my $form_data_file_csv = "/tmp/${hostname}_${macaddr}.csv";
# Text::CSV::Slurp wants arrayref of hashref
my $ARoHR = [ \%formdata ];
my $csv = Text::CSV::Slurp->create( input => $ARoHR);
open FH, ">$form_data_file_csv" or die "Could not open $form_data_file_csv. :$!\n";
print FH $csv;
close FH;