# espressif/esptool

Serial utility for flashing, provisioning, and interacting with Espressif SoCs

Repository: https://github.com/espressif/esptool
Canonical: https://ross.abutalabs.com/products/esptool
Homepage: https://docs.espressif.com/projects/esptool
Language: Python
License: GPL-2.0
License Family: copyleft
Last push: 2026-08-26T12:10:47+00:00

## Health v2 (maintenance only)
Score: 97/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 93, longevity 100
- inputs: {"age_days": 4379, "days_push": 7, "days_rel": 50, "gap_med": 15, "n_releases_24m": 14}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 6457, forks 1496 (observed 2026-08-28T04:09:43.586400+00:00)

## What it is
esptool is a Python-based, platform-independent serial utility for flashing firmware, provisioning, and interacting with Espressif SoCs such as the ESP32. It communicates with the chip's ROM bootloader (or an uploaded flasher stub) and can also be used as a Python library.

## Use cases
- flash firmware onto an esp32 over serial
- erase the flash memory of an espressif chip
- read the mac address and flash chip id of an esp32
- read and write esp32 efuses
- build and merge binary images for espressif flashing
- provision espressif chips securely with espefuse and espsecure

## When to choose
- you are developing or deploying firmware for ESP32, ESP8266, or other Espressif SoCs
- you need a scriptable, cross-platform flashing tool that also works as a Python library
- you need low-level access to eFuses, flash contents, or chip info

## When to avoid
- you are flashing microcontrollers from other vendors such as STM32, AVR, or RP2040
- you need a graphical flashing interface rather than a command-line tool
- you are not working with Espressif hardware

## Facets
- artifact type: cli-tool
- maturity: stable
- function: developer-tools, cli, embedded, sdk
- domain: embedded-systems, developer-tools, hardware
- platform: python, cli, cross-platform, windows
- tags: espressif, esp32, firmware-flashing, serial-communication, bootloader, efuse, iot, command-line, linux, macos

## Member repositories
- espressif/esptool (main) score 97

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:09:43.586400+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:44:38.217334+00:00, confidence not recorded.
  - readme: https://github.com/espressif/esptool (fetched 2026-08-28T04:09:43.586400+00:00, sha fcff74336b14)
  - homepage: https://docs.espressif.com/projects/esptool (fetched 2026-08-29T08:41:18.778230+00:00, sha e02511fc3a78)
  - site_page: https://docs.espressif.com/projects/esptool/en/latest/esp32/installation.html (fetched 2026-08-29T08:41:18.787608+00:00, sha eff2f4c2e35c)
  - site_page: https://docs.espressif.com/projects/esptool/en/latest/esp32/about.html (fetched 2026-08-29T08:41:18.790077+00:00, sha 150c7ab153b8)
  - site_page: https://docs.espressif.com/projects/esptool/en/release-v4/esp32 (fetched 2026-08-29T08:41:18.791952+00:00, sha 4b180e2a4ff7)
  - registry_pypi: https://pypi.org/pypi/esptool/json (fetched 2026-08-29T08:41:18.793907+00:00, sha 012dff655139)
- Data as of 2026-08-30T08:39:29.467469+00:00.