esp-at project was started and powered by Espressif Systems (@espressif) as an official project, for the ESP8266, ESP32, ESP32-C3, and ESP32-S2 Series SoCs provided for Windows, Linux, and macOS.
It is now supported and maintained by Espressif esp-at team (@esp-at).
esp-at is Free Software under a MIT license.
Espressif Wi-Fi and Bluetooth® chipsets are often used as add-on modules to seamlessly integrate wireless connectivity features into new and existing products.
In an effort to facilitate this and cut down on engineering costs, Espressif Systems has developed a set of AT commands that can be used to interface with Espressif products.
"AT" means 'attention'. Each command string is prefixed with "AT", and a number of discrete commands can be concatenated after the "AT".
The AT command firmware allows for rapid integration by providing:
- In-built TCP/IP stack and data buffering
- Easy integration with resource-constrained host platforms
- Easy-to-parse command-response protocols
- Customized, user-defined AT commands
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There are several guides for esp-at developers and users. These guides can be rendered in a number of formats, like HTML and PDF.
Documentation for the latest version: https://docs.espressif.com/projects/esp-at/en/latest/index.html. This documentation is built from the docs directory of this repository. -
Check the Issues section on GitHub if you find a bug or have a feature request. Please check existing Issues before opening a new one.
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The esp-at forum is a place to ask questions and find community resources.
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The next version of ESP-AT firmware (v2.4.0.0) is planned to be released in March 2022. At present, only ESP32-C3 series firmware is planned to be released, and ESP32-C3 firmware would support Bluetooth LE 5.0.
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ESP-AT Support Policy for ESP Chip Series
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ESP32-C3 Series
- Preferred recommended chip by ESP-AT
- Released version is recommended: v2.3.0.0_esp32c3
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ESP32 Series
- Released version is recommended: v2.2.0.0_esp32
- The next version of ESP-AT firmware (v2.3.0.0) for ESP32 is in preparatory stage, but no an estimated time of release.
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ESP8266 Series
- ESP32-C3 is recommended instead
- ESP-AT will not release the major version for ESP8266.
- ESP-AT no longer adds new features to ESP8266.
- v2.2.1.0_esp8266 is the last version of ESP-AT for ESP8266, corresponding to branch release/v2.2.0.0_esp8266, corresponding to documentation https://docs.espressif.com/projects/esp-at/en/release-v2.2.0.0_esp8266.
- ESP-AT will regularly update release/v2.2.0.0_esp8266 branch for ESP8266. Update includes vital bugfix and security repair.
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ESP32-S2 Series
- ESP32-C3 is recommended instead
- ESP-AT will not release the major version for ESP32-S2.
- ESP-AT no longer adds new features to ESP32-S2.
- v2.1.0.0_esp32s2 is the last version of ESP-AT for ESP32-S2, corresponding to branch release/v2.1.0.0_esp32s2, corresponding to documentation https://docs.espressif.com/projects/esp-at/en/release-v2.1.0.0_esp32s2.
- ESP-AT will regularly update release/v2.2.0.0_esp32 branch for ESP32-S2. Update includes vital bugfix and security repair.
esp-at 作为由 Espressif Systems (@espressif) 发起和提供技术支持的官方项目，适用于 Windows、Linux、macOS 上的 ESP8266、ESP32、ESP32-C3、和 ESP32-S2 系列芯片。
当前该项目由 Espressif esp-at 团队 (@esp-at) 负责技术支持和维护。
esp-at 是 MIT 许可证下的免费软件。
乐鑫 Wi-Fi 和蓝牙芯片可以用作附加模块，完美集成在其他现有产品上，提供无线通讯功能。 为降低客户开发成本，乐鑫开发了一套 AT 指令集，方便客户简单快速地使用 AT 指令来控制芯片。
乐鑫提供的 AT 指令固件具有以下特色，利于芯片集成到应用中：
- 内置 TCP/IP 堆栈和数据缓冲
- 能便捷地集成到资源受限的主机平台中
- 主机对指令的回应易于解析
- 用户可自定义 AT 指令
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这里为开发者和用户提供了一些指南，这些指南可以以多种格式呈现，比如 HTML 和 PDF。
最新文档见：https://docs.espressif.com/projects/esp-at/zh_CN/latest/index.html。该文档是由本仓库 docs 目录 自动编译构建的。 -
如果你有 bug 上报或者功能需求，可以在 GitHub Issues 里提交。请在提交前检索下是否有相同的 Issue。
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esp-at 社区 可以用来询问问题或寻找一些社区资源。
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下一版本 ESP-AT 固件 (v2.4.0.0)，计划在 2022 年 3 月发布。当前仅计划发布 ESP32-C3 系列固件，ESP32-C3 固件将支持低功耗蓝牙 5.0。
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ESP-AT 对不同芯片系列支持策略
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ESP32-C3 系列
- ESP-AT 首选推荐芯片
- 推荐使用发布版本：v2.3.0.0_esp32c3
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ESP32 系列
- 推荐使用发布版本：v2.2.0.0_esp32
- ESP32 下一版本 ESP-AT 固件 (v2.3.0.0) 在开发准备阶段，但暂无预计的发布时间
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ESP8266 系列
- 推荐使用 ESP32-C3 芯片
- ESP-AT 不再为 ESP8266 添加新功能
- ESP-AT 不再为 ESP8266 发布大版本
- v2.2.1.0_esp8266 是 ESP-AT 为 ESP8266 发布的最后一个版本，对应分支为 release/v2.2.0.0_esp8266，对应文档为 https://docs.espressif.com/projects/esp-at/zh_CN/release-v2.2.0.0_esp8266
- ESP-AT 将定期在 release/v2.2.0.0_esp8266 分支为 ESP8266 进行重要 bug 修复，安全修补等更新
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ESP32-S2 系列
- 推荐使用 ESP32-C3 芯片
- ESP-AT 不再为 ESP32-S2 添加新功能
- ESP-AT 不再为 ESP32-S2 发布大版本
- v2.1.0.0_esp32s2 是 ESP-AT 为 ESP32-S2 发布的最后一个版本，对应分支为 release/v2.1.0.0_esp32s2，对应文档为 https://docs.espressif.com/projects/esp-at/zh_CN/release-v2.1.0.0_esp32s2
- ESP-AT 将定期在 release/v2.2.0.0_esp32 分支为 ESP32-S2 进行重要 bug 修复，安全修补等更新