Custom firmware and restoring factory firmware¶

Flashing custom firmware¶

Home Assistant Connect AUX-2 uses an ESP32-S3 with an unlocked bootloader. It ships with firmware built on ESPHome, and you can flash your own custom firmware. The firmware source is the starting point. For building and distributing a custom build, see Building ESPHome components.

Custom firmware is optional.

Install your own firmware over USB the first time. The EN 18031 cybersecurity standard requires this.

Restoring the factory firmware¶

To return to the factory firmware after running custom firmware, use the web installer.