# esptool.py A Python-based, open-source, platform-independent utility to communicate with the ROM bootloader in Espressif chips. [](https://github.com/espressif/esptool/actions/workflows/test_esptool.yml) [](https://github.com/espressif/esptool/actions/workflows/build_esptool.yml) ## Documentation Visit the [documentation](https://docs.espressif.com/projects/esptool/) or run `esptool.py -h`. ## Contribute If you're interested in contributing to esptool.py, please check the [contributions guide](https://docs.espressif.com/projects/esptool/en/latest/contributing.html). ## About esptool.py was initially created by Fredrik Ahlberg (@[themadinventor](https://github.com/themadinventor/)), and later maintained by Angus Gratton (@[projectgus](https://github.com/projectgus/)). It is now supported by Espressif Systems. It has also received improvements from many members of the community. ## License This document and the attached source code are released as Free Software under GNU General Public License Version 2 or later. See the accompanying [LICENSE file](https://github.com/espressif/esptool/blob/master/LICENSE) for a copy.