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Currently, several example dependencies rely on the fact that all registered components are added to the build, along with components specified in common requirements. This results in longer build times because even unused components must be built. Switch all examples to use idf_minimal_build to compile only the components actually required by the example. Signed-off-by: Frantisek Hrbata <frantisek.hrbata@espressif.com>
| Supported Targets | ESP32-C5 | ESP32-C6 | ESP32-H2 |
|---|
OpenThread Radio Co-Processor (RCP) Example
This example demonstrates an OpenThread Radio Co-Processor.
OpenThread RCP doesn't function alone, it needs to work together with a Host and this example covers two common user scenarios:
- Work with a Host Processor to perform a Thread Border Router.
- Work as a Thread Sniffer.
How to use example
Hardware Required
To run this example, a board with IEEE 802.15.4 module (for example ESP32-H2) is required.
Configure the project
The default communication interface is port 0 of ESP32-H2 UART running at 460800 baud, change the configuration in esp_ot_config.h if you want to use another interface or need different communication parameters.
RCP Size Optimization Configuration
To optimize the size of the RCP firmware, the following configurations are enabled by default:
CONFIG_COMPILER_OPTIMIZATION_SIZE=y
CONFIG_COMPILER_OPTIMIZATION_ASSERTIONS_SILENT=y
CONFIG_COMPILER_OPTIMIZATION_CHECKS_SILENT=y
CONFIG_COMPILER_SAVE_RESTORE_LIBCALLS=y
CONFIG_ESP_ERR_TO_NAME_LOOKUP=n
CONFIG_ESP_SYSTEM_PANIC_SILENT_REBOOT=y
CONFIG_LOG_DEFAULT_LEVEL_NONE=y
CONFIG_NEWLIB_NANO_FORMAT=y
CONFIG_OPENTHREAD_LOG_LEVEL_DYNAMIC=n
CONFIG_OPENTHREAD_LOG_LEVEL_NONE=y
Configure them via idf.py menuconfig if you need.
The firmware size are as follows (reference value):
Before Optimization After Optimization
esp_ot_rcp.bin for esp32h2 314KB 184KB
esp_ot_rcp.bin for esp32c6 299KB 208kb
Build and Flash
Build the project and flash it to the board:
idf.py -p <PORT> build flash
Now you'll get an OpenThread RCP, you can try the following use cases:
Thread Border Router
Please refer to ot_br example for the setup steps.
Thread Sniffer
Please refer to Thread Sniffer for the detailed instructions.