| Supported Targets | ESP32-C5 | ESP32-C6 | ESP32-H2 |
|---|
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.
To run this example, a board with IEEE 802.15.4 module (for example ESP32-H2) is required.
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.
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 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:
Please refer to ot_br example for the setup steps.
Please refer to Thread Sniffer for the detailed instructions.