority boundary
Official pin data pending
Espressif has not yet published enough package pin data for an authoritative interactive map.
Last checked: 2026-10-11Official evidence
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