if([PsSDK initializeSdk:IDYNAMO environment:@"SBX" error:&error])
{
        self.sharedPsSDK = [PsSDK sharedInstance];
        self.sharedPsSDK.delegate = self;
}
else 
{
  // Handle error here
}

-(void) resetSDK
{
    void (^completionCallback)(BOOL, NSError *) = ^(BOOL didDisconnect, NSError *myError)
    {
        if (didDisconnect) {
            // Do disconnect dialogues here.
               [PsSDK resetSdk];
        } else {
             // Handle disconnect failure
        }
    };
    
    if (_sharedPsSDK != nil) {
        [_sharedPsSDK disconnectDeviceWithHandler:completionCallback];
    }
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    self.sharedPsSDK = [PsSDK sharedInstance];
}

if ([PsSDK isInitialized])
{
     // Do logic based code here
}

void (^btScanCallback)(NSArray<PsBluetoothDevice *> *, NSError *error) = ^(NSArray<PsBluetoothDevice *> *deviceArray, NSError *myerror)
{
      if (deviceArray.count > 0) {
                // Handle connection logic here. Choose a serial number to connect to.
      });
      } else {
               // Handle error or no devices found here
      }
};

// Do client token request prior to calling this method. Suggest placing this method inside client token callback or delegate.
[_sharedPsSDK connectDeviceWithClientToken:myClientToken
     completionHandler:completionCallback];

void (^completionCallback)(BOOL, PsDeviceInfo *, NSError *) = ^(BOOL isConnected, PsDeviceInfo *deviceInfo, NSError *connectionError)
{
      if (!isConnected) {
                // Handle error here
      });
      } else {
               // Do successful connection logic based code here
      }
};

// Do client token request prior to calling this method. Suggest placing this method inside client token callback or delegate.
[_sharedPsSDK connectDeviceWithClientToken:myClientToken
     completionHandler:completionCallback];

void (^completionCallback)(BOOL, PsDeviceInfo *, NSError *) = ^(BOOL isConnected, PsDeviceInfo *deviceInfo, NSError *connectionError)
{
      if (!isConnected) {
                // Handle error here
      });
      } else {
               // Do successful connection logic based code here
      }
};

[_sharedPsSDK connectDeviceWithHandler:completionCallback];

void (^completionCallback)(BOOL, NSError *) = ^(BOOL didDisconnect, NSError *disconnectError)
{
      if (!didDisconnect) {
            // Handle error here
      } else {
           // Do disconnect logic based code here
      }
};

[_sharedPsSDK disconnectDeviceWithHandler:completionCallback];

if ([_sharedPsSDK isDeviceConnected])
{
     // Do logic based code here
}

NSString *displayName = [self.sharedPsSDK getDeviceName];

NSString *displayName = [self.sharedPsSDK getDeviceName];

NSDecimalNumber *amount = [NSDecimalNumber decimalNumberWithString:self.amountField.text];

PsSaleRequest *saleRequest = [[PsSaleRequest alloc]initWithamount:amount
duplicateCheck:@"enabled"
currency:@"usd"
externalId:@"myUniqueId"
cardSaleDescription:@"saleDescription"
capture:@"completed_sale"
allowPartialApprovals:YES;

void (^completionCallback)(PsSaleResponse *response, NSError *) = ^(PsSaleResponse *response, NSError *saleError)
{
      if (saleError == nil) {
                // Handle success here
      });
      } else {
               // Handle error here
      }
};

// Do [Client token](https://documentation.paysimple.com/v2019/docs/authorization#section-client-token-authorization) request prior to calling this method. Suggest placing this method inside client token callback or delegate.
[sharedPsSDK makeSaleWithClientToken:clientToken
                                          request:saleRequest
                                completionHandler:completionCallback];

[self.sharedPsSDK stopCurrentBbposFlow];

-(void) deviceConnectionDidChange:(NSString *)deviceType
                      isConnected:(BOOL)isConnected
{
    NSLog(@"DeviceConnectionDidChange Delegate Triggered");
    
    if (!isConnected)
    {
        dispatch_async(dispatch_get_main_queue(), ^{
            
            UIAlertController* alertController = [UIAlertController
                                                  alertControllerWithTitle:@"Device is not connected"
                                                  message:@"You must connect device to make sale"
                                                  preferredStyle:UIAlertControllerStyleAlert];
            
