# ESP-NOW Component [![Component Registry](https://components.espressif.com/components/espressif/esp-now/badge.svg)](https://components.espressif.com/components/espressif/esp-now) - [User Guide](https://github.com/espressif/esp-now/tree/master/User_Guide.md) esp-now supports one-to-many and many-to-many device connection and control which can be used for the mass data transmission, like network config, firmware upgrade and debugging etc. ### Add component to your project Please use the component manager command `add-dependency` to add the `esp-now` to your project's dependency, during the `CMake` step the component will be downloaded automatically. ``` idf.py add-dependency "espressif/esp-now=*" ``` ## Example Please use the component manager command `create-project-from-example` to create the project from example template. ``` idf.py create-project-from-example "espressif/esp-now=*:coin_cell_demo" ``` Then the example will be downloaded in current folder, you can check into it for build and flash. > You can use this command to download other examples. Or you can download examples from esp-now repository: 1. [coin_cell_demo](https://github.com/espressif/esp-now/tree/master/examples/coin_cell_demo) 2. [control](https://github.com/espressif/esp-now/tree/master/examples/control) 3. [get-started](https://github.com/espressif/esp-now/tree/master/examples/get-started) 4. [ota](https://github.com/espressif/esp-now/tree/master/examples/ota) 5. [security](https://github.com/espressif/esp-now/tree/master/examples/security) 6. [solution](https://github.com/espressif/esp-now/tree/master/examples/solution) 7. [wireless_debug](https://github.com/espressif/esp-now/tree/master/examples/wireless_debug) ### Q&A Q1. I encountered the following problems when using the package manager ``` HINT: Please check manifest file of the following component(s): main ERROR: Because project depends on esp-now (2.*) which doesn't match any versions, version solving failed. ``` A1. For the examples downloaded by using this command, you need to comment out the override_path line in the main/idf_component.yml of each example. Q2. I encountered the following problems when using the package manager ``` Executing action: create-project-from-example CMakeLists.txt not found in project directory /home/username ``` A2. This is because an older version packege manager was used, please run `pip install -U idf-component-manager` in ESP-IDF environment to update.
idf.py add-dependency "espressif/esp-now^2.1.1"