//Discover active devices
[[sdk scannerManager] discoverDevices:WDASocketExtensionUUID //Get the active SocketScanner handheld barcode scanner
                                completion:^(NSArray <WDAcceptTerminal *>* _Nullable devices, NSError* _Nullable devicesError){
    //Register for updates on device statuses and action results
    //Add Scanner delegate to receive the data after the barcode was read
    //Implement the method: -(void)gistdevice:(WDAcceptTerminal*)device dataReceived:(NSData *)dataReceived;
    [[sdk scannerManager] addScannerDelegate:self
                                       forScanner:[devices firstObject]];//for simplicity we will use the first active SocketScanner device
}];

//Discover active devices
[[sdk scannerManager] discoverDevices:WDADatecsPrinterExtensionUUID //Get the active Datecs DPP-250 handheld printer
                           completion:^(NSArray <WDAcceptTerminal *>* _Nullable devices, NSError* _Nullable devicesError){
    //Register for updates on device statuses and action results
   //Add Printer delegate to receive notifications about the paper status
   //Implement the method: -(void)gistdevice:(WDAcceptTerminal*)device paperStatusUpdated:(AcceptPrinterPaperStatus)status
   [[sdk printerManager] addPrinterDelegate:self
                                 forPrinter:[devices firstObject]];//for simplicity we use the first active DPP-250
}];

//Discover active devices
[[sdk scannerManager] discoverDevices:WDADatecsPrinterExtensionUUID //Get the active Cash Drawer
                           completion:^(NSArray <WDAcceptTerminal *>* _Nullable devices, NSError* _Nullable devicesError){
   //Register for updates on device statuses and action results
   //Add Cash drawer delegate to receive the notifications about connection status and battery levels
   //Implement the methods: -(void)gistdevice:(WDAcceptTerminal*)device connectionStatusDidChange:(AcceptExtensionConnectionStatus)connectionsStatus
   //                      -(void)gistdevice:(WDAcceptTerminal*)device batteryLevelDidChange:(NSInteger)batteryLevel
   [[self.sdk cashDrawerManager] addManagerDelegate:self
                                          forDevice:cashDrawer];//for simplicity we use the first active Cash Drawer
 }];