            UIAlertAction* alertAction = [UIAlertAction
                                          actionWithTitle:@"OK"
                                          style:UIAlertActionStyleDefault
                                          handler:^(UIAlertAction* action){}];
            
            [alertController addAction:alertAction];
            
            [self presentViewController:alertController animated:YES completion:nil];
        });
    }
}

-(void) onBbposDisplayText:(NSString *)text
{         
           UIAlertController *alertController = [UIAlertController alertControllerWithTitle: text message: @"" preferredStyle: UIAlertControllerStyleAlert];
          UIAlertAction *alertAction = [UIAlertAction actionWithTitle: @"Cancel"
                                     style: UIAlertActionStyleDefault
                                    handler: ^(UIAlertAction * action)
                         {
                           [sharedPsSDK stopCurrentBbposFlow];
                         }
                         ];
          
          [alertController addAction: alertAction];
          
          [weakSelf presentViewController: alertController animated: NO completion: nil];    
}

-(void) onBbposRemoveCard
{         
           UIAlertController *alertController = [UIAlertController alertControllerWithTitle: "Remove Card" message: @"" preferredStyle: UIAlertControllerStyleAlert];
          UIAlertAction *alertAction = [UIAlertAction actionWithTitle: @"Cancel"
                                     style: UIAlertActionStyleDefault
                                    handler: ^(UIAlertAction * action)
                         {
                           [sharedPsSDK stopCurrentBbposFlow];
                         }
                         ];
          
          [alertController addAction: alertAction];
          
          [weakSelf presentViewController: alertController animated: NO completion: nil];    
}

-(void) onBbposDeviceInitializationProgress:(double)currentProgress
description:(NSString *)description
model:(NSString *)model
serialNumber:(NSString *)serialNumber
{         
NSNumber *progress = [NSNumber numberWithDouble:currentProgress];

// Check for presented alert view controller. If exists, just update

           UIAlertController *alertController = [UIAlertController alertControllerWithTitle: "Pairing Progress" message: [progress stringValue] preferredStyle: UIAlertControllerStyleAlert];
          UIAlertAction *alertAction = [UIAlertAction actionWithTitle: @"Cancel"
                                     style: UIAlertActionStyleDefault
                                    handler: ^(UIAlertAction * action)
                         {
                           [sharedPsSDK stopCurrentBbposFlow];
                         }
                         ];
          
          [alertController addAction: alertAction];
          
          [weakSelf presentViewController: alertController animated: NO completion: nil];    
}

-(void) onBbposBatteryLow
{         
           UIAlertController *alertController = [UIAlertController alertControllerWithTitle: "Low Battery Warning" message: @"" preferredStyle: UIAlertControllerStyleAlert];
          UIAlertAction *alertAction = [UIAlertAction actionWithTitle: @"Cancel"
                                     style: UIAlertActionStyleDefault
                                    handler: ^(UIAlertAction * action)
                         {
                           [sharedPsSDK stopCurrentBbposFlow];
                         }
                         ];
          
          [alertController addAction: alertAction];
          
          [weakSelf presentViewController: alertController animated: NO completion: nil];    
}

-(void) onBbposDidDisconnect
{         
           UIAlertController *alertController = [UIAlertController alertControllerWithTitle: "Device did disconnect" message: @"" preferredStyle: UIAlertControllerStyleAlert];
          UIAlertAction *alertAction = [UIAlertAction actionWithTitle: @"Ok"
                                     style: UIAlertActionStyleDefault
                                    handler: ^(UIAlertAction * action)
                         {
                           [sharedPsSDK stopCurrentBbposFlow];
                         }
                         ];
          
          [alertController addAction: alertAction];
          
          [weakSelf presentViewController: alertController animated: NO completion: nil];    
}

-(void) onBbposDidError
{         
           UIAlertController *alertController = [UIAlertController alertControllerWithTitle: "BBPOS Device Error" message: error.description preferredStyle: UIAlertControllerStyleAlert];
          UIAlertAction *alertAction = [UIAlertAction actionWithTitle: @"Ok"
                                     style: UIAlertActionStyleDefault
                                    handler: ^(UIAlertAction * action)
                         {
                           [sharedPsSDK stopCurrentBbposFlow];
                         }
                         ];
          
          [alertController addAction: alertAction];
          
          [weakSelf presentViewController: alertController animated: NO completion: nil];    
}