Hi guys Can anyone assist me with a code that I can use to time an event using RFID tags. The first swipe should start the timer whilst the second swipe should stop the timer.

Thanks for your assistance

Sure we can assist. What have you got so far? Can you expand on the requirements? Does the timer count up or down? Are you displaying the timer or do you just need to know how long it was between the two swipes? If that's the case it's dirt easy. When you see the first swipe, take a reading from millis and store it in a variable. When you see the second swipe do the same. Then subtract those two time stamps to figure out how long it took between the two swipes.