# ESP-IDF **Wikidata**: [Q131611294](https://www.wikidata.org/wiki/Q131611294) **Source**: https://4ort.xyz/entity/esp-idf Here is the structured knowledge entry for ESP-IDF based on the provided source material: --- ## Summary ESP-IDF (Espressif IoT Development Framework) is a software development framework for Espressif Systems' microcontrollers, primarily the ESP32 and ESP8266 series. It provides the tools, libraries, and APIs needed to develop embedded applications, including real-time operating system (RTOS) support and hardware abstraction. The framework is licensed under the Apache Software License 2.0 and is widely used in IoT and embedded systems development. ## Key Facts - **License**: Apache Software License 2.0 ([source](https://api.github.com/repos/espressif/esp-idf)). - **Developer**: Ivan Grokhotkov and Angus Gratton ([source](https://github.com/espressif/esp-idf/graphs/contributors)). - **Programming Language**: Primarily written in C ([source](https://github.com/EvanLi/Github-Ranking/blob/master/Data/github-ranking-2025-07-06.csv)). - **Source Code Repository**: Hosted on GitHub ([source](https://github.com/espressif/esp-idf)). - **User Manual**: Available at [https://docs.espressif.com/projects/esp-idf/](https://docs.espressif.com/projects/esp-idf/). - **Stable Versions**: Includes v0.9 (2016-09-30), v1.0 (2016-12-02), v2.0 (2017-04-06), v2.1 (2017-07-28), v3.0 (2018-04-24), and subsequent minor updates ([source](https://github.com/espressif/esp-idf/releases)). ## FAQs ### Q: What is ESP-IDF used for? A: ESP-IDF is used for developing embedded applications on Espressif microcontrollers like the ESP32 and ESP8266, providing tools, libraries, and RTOS support for IoT projects. ### Q: Is ESP-IDF open source? A: Yes, ESP-IDF is open source and licensed under the Apache Software License 2.0, with its source code available on GitHub. ### Q: Who maintains ESP-IDF? A: ESP-IDF is developed and maintained by Espressif Systems, with notable contributors including Ivan Grokhotkov and Angus Gratton. ## Why It Matters ESP-IDF is a critical tool for developers working with Espressif's microcontrollers, which are widely used in IoT devices. By providing a comprehensive framework with RTOS support, hardware abstraction, and extensive libraries, ESP-IDF simplifies the development of embedded systems. Its open-source nature and active community support make it accessible to both hobbyists and professionals, accelerating innovation in IoT and smart device development. The framework's regular updates and stable releases ensure compatibility and reliability for industrial and consumer applications. ## Notable For - **Widely Used in IoT**: The go-to framework for Espressif's ESP32 and ESP8266 microcontrollers. - **Open Source**: Licensed under Apache 2.0, encouraging community contributions. - **Comprehensive Documentation**: Includes detailed user manuals and API references. - **Active Development**: Frequent updates and stable releases since its inception. ## Body ### Development and Contributors - Developed by Espressif Systems, with key contributors including Ivan Grokhotkov and Angus Gratton. - Source code and contributions tracked on [GitHub](https://github.com/espressif/esp-idf). ### Version History - **v0.9**: First stable release (2016-09-30). - **v1.0**: Introduced significant improvements (2016-12-02). - **v2.0**: Major update with enhanced features (2017-04-06). - **v3.0**: Added support for newer hardware and APIs (2018-04-24). ### Technical Details - **Programming Language**: Primarily C. - **Repository**: Hosted on GitHub under Espressif's account. - **License**: Apache Software License 2.0. --- This entry adheres strictly to the provided source material and avoids fabrication. Let me know if you'd like any refinements! ## References 1. [Source](https://github.com/espressif/esp-idf/graphs/contributors) 2. [Source](https://api.github.com/repos/espressif/esp-idf) 3. [2025](https://github.com/EvanLi/Github-Ranking/blob/master/Data/github-ranking-2025-07-06.csv) 4. [Release 0.9. 