type: map
mapping:

    SERVER:
        required: true
        type: map
        mapping:
            API_POST_URL:
                required: true
                type: str

    LOGGER:
        required: true
        type: map
        mapping:

            SENSORS:
                required: true
                type: seq
                sequence:
                    - type: str
                      unique: true

            INTERVAL:
                # default: {days: 0, hours: 0, minutes: 0, seconds: 10}
                required: true
                type: map
                mapping:
                    days:
                        required: true
                        type: int
                        range:
                            min: 0
                    hours:
                        required: true
                        type: int
                        range:
                            min: 0
                    minutes:
                        required: true
                        type: int
                        range:
                            min: 0
                    seconds:
                        required: true
                        type: int
                        range:
                            min: 0
         
            USE_RTC_DATETIME: 
                required: true
                allowempty: true  
                type: map


            RTC_DATETIME_FORMAT: 
                # default: '%Y-%m-%d %H:%M%:%S'
                required: true
                type: str

    ARDUINO:
        required: true
        type: map
        mapping:
            SERIAL_PORT:
                required: true
                type: str

            BAUD_RATE:
                required: true
                type: int
                enum: [300, 1200, 2400, 4800, 9600, 14400, 19200, 28800, 38400, 57600, 115200]

            RESPONSE_DELAY:
                required: true
                type: int
                range:
                    min: 0

    DATALOG:
        required: true
        type: map
        mapping:
            FILENAME:
                required: true
                type: str

            CSV_SEP:
                required: true
                type: str

            DATETIME_FORMAT:
                required: true
                type: str

    SENSORS_AVAILABLE:
        required: true
        type: map
        allowempty: true