Thanks for replying I want to monitor the machine behaveior through serial port and a software i just need a software to show me when it starts to work or stops and it should be flexible so i can add more features to it
Bad idea.Connections to machines by tinkerers can create failure points that can cause expensive repairs or even machine malfunction. People could get hurt by spurious signals being introduced.Ray
it is noncommercial,but it is something simple I think so I want your help and the others to do it.I don't want to pay for something which I can do on myself and with your and the others help.
3-I didn't understand what you mean.
4-about the place of and machines I can send you a file to see that.
if it is possible download it maybe you can program it.
the data between arduino and pc should be with serial port.