 <p>I didn't read the manual - but I think the response you got from the server is that of a single command.</p> <p>You ran <code>TRUN AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA...</code> - so it tried to run the command <code>AAAAAAAAAAAAAAA...</code>. </p> <p>The response is: <code>TRUN Completed</code> - Indicates it ran the <code>TRUN</code> command.<br> <code>Unknown Command</code> - Indicates that the command specified as an argument (<code>AAAAAAAAAA...</code>) is unknown.</p> <p>There is no reason why your code should split the request.</p> <p>Try sending the command <code>TRUN AAA</code> to verify - you should get the same output.</p>