Последовательное управление OBD-II через Wi-Fi ⇐ IOS

[Anonymous]

Мне нужно отправлять последовательные команды на устройство Wi-Fi OBD-II через мой iPad.
Для этого я использовал библиотеку CocoaAsyncSocket для подключения моего iPad к OBD-II, и она работает нормально. Затем я отправил на устройство команду «010C/r», чтобы получить скорость вращения (об/мин) автомобиля, но это не сработало. Мне кажется, я использую для этого неправильный синтаксис, но я не уверен.
Вот мой код Objective-C:
static const int ddLogLevel = LOG_LEVEL_VERBOSE;

#define HOST @"192.168.0.10"

#define USE_SECURE_CONNECTION 0
#define VALIDATE_SSL_CERTIFICATE 1

#define READ_HEADER_LINE_BY_LINE 0

@implementation SimpleHTTPClientAppDelegate

@synthesize window = _window;
@synthesize viewController = _viewController;

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{

[DDLog addLogger:[DDTTYLogger sharedInstance]];

DDDispatchQueueLogFormatter *formatter = [[DDDispatchQueueLogFormatter alloc] init];
[formatter setReplacementString:@"socket" forQueueLabel:GCDAsyncSocketQueueName];
[formatter setReplacementString:@"socket-cf" forQueueLabel:GCDAsyncSocketThreadName];

[[DDTTYLogger sharedInstance] setLogFormatter:formatter];

asyncSocket = [[GCDAsyncSocket alloc] initWithDelegate:self delegateQueue:dispatch_get_main_queue()];

NSError *error = nil;
NSString *host = HOST;

#if USE_SECURE_CONNECTION
uint16_t port = 443; // HTTPS
#else
uint16_t port = 35000; // HTTP
#endif

if (![asyncSocket connectToHost:host onPort:port error:&error])
{
DDLogError(@"Unable to connect to due to invalid configuration: %@", error);
}
else
{
DDLogVerbose(@"Connecting to \"%@\" on port %hu...", host, port);
}

#if USE_SECURE_CONNECTION

#if VALIDATE_SSL_CERTIFICATE
{
DDLogVerbose(@"Requesting StartTLS with options: (nil)");
[asyncSocket startTLS:nil];
}
#else
{
NSDictionary *options =
[NSDictionary dictionaryWithObject:[NSNumber numberWithBool:NO]
forKey:(NSString *)kCFStreamSSLValidatesCertificateChain];

DDLogVerbose(@"Requesting StartTLS with options:\n%@", options);
[asyncSocket startTLS:options];
}
#endif

#endif

self.window.rootViewController = self.viewController;
[self.window makeKeyAndVisible];
return YES;
}

- (void)socket:(GCDAsyncSocket *)sock didConnectToHost:(NSString *)host port:(UInt16)port
{
DDLogVerbose(@"socket:didConnectToHost:%@ port:%hu", host, port);

NSString *requestStrFrmt = @"010C\r";

NSString *requestStr = [NSString stringWithFormat:requestStrFrmt, HOST];
NSData *requestData = [requestStr dataUsingEncoding:NSUTF8StringEncoding];

[asyncSocket writeData:requestData withTimeout:-1.0 tag:0];

DDLogVerbose(@"Sending HTTP Request:\n%@", requestStr);

#if READ_HEADER_LINE_BY_LINE

[asyncSocket readDataToData:[GCDAsyncSocket CRLFData] withTimeout:-1.0 tag:0];

#else

NSData *responseTerminatorData = [@"\r\n\r\n" dataUsingEncoding:NSASCIIStringEncoding];

[asyncSocket readDataToData:responseTerminatorData withTimeout:-1.0 tag:0];

#endif
}

- (void)socketDidSecure:(GCDAsyncSocket *)sock
{
DDLogVerbose(@"socketDidSecure:");
}

- (void)socket:(GCDAsyncSocket *)sock didWriteDataWithTag:(long)tag
{
DDLogVerbose(@"socket:didWriteDataWithTag:");
}

- (void)socket:(GCDAsyncSocket *)sock didReadData:(NSData *)data withTag:(long)tag
{
DDLogVerbose(@"socket:didReadData:withTag:");

NSString *httpResponse = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];

#if READ_HEADER_LINE_BY_LINE

DDLogInfo(@"Line httpResponse: %@", httpResponse);

if ([data length] == 2)
{
DDLogInfo(@"");
}
else
{
[asyncSocket readDataToData:[GCDAsyncSocket CRLFData] withTimeout:-1.0 tag:0];
}

#else

DDLogInfo(@"Full HTTP Response:\n%@", httpResponse);

#endif

}

- (void)socketDidDisconnect:(GCDAsyncSocket *)sock withError:(NSError *)err
{
DDLogVerbose(@"socketDidDisconnect:withError: \"%@\"", err);
}

@end

Вот журналы:
2014-05-28 17:02:05:559 [main] Connecting to "192.168.0.10" on port 35000...
2014-05-28 17:02:05:619 [main] socket:didConnectToHost:192.168.0.10 port:35000
2014-05-28 17:02:05:621 [main] Sending HTTP Request:
010C

2014-05-28 17:02:05:622 [main] socket:didWriteDataWithTag:


Подробнее здесь: https://stackoverflow.com/questions/239 ... over-wi-fi