public void sendMessage(String mac,MessageItem item,OnSendMessageListener listener){
  sendMessage(mac,item,false,listener);
}

public void sendMessage ( String mac , MessageItem item , OnSendMessageListener listener ) { sendMessage ( mac , item , false , listener ) ; }
send a message to a remote device . if the local device did ' t connected to the remote devices , it will call connectdevice ( ) , then send the message . if you want to get a response from the remote device , call another overload method , this method default will not obtain a response .
