menu "Example Configuration"

    choice EXAMPLE_SERIAL_CONFIG
        prompt "Type of serial connection to the modem"
        default EXAMPLE_SERIAL_CONFIG_UART
        config EXAMPLE_SERIAL_CONFIG_UART
            bool "UART"
            help
                Connect to modem via UART.
        config EXAMPLE_SERIAL_CONFIG_USB
            bool "USB"
            depends on IDF_TARGET_ESP32S2 || IDF_TARGET_ESP32S3
            help
                Connect to modem via USB (CDC-ACM class). For IDF version >= 4.4.
    endchoice
endmenu