if (isset($omsg['uContactor']) && is_array($omsg['uContactor'])) {
                                    $mask = '';
                                    foreach ($omsg['uContactor'] as $value) {
                                        $mask .= ($value !== null) ? '1' : '0';
                                    }
                                    $sql_update = "UPDATE Devices SET Mask_Command = :device_mask WHERE id = :device_id";
                                    try {
                                        $stmt_update = $db->db->prepare($sql_update);
                                        $stmt_update->execute([
                                            ':device_mask' => $mask,
                                            ':device_id'   => $ival['Devices_id']
                                        ]);
                                    } catch (Exception $e) {
                                        error_log('Device update error: ' . $e->getMessage());
                                    }
                                }