Thank you for the link, but I'm not sure that it will work on my device, since the project is made for Fluke-87 there, and the arduino code is written specifically for it, since there are special commands there, but I don't know what commands are on mine, I also don’t know at what speed the exchange will be 9600 or 115200, of course I can try it, but I don’t think it will work. Perhaps all the same, someone has already done it for my oscilloscope.