The Drupal Commerce Commerce POS module help us to achieve Point of Sale concept. The Drupal Commerce POS differs from normal commerce order. On Commerce POS they have implemented their own Order management rather than using Commerce Order. This has been achieved by its own interface and classes. On Completing each order, the order is again mapped to normal commerce order.
The below is the example code to get Commerce POS current order,
$state = POS_State::get(FALSE); $pos_order = $state->getOrder(); print_r($pos_order);