OpenQuatt / Main Channel

Install the latest stable firmware without hunting for binaries.

Choose your setup and hardware profile, then flash the matching OpenQuatt factory image over USB. OTA updates stay on the existing GitHub Release flow after first boot.

Pick your setup

This decides whether the firmware runs in Single or Duo topology.

Single Single heat pump topology with Duo-only logic compiled out. Duo Two heat pumps enabled in the compiled topology.

Pick your ESP module

This decides the exact board mapping and factory image to flash.

Waveshare ESP32-S3-Relay-1CH board using the ESP32-S3 build. Heatpump Listener ESP32 Heatpump Listener board using the ESP32 build.

Selected Firmware

Choose setup and hardware first

The installer will generate a one-off ESP Web Tools manifest for the exact profile you pick here.

Stable Version: Loading...
Setup: Not selected
Hardware: Not selected
Chip Family: Not selected
Factory Image: Not selected

Finish both selections to unlock the installer.

Web Serial is not available in this browser. Use Chrome or Edge on desktop. Open the installer over HTTPS to access Web Serial.

Manual fallback

Open the latest stable release Flash a downloaded factory binary in ESP Web Tools