Licenses & Source

The browser flasher installs pre-compiled firmware binaries onto your device over USB. Because those binaries are distributed here, this page lists the open-source projects bundled into each firmware image, with links to their source code and license terms. Everything is provided as-is; refer to each project for its full terms.

ESPHome firmware

The ESPHome .bin images are compiled with the ESPHome toolchain on the ESP-IDF framework, together with the Mitsubishi CN105 component stack.

Component	License	Source & license
ESPHome	MIT + GPLv3	Source · License
MitsubishiCN105ESPHome (echavet)	None declared	Source
esphome-mitsubishiheatpump (geoffdavis)	BSD-2-Clause	Source · License
SwiCago/HeatPump	GPL-3.0 / LGPL-3.0	Source · License
ESP-IDF (build framework)	Apache-2.0	Source · License

ESPHome is dual-licensed: its Python tooling is MIT, and its C++/runtime code — compiled into the firmware — is GPLv3.
SwiCago/HeatPump ships the GPL-3.0 license text in its repository, while its README states LGPL-3.0.
MitsubishiCN105ESPHome does not include a license file.
Corresponding source for the exact ESPHome build is published at Serin-Labs/serin-cn105.

HomeKit firmware

The HomeKit-compatible .bin images are built on Espressif's HomeKit SDK and the ESP-IDF framework.

Component	License	Source & license
esp-homekit-sdk (Espressif)	ESPRESSIF MIT License; mu_srp under Apache-2.0	Source · License · mu_srp
ESP-IDF	Apache-2.0	Source · License

Flashing tool

The flash page runs entirely in your browser, using the open-source ESP Web Tools library to write firmware over USB.

Component	License	Source & license
ESP Web Tools (esp-web-tools)	Apache-2.0	Source · License