The user will be able to specify multiple RBL numbers as parameters when starting the script so that he can switch between those stations by pressing a button during execution.
Push a button the keypad to switch the driving direction.
Example: Display shows the arrival time of the tram line 9 driving to Westbahnhof. After you've pushed the button, the display is going to show the arrival time of tram line 9 driving to Gersthof instead.
This prevents the script from unnecessarily turning on the display even though only the help message was requested by the user by entering the -h/--help argument.
If the indicator for an interruption of operations (#11) is being displayed, press and hold the select button to display the reason behind of this. The message will disappear after a few seconds.
If a station's name contains more characters than the lcd screen can display at once, scroll the text to left instead of simply cutting it of.
If the end of the text has been reached, jump back to the beginning.