Try this in your sub: 
sub get_sensor_id($) {
    my ($sensor) = @_;
    print "sensor input: $sensor\n";
    return 0;
}

[download]
There are some other things I would do differently (like: 
$value =~ s/^\s+|\s+$//g;

[download]
), but this should address your primary concern.

In reply to Re: Wrong content of variable passed to sub by state-o-dis-array
in thread Wrong content of variable passed to sub by olafmar

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