Run millis timers with priority, run some always and others when there is still time. Increase a value with acceleration when a button is kept pressed. Play a tune without delay, using millis() and a "update" function as an alternative for the ToneMelody example. Maybe in the future I will add a few more: These examples are in the Public Domain, because they are only small and basic examples for using millis(). Use a single button to select more than 40 different commands. On a Arduino Zero or MKR board, or 27000 on a ESP32 board. This sketch runs 400 millis timers at the same time on a Arduino Uno, or 7000 millis timers This example shows how to timestamp events with millis(). ![]() Using millis and a finite state machine.Ĭopy events from a button to a led with a delay of two seconds. Or without a carriage return or linefeed. Use millis as a timeout when receiving serial data to make it possible that data is received with This example sketch combines millis(), boolean variables and a finite state machine. To turn something on and off by pressing the same button. The brightness of a led (on any pin) can be set by entering a value in the serial monitor.Ī boolean variable can be used to do something just once. Instead of millis(), the micros() function is used to create a software PWM signal. The brightness is updated with millis() with a fixed interval.Ī led and a resistor is needed, and a PWM pin is used.Ī led that blinks softly like a heartbeat, using millis() to update the brightness. Measure forĮxample how long the function analogRead() takes in three different ways.Ī led with soft pulsating brightness. Use millis() and micros() to measure how long a piece of code takes. That is done by using a extra (buffered) boolean variable. The led does not turn off immediately, but it turns off at the end of its "on" time. The same as "millis_within_millis.ino", but with extra specific working. Using millis() to blink a led, and another millis() software timer to turn on and off The compiled code uses less memory, but the source code is harder to understand. This sketch does exactly the same as "millis_short_press_long_press.ino" but a finite state machine Press a button for a short time to turn a led on, and press the button for a long time The serial monitor is used as output to show the time. Software timer stops itself, thus creating a single event.Ī clock with hours, minutes and seconds. ![]() A better name is "a single shot timer".Ī software timer is started. The values for the time to set the led on and offĪ single "delay" with millis(). Is "on" is different than the time the led is "off".īlink a led with a rhytm. Three different software timers with millis are used to send something to the serial monitor.Īn example to change the interval. It uses the serial monitor and no extra hardware is required. These sketches can be simulated with Wokwi. I hope you like them and have fun with the sketches □ These are small demonstration sketches to show how to use millis() in different situations. To go to a more advanced level of programming, it is possible to use the timer management libraries (Timer.h,Timer2.h, TimerOne.h, etc.) It is also possible to play with the registers of the microcontroller to configure the internal timers. The Arduino millis() function can be used in almost every situation.
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