Appendix B Code Examples

Open Device

self.mtSCRALib = [[MTSCRA alloc] init]; 
[self.mtSCRALib 
listenForEvents:(TRANS_EVENT_OK|TRANS_EVENT_START|TRANS_EVENT_ERROR)]; 

//iDynamo 
[self.mtSCRALib setDeviceType:(MAGTEKIDYNAMO)]; 
[self.mtSCRALib setDeviceProtocolString:(“com.magtek.idynamo”)]; 

//Audio //
[self.mtSCRALib setDeviceType:(MAGTEKAUDIOREADER)]; 
[self.mtSCRALib openDevice];

Close Device

self.mtSCRALib closeDevice];

Get Track Data from Reader

[[NSNotificationCenter defaultCenter] addObserver:self 
selector:@selector(trackDataReady:) name:@"trackDataReadyNotification" 
object:nil]; 

-  (void)trackDataReady:(NSNotification *)notification 
{ 
        NSNumber *status = [[notification userInfo] 
valueForKey:@"status"]; 
        [self performSelectorOnMainThread:@selector(onDataEvent:) 
withObject:status waitUntilDone:YES]; 
} 
-  (void)onDataEvent:(id)status 
{ 
        //[self clearLabels]; 
        switch ([status intValue]) { 
        
                case TRANS_STATUS_OK: 
                        NSLog(@"TRANS_STATUS_OK"); 
                        break; 
                        
                case TRANS_STATUS_ERROR: 
                        NSLog(@"TRANS_STATUS_ERROR"); 
                        break; 
                        
                default: 
                        break; 
        } 
}

Get Connection Status of Reader

    [[NSNotificationCenter defaultCenter] addObserver:self 
selector:@selector(devConnStatusChange) 
name:@"devConnectionNotification" object:nil]; 

- (void)devConnStatusChange 
{ 
        BOOL isDeviceConnected = [self.mtSCRALib isDeviceConnected]; 
        if (isDeviceConnected) 
        { 
                self.deviceStatus.text = @"Device Connected"; 
        } 
        else 
        }      
                self.deviceStatus.text = @"Device Disconnected"; 
        } 
}

Diagrams

MSR Card Swipe

Note: This is broad to cover multiple devices. For devices that do not need or support a specific command, (i.e. SetMSRAlwaysOn), that portion may be omitted in the flow.

EMV Transaction (Quick Chip)

Note: This is broad to cover multiple devices. For devices that do not need or support a specific command, (i.e. SetMSRAlwaysOn), that portion may be omitted in the flow.

EMV Transaction (Full)

Note: This is broad to cover multiple devices. For devices that do not need or support a specific command, (i.e. SetMSRAlwaysOn), that portion may be omitted in the flow.