1) If I send the command including curly braces I get response invalid command so that is not the right way 2) I tried sending just string and that did not work 3) 4) and 5) I am not exactly clear how would I send the command in this form. Can you use {02H} example and explain what you mean.
The manual I have does not say anything more than what I told you and unfortunatelly there is no C or Basic example in it either. That would definitelly help. I contacted the tech support for this device and this is reply: "Using 02H in your program will probably work because it should know that it is hex". All I know is that whatever I tried so far my response is "FF" which means invalid command. I appreciate for help, Pedja