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+# Espressif IoT Development Framework
+
+* [中文版](./README_CN.md)
+
+ESP-IDF is the development framework for Espressif SoCs supported on Windows, Linux and macOS.
+
+# ESP-IDF Release Support Schedule
+
+![Support Schedule](https://dl.espressif.com/dl/esp-idf/support-periods.svg?v=1)
+
+- Please read [the support policy](SUPPORT_POLICY.md) and [the documentation](https://docs.espressif.com/projects/esp-idf/en/latest/esp32/versions.html) for more information about ESP-IDF versions.
+- Please see the [End-of-Life Advisories](https://www.espressif.com/en/support/documents/advisories?keys=&field_type_of_advisory_tid%5B%5D=817) for information about ESP-IDF releases with discontinued support.
+
+# ESP-IDF Release and SoC Compatibility
+
+![Chip support](https://dl.espressif.com/dl/esp-idf/chip-support.svg?v=1)
+
+See [Compatibility Between ESP-IDF Releases and Revisions of Espressif SoCs](https://github.com/espressif/esp-idf/blob/master/COMPATIBILITY.md) for the details of the compatibility between ESP-IDF and chip revisions.
+
+Espressif SoCs released before 2016 (ESP8266 and ESP8285) are supported by [RTOS SDK](https://github.com/espressif/ESP8266_RTOS_SDK) instead.
+
+# Developing With ESP-IDF
+
+## Setting Up ESP-IDF
+
+See https://idf.espressif.com/ for links to detailed instructions on how to set up the ESP-IDF depending on chip you use.
+
+**Note:** Each SoC series and each ESP-IDF release has its own documentation. Please see Section [Versions](https://docs.espressif.com/projects/esp-idf/en/latest/esp32/versions.html) on how to find documentation and how to checkout specific release of ESP-IDF.
+
+### Non-GitHub forks
+
+ESP-IDF uses relative locations as its submodules URLs ([.gitmodules](.gitmodules)). So they link to GitHub. If ESP-IDF is forked to a Git repository which is not on GitHub, you will need to run the script [tools/set-submodules-to-github.sh](tools/set-submodules-to-github.sh) after git clone.
+
+The script sets absolute URLs for all submodules, allowing `git submodule update --init --recursive` to complete. If cloning ESP-IDF from GitHub, this step is not needed.
+
+## Finding a Project
+
+As well as the [esp-idf-template](https://github.com/espressif/esp-idf-template) project mentioned in Getting Started, ESP-IDF comes with some example projects in the [examples](examples) directory.
+
+Once you've found the project you want to work with, change to its directory and you can configure and build it.
+
+To start your own project based on an example, copy the example project directory outside of the ESP-IDF directory.
+
+# Quick Reference
+
+See the Getting Started guide links above for a detailed setup guide. This is a quick reference for common commands when working with ESP-IDF projects:
+
+## Setup Build Environment
+
+(See the Getting Started guide listed above for a full list of required steps with more details.)
+
+* Install host build dependencies mentioned in the Getting Started guide.
+* Run the install script to set up the build environment. The options include `install.bat` or `install.ps1` for Windows, and `install.sh` or `install.fish` for Unix shells.
+* Run the export script on Windows (`export.bat`) or source it on Unix (`source export.sh`) in every shell environment before using ESP-IDF.
+
+## Configuring the Project
+
+* `idf.py set-target <chip_name>` sets the target of the project to `<chip_name>`. Run `idf.py set-target` without any arguments to see a list of supported targets.
+* `idf.py menuconfig` opens a text-based configuration menu where you can configure the project.
+
+## Compiling the Project
+
+`idf.py build`
+
+... will compile app, bootloader and generate a partition table based on the config.
+
+## Flashing the Project
+
+When the build finishes, it will print a command line to use `esptool` to flash the chip. However you can also do this automatically by running:
+
+`idf.py -p PORT flash`
+
+Replace PORT with the name of your serial port (like `COM3` on Windows, `/dev/ttyUSB0` on Linux, or `/dev/cu.usbserial-X` on MacOS. If the `-p` option is left out, `idf.py flash` will try to flash the first available serial port.
+
+This will flash the entire project (app, bootloader and partition table) to a new chip. The settings for serial port flashing can be configured with `idf.py menuconfig`.
+
+You don't need to run `idf.py build` before running `idf.py flash`, `idf.py flash` will automatically rebuild anything which needs it.
+
+## Viewing Serial Output
+
+The `idf.py monitor` target uses the [esp-idf-monitor tool](https://github.com/espressif/esp-idf-monitor) to display serial output from Espressif SoCs. esp-idf-monitor also has a range of features to decode crash output and interact with the device. [Check the documentation page for details](https://docs.espressif.com/projects/esp-idf/en/latest/get-started/idf-monitor.html).
+
+Exit the monitor by typing Ctrl-].
+
+To build, flash and monitor output in one pass, you can run:
+
+`idf.py flash monitor`
+
+## Compiling & Flashing Only the App
+
+After the initial flash, you may just want to build and flash just your app, not the bootloader and partition table:
+
+* `idf.py app` - build just the app.
+* `idf.py app-flash` - flash just the app.
+
+`idf.py app-flash` will automatically rebuild the app if any source files have changed.
+
+(In normal development there's no downside to reflashing the bootloader and partition table each time, if they haven't changed.)
+
+## Erasing Flash
+
+The `idf.py flash` target does not erase the entire flash contents. However it is sometimes useful to set the device back to a totally erased state, particularly when making partition table changes or OTA app updates. To erase the entire flash, run `idf.py erase-flash`.
+
+This can be combined with other targets, ie `idf.py -p PORT erase-flash flash` will erase everything and then re-flash the new app, bootloader and partition table.
+
+# Resources
+
+* Documentation for the latest version: https://docs.espressif.com/projects/esp-idf/. This documentation is built from the [docs directory](docs) of this repository.
+
+* [Beginner's Guide to Key Concepts and Resources of ESP-IDF](https://youtu.be/J8zc8mMNKtc?feature=shared)
+
+* The [esp32.com forum](https://esp32.com/) is a place to ask questions and find community resources.
+
+* [Check the Issues section on github](https://github.com/espressif/esp-idf/issues) if you find a bug or have a feature request. Please check existing Issues before opening a new one.
+
+* If you're interested in contributing to ESP-IDF, please check the [Contributions Guide](https://docs.espressif.com/projects/esp-idf/en/latest/contribute/index.html).