Add ESP32-S3 and ESP32-H2 firmware to esp-hosted-firmware repository (ESP Thread Border Router board)

[el-bakkali]

Component name

esp32_hosted

Link to component documentation on our website

https://esphome.io/components/esp32_hosted/

Describe the enhancement

Add precompiled firmware for ESP32-S3 (host) and ESP32-H2 (co-processor) to enable support for the ESP Thread Border Router Board

A ready made project here would be amazing to bring functionality to this board https://esphome.io/projects/

Use cases

Why this matters:

• This is Espressif's official Thread Border Router reference design (S3 + H2)
• It's Thread 1.3 certified
• The board is cheap (~$20) and widely available
• Currently requires building from source via esp-idf + esp-thread-br, which is complex for end users

Use case: Ready-to-flash Thread/Matter border router for Home Assistant without needing to compile firmware manually.

Anything else?

References:

• ESPHome esp32_hosted docs
• ESP Thread Border Router docs
• esp-thread-br GitHub
• Espressif Thread BR dev blog

[github-actions[bot]]

🏷️ I've automatically added the component: esp32_hosted label to help categorize this feature request.

[el-bakkali]

To add some more context, this seems like a good opportunity to bring native OpenThread Border Router support to ESPHome, especially with Matter adoption growing.

I've checked and ESPHome already provides precompiled binaries for the esp-hosted architecture here:
https://github.com/esphome/esp-hosted-firmware

Currently there's firmware for ESP32 and C6, but none for S3 or H2. Adding support for the S3+H2 combo would unlock the official Espressif Thread Border Router board, which is Thread 1.3 certified and costs ~$20.

The infrastructure is already there, it's just missing the S3/H2 builds.

I've also submitted this as a feature request on the ESPHome GitHub for better visibility with maintainers.