![]() ![]() delay() actually calls micros(), to see how long it has been sitting around doing nothing. The resolution of millis() is the same as delay(). If you have Processing, you can try my code. When you push down a button, what seems like a single change to slow humans is really multiple presses to an Arduino. ![]() Hehe! That was just randomness (I've heard that it causes some glitch on the Mega, or something). ![]() In conclusion, this example can be used to do a simple fade without delay (). If it’s time to update the LED fading, it happens. The first if-statement is the standard reset millis () check. For example, you could change the interval to a random time between 1mS, every time the LED goes on or off.īut without the the "!!!" unless you like mysteries. The function’s argument thisMillis is the millis () timestamp from loop (). You would probably only want to change it when the "time's up". I've haven't used interrupts on the Arduino, so someone else can jump-in and help with that.Īctually, you wouldn't want to change the time every-time through the loop. If you are doing something else complicated, or something else that can't be interrupted, and you only get-back to checking the time every 10 minutes. Sure! But, it's up to your program to be checking the time in a loop. For most timing applications, you want to keep the program going, while keeping track of the time in the background.Īlso, is millis() accurate enough to execute a task every 15 minutes? You should use it if you are using arduino, and also you should post in the arduino forum. I'd say you should probably avoid using delay, unless you truly want to delay or pause. Delay () Delay is an arduino function wrapper that calls vtaskdelay. At first glance you may doubt the usefulness of this function. You can get the total time since your program started, in milliseconds using millis(), or in microseconds using micros(). millis (), on the other hand, is a function that returns the amount of milliseconds that have passed since program start. You can change the interval every time throught the loop,* and you can have multiple intervals & multiple previous-times (with different variable names) for multiple-different timers running at the same time. A well known Arduino function is delay () which pauses the program for an amount of milliseconds specified as parameter. Take another look at the Blink Without Delay example. ![]()
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