# ESP32

*Platform / Hardware host*

> ESP32 is Espressif's family of Wi-Fi and Bluetooth microcontrollers. What it does in a smart home depends on its firmware. Espressif's SDKs cover Matter over Wi-Fi and Thread, Zigbee and Thread border routers. Thread and Zigbee need a chip with an 802.15.4 radio, such as ESP32-C6 or ESP32-H2.[^1][^2][^3][^4][^5][^6]

- Canonical page: https://smarthomecanon.com/platforms/esp32
- Last checked: 2026-10-09

## Key facts

| Fact | Value |
| --- | --- |
| Type | Hardware host |
| Capabilities | 8 |
| Devices | 0 |

## Capabilities

**What ESP32 supports**

| Capability | Supported | Since |
| --- | --- | --- |
| Wi-Fi with local control | Yes[^1] | unknown |
| Bluetooth Low Energy | Yes[^1] | unknown |
| Matter over Wi-Fi | Yes[^7][^2] | unknown |
| Matter over Thread | Yes[^5][^6][^2] | unknown |
| Zigbee | Yes[^5][^6][^4] | unknown |
| Thread border router | Yes[^3][^8] | unknown |
| Matter through a bridge | Yes[^2] | unknown |
| Bluetooth proxy | withheld | unknown |

## What it is

It is a hardware host. What it does in a smart home depends on the firmware: Espressif's SDKs, ESPHome or Tasmota.[^1]

The family splits by radio. The original ESP32 and the S-series have Wi-Fi and Bluetooth. ESP32-C6 adds Wi-Fi 6 and an IEEE 802.15.4 radio for Thread and Zigbee. ESP32-H2 has 802.15.4 and Bluetooth LE but no Wi-Fi, so Espressif pairs it with a Wi-Fi chip to build border routers and bridges.[^1][^5][^6]

## Which paths it supports

Espressif's ESP-Matter SDK is built on the open-source Matter SDK. It makes Matter over Wi-Fi devices on ESP32, C-series and S-series chips, and Matter over Thread devices on the H-series, C5 and C6. It also covers Thread border routers and Matter bridges for Zigbee and BLE Mesh devices.[^2]

The ESP Thread Border Router SDK is Thread 1.4 certified. Its reference board pairs an ESP32-S3 host with an ESP32-H2 radio co-processor. The ESP Zigbee SDK runs on ESP32-H2 and ESP32-C6 as a coordinator, router or end device, to Zigbee 3.0 and Zigbee PRO R23.[^3][^8][^4]

Flashed with ESPHome, an ESP32 can also be a Bluetooth proxy that extends Home Assistant's BLE reach.[^9]

## Local or cloud

Matter, Thread and Zigbee built on these SDKs run on the local network. Whether a finished product uses a cloud service is the maker's choice.[^2][^3]

## Limitations

- Only chips with an 802.15.4 radio (H-series, C5, C6) can join Thread or Zigbee. The original ESP32 cannot.[^5][^6][^2]
- ESP32-H2 has no Wi-Fi, so a border router or bridge built on it needs a second, Wi-Fi-capable Espressif chip.[^6]

## Sources

[^1]: ESP32 Wi-Fi & Bluetooth SoC - Espressif Systems. https://www.espressif.com/en/products/socs/esp32 (manufacturer, checked 2026-10-09)
[^2]: Introduction - ESP Matter Programming Guide. https://docs.espressif.com/projects/esp-matter/en/latest/esp32/introduction.html (platform documentation, checked 2026-10-09)
[^3]: ESP Thread Border Router SDK. https://docs.espressif.com/projects/esp-thread-br/en/latest/ (platform documentation, checked 2026-10-09)
[^4]: Introduction - ESP Zigbee SDK. https://docs.espressif.com/projects/esp-zigbee-sdk/en/latest/esp32/introduction.html (platform documentation, checked 2026-10-09)
[^5]: ESP32-C6 Wi-Fi 6 & BLE 5 & Thread/Zigbee SoC - Espressif Systems. https://www.espressif.com/en/products/socs/esp32-c6 (manufacturer, checked 2026-10-09)
[^6]: ESP32-H2 - Espressif. https://www.espressif.com/en/products/socs/esp32-h2 (manufacturer, checked 2026-10-09)
[^7]: Programming Guide - ESP-Matter - Espressif. https://docs.espressif.com/projects/esp-matter/en/latest/esp32/ (manufacturer, checked 2026-10-09)
[^8]: Hardware Platforms - ESP Thread Border Router SDK. https://docs.espressif.com/projects/esp-thread-br/en/latest/hardware_platforms.html (platform documentation, checked 2026-10-09)
[^9]: Bluetooth Proxy - ESPHome. https://esphome.io/components/bluetooth_proxy/ (platform documentation, checked 2026-10-09)