Timing
Official libraries
AudioFrequencyMeter :
Get the fundamental pitch of an audio signalNTPClient :
An NTPClient to connect to a time serverRTCZero :
Allows to use the RTC functionalities. For Arduino Zero, MKRZero and MKR1000 only.
Contributed by the community
AceTime :
Date, time, timezone classes for Arduino supporting the full IANA TZ Database to convert epoch seconds to date and time components in different time zones.AceTimeClock :
Clock classes for Arduino that provide an auto-incrementing count of seconds since a known epoch which can be synchronized from external sources such as an NTP server, a DS3231 RTC chip, or an STM32 RTC chip.Adafruit Si5351 Library :
Driver for Adafruit's Si5351 Clockgen BreakoutAnalogRTCLib :
Library for Analog Devices Real Time Clocks.Animation Tools :
Simplifies creating behaviours for Servos and LEDsAntiDelay :
AntiDelay is a library that aims to provide non-blocking delay functionality.arduino-timer :
Timer library for delaying function callsarduino-timer-api :
Simple cross-platform API for multitasking on timer interrupt handlersArduinoSensors :
A Library of Libraries of SensorsArduinoThread :
A simple way to run Threads on ArduinoArduinoThreadRunOnce :
Run an ArduinoThread just one timeArtron DS1338 :
Arduino library of RTC DS1338.Async_Operations :
A library for accurately keeping track of long tasks without blocking the main threadAsyncDelay :
Simple abstraction library implementing delays and timeouts.Asynchrony :
A way to schedule functions to be executed in the future, similar to asynchrony in other languages.AsyncTimer :
JavaScript-like async timing functions (setTimeout, setInterval).avdweb_SAMDtimer :
Timer library for the SAMD21 and Arduino Zeroavdweb_VirtualDelay :
Allows using (multiple) delays without blocking code execution. Arduino Uno and Zero.AVR Standard C Time Library :
<h3>Real Time functions for Goldilocks ATmega1284p & ATmega2560</h3>avrCalibrate :
This library determines OSCCAL calibration values for MCU clock frequency and internal reference voltage and loads them at setup.avrtos :
RTOS for AVR Arduino microcontrollers (Uno Mega)Azure RTOS ThreadX :
Azure RTOS ThreadX Library for ArduinoBasicTimer :
Basic Timer InterfaceBlockNot :
BlockNot gives you non-blocking timers with simplicity.bluemicro_engine :
Engine to implement a loop in order to decouple the progression of time from user input and processor speed.buildTime :
Library will help you to get compile timeCallbackHelper :
Tool to generate std::function like callback APIs without the huge memory footprint of std::functionCallMyFunction :
Arduino library to call function with time restrictionsChrono :
Chronometer/stopwatch library that counts the time passed since started.CleanRTOS :
Makes use of FreeRTOS on ESP32 much easier and safer.CMMC Easy :
CMMC Easy is a library for managing time without delay functionCompileTime :
Automatically set the hours, minutes seconds, year, month, and day in your project when uploading!CoopTask :
Portable C++ library for cooperative multitasking like Arduino Scheduler on ESP8266/ESP32, AVR, Linux, WindowsCoopThreads :
Lightweight, platform agnostic, stackful cooperative threads libraryCountimer :
A simple library for creating timers and counters.CronAlarms :
Schedule alarms to occur at specific times with crontab syntax.cronos :
A std::chrono wrapper for target system's native tick count.DCF77 :
Read and decode the atomic time broadcasted by the DCF77 radiostation.dcf77_xtal :
DCF77 decoder with excellent noise tolerance.DCF77Decode :
Focusing on clean code, this library implements almost the entire public DCF77 standard in C.Debouncer :
Debounce library for ArduinoDelayExec :
A library to defer executionsDFRobot_DS1307 :
Define infrastructure of DFRobot_DS1307 class(SKU: DFR0151).DFRobot_DS323X :
DS323X driver library.DMOscillator :
A library that makes easy on/off control on a pin at fixed or dynamic rate.DMTimer :
A library that simplifies non blocking recurrent calls.Dorpac-timer :
A library for implementing very simple timersDS1307 Emulator :
An emulator of the DS1307, which transform the Arduino in an RTC chip without actually having a physical RTC.DS1307newAlarms :
Adding weekday alarms to the DS1307 RTC functionalityDS1307RTC :
Use a DS1307 Real Time Clock chip with the Time libraryDS3231 :
Arduino library for the DS3231 real-time clock (RTC)DS3231-RTC :
C++ Library for the DS3231 real-time clock (RTC) module, ready to use on Arduino IDE and PlatformIO.DS3231_RTC :
Arduino library for the DS3231 real-time clock (RTC)ds3231FS :
