//init with I2C_BUS. RPi3 B+ => BUS_1;
        SCD30 scd30 = new SCD30(new I2CMode(I2CBus.BUS_1));

        scd30.setEventListener(event -> {
            switch (event.getType()) {

                case CO2:
                    System.out.println("CO2: " + event.getValue() + " ppm");
                    break;

                case TEMP:
                    System.out.println("Temperature: " + event.getValue() + " °C");
                    break;

                case HUMID:
                    System.out.println("Humidity: " + event.getValue() + " %");
                    break;
            }
        });

        System.out.println("SCD30 firmware version: "+scd30.getFirmwareVersion());

        scd30.start();