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DUREX Vendor Control/CommunicationProtocol.m 15.1 KB
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//
//  CommunicationProtocol.m
//  DUREX Vendor Control
//
//  Created by Imanol Barba on 5/23/14.
//  Copyright (c) 2014 Emmoco. All rights reserved.
//

#import "CommunicationProtocol.h"

@interface CommunicationProtocol ()
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@property Boolean messageAvailableMobile;
@property Boolean messageAvailableDevice;
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@end

@implementation CommunicationProtocol
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+ (id)sharedProtocol
{
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    static CommunicationProtocol *shared = nil;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        shared = [[self alloc] init];
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        [shared setMessageAvailableDevice:FALSE];
        [shared setMessageAvailableMobile:FALSE];
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    });
    return shared;
}
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-(void) readMessageAvailableMobile
{
    [[EMConnectionManager sharedManager] readResource:@"messageAvailableMobile" onSuccess:^(id readValue)
     {
         [self setMessageAvailableMobile:[readValue intValue]];
         if([self messageAvailableMobile])
         {
             NSLog(@"[CommunicationProtocol.m]: messageAvailableMobile read: TRUE");
         }
         else
         {
             NSLog(@"[CommunicationProtocol.m]: messageAvailableMobile read: FALSE");
         }
     }
                                               onFail:^(NSError *error)
     {
         NSLog(@"[CommunicationProtocol.m]: %@",error);
     }];
}

-(void) readMessageAvailableDevice
{
    [[EMConnectionManager sharedManager] readResource:@"messageAvailableDevice" onSuccess:^(id readValue)
     {
         [self setMessageAvailableDevice:[readValue intValue]];
         if([self messageAvailableDevice])
         {
             NSLog(@"[CommunicationProtocol.m]: messageAvailableDevice read: TRUE");
         }
         else
         {
             NSLog(@"[CommunicationProtocol.m]: messageAvailableDevice read: FALSE");
         }
     }
                                               onFail:^(NSError *error)
     {
         NSLog(@"[CommunicationProtocol.m]: %@",error);
     }];
}

-(Boolean) waitForMessageAvailableMobile: (Boolean) status
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{
    uint8_t retries = 0;
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    [self readMessageAvailableMobile];
    while([self messageAvailableMobile] != status)
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    {
        [NSThread sleepForTimeInterval:5];
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        [self readMessageAvailableMobile];
        if([self messageAvailableMobile] != status)
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        {
            if(retries++ == MAX_RETRIES)
            {
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                NSLog(@"[CommunicationProtocol.m]: Timeout while waiting for answer");
                return FALSE;
            }
        }
    }
    return TRUE;
}

-(Boolean) waitForMessageAvailableDevice: (Boolean) status
{
    uint8_t retries = 0;
    [self readMessageAvailableDevice];
    while([self messageAvailableDevice] != status)
    {
        [NSThread sleepForTimeInterval:5];
        [self readMessageAvailableDevice];
        if([self messageAvailableDevice] != status)
        {
            if(retries++ == MAX_RETRIES)
            {
                NSLog(@"[CommunicationProtocol.m]: Timeout while waiting for answer");
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                return FALSE;
            }
        }
    }
    return TRUE;
}

