Scan barcode and go to next row

I have a barcode scanner. So when the barcode is scanned using a gun, the value normally is entered to textfield placed on the screen.

So I have made an excel macro. And when the barcode is scanned, the text appears on the cell ending with the new line character (text+"\r\n" is provided by the scanner itself). So an event is triggered and does the rest.

The problem is that the event is only triggered with a new line character. What if the barcode scanner didn't provide \r\n after every barcode output. How do I deal with such situations? How do I detect it and trigger event?

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