As you understand I need a hardware timer (counting clock ticks). Millis () makes demanding to ckeck if "old value" is smaller than millis () value (normal run from start until rollover) or greater (1st time after rollover) before any compare.
I am creating a timer for a race. I have a photosensor that has a laser pointed to so when someone crosses the finish, it trips the sensor, and the system logs the racer's time. I am using millis() to time the race, but I need the timer to start when I push the button. I have tried using edge detection to start the timer, but the timer starts when the program starts, not when the program ...
Thanks to several real knowledgeable members I'm starting to understand the nuances of esp32 timers. I still has a few question to resolve: In API version 2.0 you selected which 1 of the 4 timers you wanted in "timerBegin(timer#, pre-scaler,count_direction)" now there is only 1 parameter "Frequency". Where do I select the timer number? A second question is what are the allowable frequencies ...
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