-(NSString*) readMessage
{
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    __block uint8_t numPackets = 1, numBytes; //HACK!
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    __block NSMutableString *message = [[NSMutableString alloc] init];
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    [message setString:@""];
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    //if([self waitForMessageAvailableDevice:TRUE])
    if(1) //HACK!
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    {
        [[EMConnectionManager sharedManager] readResource:@"numPackets" onSuccess:^(id readValue)
         {
             numPackets = (uint8_t) [readValue unsignedCharValue];
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             NSLog(@"[CommunicationProtocol.m]: numPackets read: %d",numPackets);
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         }
                                                   onFail:^(NSError *error)
         {
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             NSLog(@"[CommunicationProtocol.m]: %@",error);
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             numPackets = 0;
         }];
        if(numPackets)
        {
            for(int i = 0; i < numPackets; i++)
            {
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                //if([self waitForMessageAvailableDevice:TRUE])
                if(1)//HACK!
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                {
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                    [[EMConnectionManager sharedManager] readResource:@"numBytes" onSuccess:^(id readValue)
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                     {
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                         numBytes = (uint8_t) [readValue unsignedCharValue];
                         NSLog(@"[CommunicationProtocol.m]: numBytes read: %d",numBytes);
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                     }
                                                               onFail:^(NSError *error)
                     {
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                         NSLog(@"[CommunicationProtocol.m]: %@",error);
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                         numBytes = 0;
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                     }];
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                    if(numBytes)
                    {
                        [[EMConnectionManager sharedManager] readResource:@"data" onSuccess:^(id readValue)
                         {
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                             if([readValue length] < numBytes)
                             {
                                 NSLog(@"[CommunicationProtocol.m]: WARNING: Device issued wrong numBytes, possible truncated message.");
                             }
                             [message appendString:[readValue substringToIndex:numBytes]];
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                             NSLog(@"[CommunicationProtocol.m]: data read: %@",message);
                         }
                                                                   onFail:^(NSError *error)
                         {
                             NSLog(@"[CommunicationProtocol.m]: %@",error);
                         }];
                    }
                    [[EMConnectionManager sharedManager] writeValue:@"0" toResource:@"messageAvailableDevice" onSuccess:^
                     {
                         NSLog(@"[CommunicationProtocol.m]: messageAvailableDevice set to FALSE");
                         NSLog(@"[CommunicationProtocol.m]: packet read");
                     }
                                                             onFail:^(NSError *error)
                     {
                         NSLog(@"[CommunicationProtocol.m]: %@",error);
                     }
                     ];
                }
                else
                {
                    NSLog(@"[CommunicationProtocol.m]: Error, resetting message");
                    [message setString:@""];
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                }
            }
        }
    }
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    NSLog(@"[CommunicationProtocol.m]: Message received: %@",message);
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    return message;
}

