DFRobot Wifi Shielf v2.1 Data Mode

Hi,

I've manage to get the DFRobot wifi shield v2.1 working by following the tutorials and referencing the manual and other documentation.

It's a little tricky at first but then you get into it.

The tutorial focusses on setting up the shield by putting the jumpers into USB/command mode then allowing you to via the serial monitor setup the shield to connect to an existing wifi network, setting up an IP address or DHCP, then setting up the shield to act as a server on port 4000, then finally saving that config and making all those commands/settings initialise the shield when it restarts again. Once the shield is restarted and the jumpers put into wifi/data mode I can get my laptop to connect to the Arduino board via the wifi shield which is great.

What I need is to have the Arduino connect to other remote sites. I've been able to do this by putting it back into command mode (via the jumpers) then instead of setting it up as a server, setting it up to connect to a specific server - in this case my laptop. This is also nice however I'd like to have the Arduino board connect to multiple servers rather than just one.

Once the board is back in wifi/data mode I've been able to write a script that programmatically tells the shield to connect to a specific server. I've done with this the following code (note it's only the command sending part):
[code]
...
Serial.print( "+++" ); // While in data mode, we can send +++ and the shield will go into command mode.
Serial.flush();
delay( 1500 ); // We need to wait for about a second, her we wait 1.5sec
Serial.println( "AT+NCTCP=192.168.1.200,80" ); // Connect to 192.168.1.200 on port 80, in this case apache
Serial.flush();
delay( 100 );
Serial.print( "\x1B" "S0" ); // Send escape character then letter 'S' and CID (in this case 0)
Serial.println( "GET "+ paramURL+ " HTTP/1.0" ); // Send GET command
Serial.println( "" );
Serial.println( "" );
Serial.print( "\x1B" "E" ); // End HTTP request, this again from documentation.
Serial.flush();
delay( 100 );
...
[/code]

So the above snippet works, it allows me to specify a server with code, send through a basic HTTP request to the web server on my laptop.

My problem however is receiving data.

From the above code I get a HTTP response, the problem however comes in when I try read the complete response. Here is an example of how I read the HTTP response from the server
[code]
...
char HTMLResponse[ 1024 ]; // Text buffer for our HTTP response, 1024 is enough for data and headers
int index = 0;
while ( Serial.available() > 0 ) {
HTMLResponse[ index ] = Serial.read();
delay( 10 );
index++;
}
...
[/code]
The problem with the above response is that it only allows me to read 64bytes of the response.
This apparently is due to the serial buffer being only 64bytes. I've checked and Serial.available() only returns at most 64 bytes. This is a problem because the headers in the HTTP response take up more than the first 64bytes of the response.

The alternative is to use the ATO command, I saw this in the same section in the manual as the bit that allows me to send +++ to enter comment mode. So by doing a ATO we're supposed to be able to kick back into data mode. Other wifi shield do this is other types of commands but in essence allow you to kick into data mode to tell the shields to connect to specific address then back back into data more to allow the code to send and receive data.

The manual states "[i]The ATO command (terminated by the ASCII character “O”, not the number 0) is used to return to data mode.[/i]"

My problem is that I can't get that ATO command right. I've tried sending ATO and ATO <ESC>O but I just can't get out of command mode. I've tried the following but no luck.
[code] Serial.print( "ATO" );
Serial.print( "\x1B" "O" );
Serial.flush();
delay( 1100 );
[/code]
and
[code] Serial.print( "\x1B" "O" );
Serial.flush();
delay( 1100 );
[/code]

I've spend a few days trying all kinds of things but just can't kick out of the command mode. I've tried "[i]Applying the “AT+XEHT=1” command (Enable Hardware Trigger), you can change between data mode and command mode using GPIO 10, without escape sequence (“+++”).[/i]" but can't get that working either.

Please help, I've spend days trying to get it work but but can't, so close but just so far.