Trying to send telnet commands to a server - ios

Question

I'm trying to connect to a telnet server (running NetLinx by AMX, in case it matters) and send it a few commands as if I opened Terminal and did "telnet (address)" and started typing commands. I can receive messages but can't send them using this code I found from a tutorial at http://www.raywenderlich.com/3932/how-to-create-a-socket-based-iphone-app-and-server:
- (void)sendMessage: (NSString*) message{ //called when the user interacts with UISwitches, is supposed to send message to server
NSData *data = [[NSData alloc] initWithData:[message dataUsingEncoding:NSASCIIStringEncoding]]; //is ASCIIStringEncoding what I want?
[outputStream write:[data bytes] maxLength:[data length]];
NSLog(#"Sent message to server: %#", message);
}
- (void)initNetworkCommunication { //called in viewDidLoad of the view controller
CFReadStreamRef readStream;
CFWriteStreamRef writeStream;
CFStreamCreatePairWithSocketToHost(NULL, (CFStringRef)#"192.168.1.90", 23, &readStream, &writeStream); //192.168.1.90 is the server address, 23 is standard telnet port
inputStream = (__bridge NSInputStream *)readStream;
outputStream = (__bridge NSOutputStream *)writeStream;
[inputStream setDelegate:self];
[outputStream setDelegate:self];
[inputStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
[outputStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
[inputStream open];
[outputStream open];
}
It appears to send some kind of message to the server but maybe in the wrong format. My guess is that it's a string formatting problem. Is ASCII what I want to use for telnet? If I take the message it prints when it sends a command and paste that right into Terminal with telnet running, the server receives and processes the command normally.
Here is an example command that I'm trying to send: SEND_STRING dvJAND,"'#AUX2=0',$0D"
Another mystery is that, reading the input stream and printing, I see this when the above is sent:
2013-08-20 00:20:23.791 [7548:907] server said: S
2013-08-20 00:20:23.793 [7548:907] server said: END_STRING dvJAND,"'#AUX
2013-08-20 00:20:23.795 [7548:907] server said: 2=0',$0D"
But when I type that command in Terminal, the server does not respond at all and does its job as it should.

Answer 1

Found out that the only thing I was doing wrong was not ending my messages with \r! I read that you need to end with \n, but \r is what did it for me.