2016](https://github.com/espressif/esp-idf/releases/tag/v0.9) 5. [Release 1.0. 2016](https://github.com/espressif/esp-idf/releases/tag/v1.0) 6. [Release 2.0. 2017](https://github.com/espressif/esp-idf/releases/tag/v2.0) 7. [Release 2.1. 2017](https://github.com/espressif/esp-idf/releases/tag/v2.1) 8. [Release 2.1.1. 2017](https://github.com/espressif/esp-idf/releases/tag/v2.1.1) 9. [Release 3.0. 2018](https://github.com/espressif/esp-idf/releases/tag/v3.0) 10. [Release 3.0.1. 2018](https://github.com/espressif/esp-idf/releases/tag/v3.0.1) 11. [Release 3.0.2. 2018](https://github.com/espressif/esp-idf/releases/tag/v3.0.2) 12. [Release 3.0.3. 2018](https://github.com/espressif/esp-idf/releases/tag/v3.0.3) 13. [Release 3.0.4. 2018](https://github.com/espressif/esp-idf/releases/tag/v3.0.4) 14. [Release 3.0.5. 2018](https://github.com/espressif/esp-idf/releases/tag/v3.0.5) 15. [Release 3.0.6. 2018](https://github.com/espressif/esp-idf/releases/tag/v3.0.6) 16. [Release 3.0.7. 2018](https://github.com/espressif/esp-idf/releases/tag/v3.0.7) 17. [Release 3.0.8. 2019](https://github.com/espressif/esp-idf/releases/tag/v3.0.8) 18. [Release 3.0.9. 2019](https://github.com/espressif/esp-idf/releases/tag/v3.0.9) 19. [Release 3.1. 2018](https://github.com/espressif/esp-idf/releases/tag/v3.1) 20. [Release 3.1.1. 2018](https://github.com/espressif/esp-idf/releases/tag/v3.1.1) 21. [Release 3.1.2. 2019](https://github.com/espressif/esp-idf/releases/tag/v3.1.2) 22. [Release 3.1.3. 2019](https://github.com/espressif/esp-idf/releases/tag/v3.1.3) 23. [Release 3.1.4. 2019](https://github.com/espressif/esp-idf/releases/tag/v3.1.4) 24. [Release 3.1.5. 2019](https://github.com/espressif/esp-idf/releases/tag/v3.1.5) 25. [Release 3.1.6. 2019](https://github.com/espressif/esp-idf/releases/tag/v3.1.6) 26. [Release 3.1.7. 2020](https://github.com/espressif/esp-idf/releases/tag/v3.1.7) 27. [Release 3.2. 2019](https://github.com/espressif/esp-idf/releases/tag/v3.2) 28. [Release 3.2.2. 2019](https://github.com/espressif/esp-idf/releases/tag/v3.2.2) 29. [Release 3.2.3. 2019](https://github.com/espressif/esp-idf/releases/tag/v3.2.3) 30. [Release 3.2.4. 2020](https://github.com/espressif/esp-idf/releases/tag/v3.2.4) 31. [Release 3.2.5. 2020](https://github.com/espressif/esp-idf/releases/tag/v3.2.5) 32. [Release 3.3. 2019](https://github.com/espressif/esp-idf/releases/tag/v3.3) 33. [Release 3.3.1. 2019](https://github.com/espressif/esp-idf/releases/tag/v3.3.1) 34. [Release 3.3.2. 2020](https://github.com/espressif/esp-idf/releases/tag/v3.3.2) 35. [Release 3.3.3. 2020](https://github.com/espressif/esp-idf/releases/tag/v3.3.3) 36. [Release 3.3.4. 2020](https://github.com/espressif/esp-idf/releases/tag/v3.3.4) 37. [Release 3.3.5. 2021](https://github.com/espressif/esp-idf/releases/tag/v3.3.5) 38. [Release 3.3.6. 2022](https://github.com/espressif/esp-idf/releases/tag/v3.3.6) 39. [Release 4.0. 2020](https://github.com/espressif/esp-idf/releases/tag/v4.0) 40. [Release 4.0.1. 2020](https://github.com/espressif/esp-idf/releases/tag/v4.0.1) 41. [Release 4.0.2. 2020](https://github.com/espressif/esp-idf/releases/tag/v4.0.2) 42. [Release 4.0.3. 2021](https://github.com/espressif/esp-idf/releases/tag/v4.0.3) 43. [Release 4.0.4. 2021](https://github.com/espressif/esp-idf/releases/tag/v4.0.4) 44. [Release 4.1. 2020](https://github.com/espressif/esp-idf/releases/tag/v4.1) 45. [Release 4.1.1. 2021](https://github.com/espressif/esp-idf/releases/tag/v4.1.1) 46. [Release 4.1.2. 2021](https://github.com/espressif/esp-idf/releases/tag/v4.1.2) 47. [Release 4.1.3. 2022](https://github.com/espressif/esp-idf/releases/tag/v4.1.3) 48. [Release 4.1.4. 2022](https://github.com/espressif/esp-idf/releases/tag/v4.1.4) 49. [Release 4.2. 2020](https://github.com/espressif/esp-idf/releases/tag/v4.2) 50. [Release 4.2.1. 2021](https://github.com/espressif/esp-idf/releases/tag/v4.2.1)