-(Boolean) writeMessage: (NSString*) message
{
    unsigned long remainingBytes = [message length];
    uint8_t numBytes, current_index = 0;
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    __block Boolean status = TRUE; //HACK
    __block Boolean blockCompleted = TRUE; //HACK!
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    [[EMConnectionManager sharedManager] writeValue:@"0" toResource:@"messageAvailableMobile" onSuccess:^
     {
         status = TRUE;
         NSLog(@"[CommunicationProtocol.m]: messageAvailableMobile set to FALSE");
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         blockCompleted = TRUE;
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     }
                                             onFail:^(NSError *error)
     {
         NSLog(@"[CommunicationProtocol.m]: %@",error);
         status = FALSE;
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         blockCompleted = TRUE;
     }];
    while(blockCompleted != TRUE)
    {
        [NSThread sleepForTimeInterval:1];
    }
    NSLog(@"[CommunicationProtocol.m]: messageAvailableMobile write block completed");
    blockCompleted = FALSE;
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    [[EMConnectionManager sharedManager] writeValue:[NSNumber numberWithUnsignedChar:(unsigned char)([message length]/MAX_STRING_LENGTH)+1] toResource:@"numPackets" onSuccess:^
     {
         status = TRUE;
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         NSLog(@"[CommunicationProtocol.m]: numPackets set to %u",([message length]/MAX_STRING_LENGTH) + 1);
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     }
                                             onFail:^(NSError *error)
     {
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         NSLog(@"[CommunicationProtocol.m]: %@",error);
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         status = FALSE;
     }
     ];
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    NSLog(@"[CommunicationProtocol.m]: status is: %d",status);
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    if(status != FALSE)
    {
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        NSLog(@"[CommunicationProtocol.m]: Carrying on after numPackets...");
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        while(remainingBytes)
        {
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            if(![self waitForMessageAvailableMobile:FALSE])
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            {
                status = FALSE;
                break;
            }
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            NSLog(@"[CommunicationProtocol.m]: Device is ready for next packet");
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            if(remainingBytes > MAX_STRING_LENGTH)
            {
                numBytes = MAX_STRING_LENGTH;
                remainingBytes -= MAX_STRING_LENGTH;
            }
            else
            {
                numBytes = remainingBytes;
                remainingBytes = 0;
            }
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            [[EMConnectionManager sharedManager] writeValue:[NSNumber numberWithUnsignedChar:(unsigned char)numBytes] toResource:@"numBytes" onSuccess:^
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             {
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                 NSLog(@"[CommunicationProtocol.m]: numBytes set to %d", numBytes);
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                 status = TRUE;
             }
                                                     onFail:^(NSError *error)
             {
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                 NSLog(@"[CommunicationProtocol.m]: %@",error);
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                 status = FALSE;
             }
             ];
            if(status != FALSE)
            {
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                NSLog(@"[CommunicationProtocol.m]: Carrying on after numBytes...");
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                NSString *data = [message substringWithRange:NSMakeRange(current_index, numBytes)];
                current_index += numBytes;
                [[EMConnectionManager sharedManager] writeValue:data toResource:@"data" onSuccess:^
                 {
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                     NSLog(@"[CommunicationProtocol.m]: data set to: %@",data);
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                     status = TRUE;
                 }
                                                         onFail:^(NSError *error)
                 {
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                     NSLog(@"[CommunicationProtocol.m]: %@",error);
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                     status = FALSE;
                 }
                 ];
                if(status != FALSE)
                {
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                    NSLog(@"[CommunicationProtocol.m]: Carrying on after data...");
                    [[EMConnectionManager sharedManager] writeValue:@"1" toResource:@"messageAvailableMobile" onSuccess:^
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                     {
                         status = TRUE;
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                         NSLog(@"[CommunicationProtocol.m]: messageAvailableMobile set to TRUE");
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                         NSLog(@"[CommunicationProtocol.m]: Packet written");
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                     }
                                                             onFail:^(NSError *error)
                     {
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                         NSLog(@"[CommunicationProtocol.m]: %@",error);
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                         status = FALSE;
                     }
                     ];
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                    NSLog(@"[CommunicationProtocol.m]: Carrying on after messageAvailableMobile...");
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                }
            }
        }
    }
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    if(![self waitForMessageAvailableMobile:FALSE])
    {
        NSLog(@"[CommunicationProtocol.m]: Device has processed the message");
    }
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    return status;
}

-(Boolean) establishConnection
{
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    NSLog(@"[CommunicationProtocol.m]: Establishing connection...");
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    if([self writeMessage:@"Hello"])
    {
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        NSLog(@"[CommunicationProtocol.m]: Hello sent");
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        NSString *answer = [self readMessage];
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        NSLog(@"[CommunicationProtocol.m]: Answer received");
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        if([answer isEqualToString:@"Hello"])
        {
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            NSLog(@"[CommunicationProtocol.m]: Connection established");
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            return TRUE;
        }
    }
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    NSLog(@"[CommunicationProtocol.m]: Error while establishing connection");
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    return TRUE; //HACK!
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}
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-(Boolean) updateTime: (NSDateComponents*) date
{
    NSMutableString *command = [NSMutableString stringWithFormat: @"A5"];
    NSInteger year = [date year];
    year = year - (year/100)*100;
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    [command appendString:[NSString stringWithFormat:@"%02ld",(long)year]];
    [command appendString:[NSString stringWithFormat:@"%02ld%02ld%02ld%02ld%02ld",(long)[date month],(long)[date day],(long)[date hour],(long)[date minute],(long)[date second]]];
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    [self writeMessage:command];
    NSString *answer = [self readMessage];
    if([answer isEqualToString:@"P51"])
    {
        return TRUE;
    }
    return FALSE;
}

