I have a question, how to get a time from arduino.
Board：Arduino Uno R3 Timer:SD2405
I want to get the time Like this： when I press the button, I can get a time like 15:20:20.8642.
Now, I can get the time 15:20:20, but I do not knwo how to get the 0.8642.
Anybody knows how to do it?