Automatic Printing - Different printer for packingslip

functions.php

<?php
/**
 * @snippet       WooCommerce - Print to different printerID if we are printing a packingslip
 * @author        Redlight Media AB / Christopher Hedqvist
 * @compatible    WooCommerce 4.4.0
 */
function redlight_print_packingslip_to_custom_printer($printjob, $order) {
    if( strpos($printjob['title'], 'Packingslip') !== false) { 
     $printjob['printerId'] = 123456;
    }
    return $printjob;
}
add_filter('redlight_wc_automatic_printing_data', 'redlight_print_packingslip_to_custom_printer', 10, 2 );