esp-idf/examples/peripherals/uart/uart_echo/main/Kconfig.projbuild

menu "Echo Example Configuration"

    config EXAMPLE_UART_PORT_NUM
        int "UART port number"
        range 0 2 if IDF_TARGET_ESP32 || IDF_TARGET_ESP32S3
        default 2 if IDF_TARGET_ESP32 || IDF_TARGET_ESP32S3
        range 0 1 if IDF_TARGET_ESP32S2 || IDF_TARGET_ESP32C3
        default 1 if IDF_TARGET_ESP32S2 || IDF_TARGET_ESP32C3
        help
            UART communication port number for the example.
            See UART documentation for available port numbers.

    config EXAMPLE_UART_BAUD_RATE
        int "UART communication speed"
        range 1200 115200
        default 115200
        help
            UART communication speed for Modbus example.

    config EXAMPLE_UART_RXD
        int "UART RXD pin number"
        range 0 34 if IDF_TARGET_ESP32
        range 0 46 if IDF_TARGET_ESP32S2 || IDF_TARGET_ESP32S3
        range 0 19 if IDF_TARGET_ESP32C3
        range 0 47 if IDF_TARGET_ESP32S3
        default 5
        help
            GPIO number for UART RX pin. See UART documentation for more information
            about available pin numbers for UART.

    config EXAMPLE_UART_TXD
        int "UART TXD pin number"
        range 0 34 if IDF_TARGET_ESP32
        range 0 46 if IDF_TARGET_ESP32S2 || IDF_TARGET_ESP32S3
        range 0 19 if IDF_TARGET_ESP32C3
        range 0 47 if IDF_TARGET_ESP32S3
        default 4
        help
            GPIO number for UART TX pin. See UART documentation for more information
            about available pin numbers for UART.

    config EXAMPLE_TASK_STACK_SIZE
        int "UART echo example task stack size"
        range 1024 16384
        default 2048
        help
            Defines stack size for UART echo example. Insufficient stack size can cause crash.

endmenu