This demo project shows how to build an ESP IDF project that can be used to port existing ESP32-S3 software to the flow3r. This is useful if you have an application that does not fit in the default flow3r application framework, which is based on MicroPython.

Binaries created with this template can be run by selecting them in flow3r's recovery mode. They will replace the default flow3r application in that case.

This demo starts a FreeRTOS task and turns on all LEDs to "Go Green".

• Install ESP IDF 5.1 (ideally with FPU patch backported, see flow3r docs)
• Run git submodule update
• Run idf.py build to build
• Run idf.py app-flash to flash the app without touching flow3r bootloader and recovery
• Copy build/Go_Green.bin to flow3r's internal flash or SD card to flash via recovery mode

The project go_green contains one source file in C language go_green_main.c. The file is located in folder main.

ESP-IDF projects are built using CMake. The project build configuration is contained in CMakeLists.txt files that provide set of directives and instructions describing the project's source files and targets (executable, library, or both).

Below is short explanation of remaining files in the project folder.

├── CMakeLists.txt
├── main
│   ├── CMakeLists.txt
│   └── go_green_main.c
└── README.md                  This is the file you are currently reading

For more information on structure and contents of ESP-IDF projects, please refer to Section Build System of the ESP-IDF Programming Guide.

• Program upload failure

  • Hardware connection is not correct: run idf.py -p PORT monitor, and reboot your board to see if there are any output logs.

Please use the following feedback channels:

• For technical queries, go to the esp32.com forum
• For a feature request or bug report, create a GitHub issue

We will get back to you as soon as possible.