Open firmware.
Ready to learn from and build on.
ESPFlight Firmware is released under the MIT License, a short permissive open-source license that allows learning, modification, redistribution, and commercial use while requiring preservation of the copyright and license notice.
This page includes the complete MIT License text used for ESPFlight Firmware. Brand rights are separate from the software license.
What this means for ESPFlight builders.
A short practical summary is provided below. The full MIT License text is the controlling license.
Use it for learning or products
You may use ESPFlight Firmware in personal, educational, experimental, prototype, and commercial projects or products subject to the MIT License.
Modify and redistribute it
You may fork, change, copy, merge, publish, distribute, and sublicense ESPFlight Firmware under the MIT License terms.
Keep the license notice
Copies or substantial portions of the software must include the copyright notice and MIT License permission notice.
Brand rights stay separate
The firmware license does not grant unrestricted rights to the ESPFlight name, logo, visual identity, or other brand assets. See the Brand Policy.
MIT License
Complete license text. If any ESPFlight summary conflicts with this license, the MIT License text controls.
MIT License Copyright (c) 2026 ESPFlight Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.