-(Boolean) updatePrice: (uint8_t) channel : (uint8_t) product : (uint8_t) eur : (uint8_t) cents
{
    NSMutableString *command = [NSMutableString stringWithFormat: @"A6%01d%01d%02d%02d",channel,product,eur,cents];
    [self writeMessage:command];
    NSString *answer = [self readMessage];
    if([answer isEqualToString:@"P61"])
    {
        return TRUE;
    }
    return FALSE;
}

-(Boolean) updateProductName: (uint8_t) channel : (uint8_t) product : (NSString*) name
{
    if([name length] > MAX_PRODUCT_NAME_LENGTH)
    {
        name = [name substringToIndex:MAX_PRODUCT_NAME_LENGTH-1];
    }
    NSMutableString *command = [NSMutableString stringWithFormat: @"A7%01d%01d%@",channel,product,name];
    [self writeMessage:command];
    NSString *answer = [self readMessage];
    if([answer isEqualToString:@"P71"])
    {
        return TRUE;
    }
    return FALSE;
}
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-(NSString*) readSensorData
{
    NSString *command = @"A4";
    [self writeMessage:command];
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    //NSString *answer = [self readMessage];
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    NSMutableString *answer = [[NSMutableString alloc]initWithString:@"P400015000150001500000001001003005002000001002"];
    for(int i = 0; i < 4; i++)
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    {
        [answer appendString:@"0"];
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        [answer appendString:@"1"];
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    }
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    for(int i = 0; i < 12; i++)
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    {
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        [answer appendString:@"0"];
        [answer appendString:@"0"];
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    }
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    [answer appendString:@"0"];
    [answer appendString:@"0"];
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    if([answer length] > 1 && [[answer substringToIndex:2]isEqualToString:@"P4"])
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    {
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        NSLog(@"[CommunicationProtocol.m]: sensorStatus returned: %@",answer);
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        return answer;
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    }
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    return nil;
}
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-(NSString*) readSalesLog : (NSDateComponents*) start : (NSDateComponents*) end
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{
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    NSMutableString *startDate = [NSMutableString stringWithString:@""];
    NSMutableString *endDate = [NSMutableString stringWithString:@""];
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    NSMutableString *command = [NSMutableString stringWithString:@"A2"];
    if(start == nil)
    {
        [startDate setString:@""];
    }
    else
    {
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        NSInteger year = [start year];
        year = year - (year/100)*100;
        [startDate appendString:[NSString stringWithFormat:@"%02ld",(long)year]];
        [startDate appendString:[NSString stringWithFormat:@"%02ld%02ld%02ld%02ld",(long)[start month],(long)[start day],(long)[start hour],(long)[start minute]]];
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    }
    if(end == nil)
    {
        [endDate setString:@""];
    }
    else
    {
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        NSInteger year = [end year];
        year = year - (year/100)*100;
        [endDate appendString:[NSString stringWithFormat:@"%02ld",(long)year]];
        [endDate appendString:[NSString stringWithFormat:@"%02ld%02ld%02ld%02ld",(long)[end month],(long)[end day],(long)[end hour],(long)[end minute]]];
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    }
    [command appendString:startDate];
    [command appendString:@"-"];
    [command appendString:endDate];
    [self writeMessage:command];
    //NSString *answer = [self readMessage];
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    NSMutableString *answer = [[NSMutableString alloc]initWithString:@"P21408161036000001000000110450000001P21409012216000100000000220900000100P21409032307000000010502330800000000P21409070540000000020000440350000001P2P2"];
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    if([answer length] > 1 && [[answer substringToIndex:2]isEqualToString:@"P2"])
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    {
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        NSLog(@"[CommunicationProtocol.m]: saleLog returned: %@",answer);
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        return answer;
    }
    return nil;
}
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@end