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Radim Karniš 39fd73f28c Some checks are pending Build esptool / Build esptool binaries for linux-aarch64 (push) Waiting to run Details Build esptool / Build esptool binaries for linux-amd64 (push) Waiting to run Details Build esptool / Build esptool binaries for linux-armv7 (push) Waiting to run Details Build esptool / Build esptool binaries for macos-amd64 (push) Waiting to run Details Build esptool / Build esptool binaries for macos-arm64 (push) Waiting to run Details Build esptool / Build esptool binaries for windows-amd64 (push) Waiting to run Details Build esptool / Create GitHub release (push) Blocked by required conditions Details Test esptool / test_esptool (3.10) (push) Waiting to run Details Test esptool / test_esptool (3.11) (push) Waiting to run Details Test esptool / test_esptool (3.12) (push) Waiting to run Details Test esptool / test_esptool (3.13) (push) Waiting to run Details Test esptool / test_esptool (3.14) (push) Waiting to run Details Test esptool / check_stubs (push) Waiting to run Details Merge branch 'fix/vid-pid-symlink-lookup' into 'master' fix: Preserve VID/PID lookup for symlinked ports See merge request espressif/esptool!970		2026-06-25 16:24:03 +02:00
.github	ci: GitLab pipeline readability refactor	2026-06-17 15:40:24 +02:00
.gitlab	ci: GitLab pipeline readability refactor	2026-06-17 15:40:24 +02:00
ci	ci: GitLab pipeline readability refactor	2026-06-17 15:40:24 +02:00
docs	fix(espefuse): Remove non-existent HMAC key purposes for ESP32-C61	2026-06-09 18:06:07 +05:30
esp_rfc2217_server	ci: Updated pre-commit hooks, Added checks, Fixed files	2026-06-09 10:07:27 +02:00
espefuse	fix(espefuse): Remove non-existent HMAC key purposes for ESP32-C61	2026-06-09 18:06:07 +05:30
espsecure	ci: Updated pre-commit hooks, Added checks, Fixed files	2026-06-09 10:07:27 +02:00
esptool	fix: Preserve VID/PID lookup for symlinked ports	2026-06-25 13:37:15 +02:00
test	Merge branch 'refactor/GL_pipeline' into 'master'	2026-06-18 12:18:34 +02:00
.git-blame-ignore-revs	ci: Added commit sha to .git-blame-ignore-revs	2026-06-09 10:10:59 +02:00
.gitignore	docs: Add initial structure for new docs	2021-11-05 13:12:49 +01:00
.gitlab-ci.yml	ci: GitLab pipeline readability refactor	2026-06-17 15:40:24 +02:00
.pre-commit-config.yaml	ci: Updated pre-commit hooks, Added checks, Fixed files	2026-06-09 10:07:27 +02:00
CHANGELOG.md	change: Update version to 5.3.0	2026-06-01 12:36:18 +02:00
CONTRIBUTING.rst	docs(stub_flasher): Document esp-flasher-stub and announce legacy stub deprecation	2026-06-05 22:48:45 +02:00
esp_rfc2217_server.py	ci: Updated pre-commit hooks, Added checks, Fixed files	2026-06-09 10:07:27 +02:00
espefuse.py	bugfix: Adjust wrapper scripts to not import themselves	2023-05-22 14:37:02 +00:00
espsecure.py	bugfix: Adjust wrapper scripts to not import themselves	2023-05-22 14:37:02 +00:00
esptool.py	bugfix: Adjust wrapper scripts to not import themselves	2023-05-22 14:37:02 +00:00
LICENSE	added complete GPL license, minor update in readme	2014-09-15 21:11:03 +02:00
MANIFEST.in	docs: Remove .py suffix from tool names	2025-06-24 14:22:28 +02:00
pyproject.toml	ci: GitLab pipeline readability refactor	2026-06-17 15:40:24 +02:00
README.md	docs(stub_flasher): Document esp-flasher-stub and announce legacy stub deprecation	2026-06-05 22:48:45 +02:00
setup.py	change: Update imports according to Ruff isort rules	2026-04-21 10:18:32 +02:00

README.md

esptool

A Python-based, open-source, platform-independent serial utility for flashing, provisioning, and interacting with Espressif SoCs.

Documentation

Visit the documentation or run esptool -h.

Flasher Stub

esptool uploads a small flasher stub program to the chip to improve flashing performance and work around ROM bootloader limitations. The stub is developed in the esp-flasher-stub repository. Prebuilt binaries are bundled with esptool releases.

Contribute

If you're interested in contributing to esptool, please check the contributions guide.

About

esptool was initially created by Fredrik Ahlberg (@themadinventor), and later maintained by Angus Gratton (@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 for a copy.