Arduino Library for Maxim Integrated DS3231 Real-Time Clock.DS3232RTC :
Arduino Library for Maxim Integrated DS3232 and DS3231 Real-Time Clocks.DST RTC :
Arduino library for automatically adjusting RTC time for Daylight Saving Time (DST)DTime :
Date plus Time workaround serviceDueTimer :
Timer Library fully implemented for Arduino DUEEasyNTPClient :
Library to read time from Network Time Protocol (NTP) servers.EasyTask :
A lightweight but powerful implementation of tasking manager.EdgieD :
Simple, generalised edge detection for variables as well as input signalselapsedMillis :
Makes coding responsive sketches easier.ESP32Time :
Set and retrieve internal RTC time on ESP32 boards.ESPPerfectTime :
SNTP library that provides more accurate time for ESP8266/ESP32.Every :
Non-blocking replacements for delay().everytime :
A easy to use library for periodic code execution.EveryTimer :
A library providing the possibility to call a function at specific time intervals.Executive :
Execute routines to specified scheduleezTime :
ezTime - pronounced "Easy Time" - is a very easy to use Arduino time and date library that provides NTP network time lookups, extensive timezone support, formatted time and date strings, user events, millisecond precision and more.FaBo 215 RTC PCF2129 :
A library for FaBo RTC I2C Brickfast_samd21_tc :
TC3, TC4 or TC5 timer library for SAMD21 microcontrollers.FC0005748911 :
Firechip - Micro Crystal RV-8263 Arduino Library a Real-Time Clock Module with I2C-BusFifteenStep :
A general purpose Arduino MIDI sequencer library.FireTimer :
Simple and non-blocking library to time the execution of processesflex_DST :
A library for observing DST according to user predefined parameters.FreeRTOS :
FreeRTOS Real Time Operating System implemented for AVR (Uno, Nano, Leonardo, Mega).FreqPeriodCounter :
Smart library with comprehensive functions for counting (multiple) frequencies. For Arduino Uno and Zero.FrequencyTimer2 :
Generate a frequency using Timer2frt :
Lightweight, easy-to-use wrapper around the Arduino_FreeRTOS_Library.Geekble_LieDetector :
Library for Geekble LieDetectorGeekble_Oscillator :
Generate pulse from 31.25KHz to 8MHzGrove - RTC DS1307 :
Arduino library to control Grove - RTC DS1307.GyverBeeper :
Async tone generator with amount and time settingsGyverBlinker :
Async LED blinker and task count timerGyverNTP :
Library for async receiving precise time from NTP serverGyverOS :
Simple task manager for ArduinoGyverTimer :
Simple timer with period/timeout modes on millisGyverTimers :
Library for control hardware timers on ATmega328p and ATmega2560HaCTimers :
An event driven arduino Timer.HeliOS :
An open source, community delivered, embedded operating system project.IntervalCallback :
Library to call a callback repetively after a certain time.IntervalTimerEx :
IntervalTimerEx subclasses the Teensy IntervalTimer to allow for a variety of callable objects as timer callbacks.JC_Sunrise :
Arduino library to calculate sunrise and sunset times.jm_Scheduler :
A Cooperative Scheduler Library for Arduino.Jobber :
simulated Threading for Arduino & Co.ledflasher :
Responsively flash LEDsLedTask :
The Arduino library shows the power of non-preemptive multitasking.leOS :
Simple scheduler that run little tasks within IRSsleOS2 :
Simple scheduler based on watchdog that runs little tasks within IRSlooper :
Proto-scheduler based on the use of millis()M5_RTC_Module :
A library for using the RTC-Module from iotec for the M5-Stack.Max31328RTC :
Library for Max31328 Real Time Clock.MCP79412RTC :
Arduino library for the Microchip MCP79411/12 Real-Time Clock/Calendar.MicroBeaut :
MicroBeaut Standard Library for Arduino.MicroNMEA :
Compact Arduino library to parse NMEA sentences.MillisCounter :
Arduino library to count up and down time using the millis() function.MillisTimer :
A timer library for working with millis().<br />MillisTimerLib :
Library to use the Millis function as a task scheduler.MilliStopper :
Easy to use and lightweight stoppermsTask :
Use hardware Timer1 to run tasks in time presetMsTimer2 :
Run an interrupt function using Timer2muTimer :
Arduino library to easily use on/off delays and cycle timers with non-blocking functions.MyAlarm :
A library that manage alarms and timers based tasks.MyDelay :
Arduino library that provides a non-blocking repeating timer with callback functionality.NE555 :
Simulation of the function from a NE555 timer chip. ;)Neotimer :
"A powerful non-blocking timer"NGLedFlasher Library :
Arduino library for Flashing more then one LEDNoDelay :
Arduino library to make use of the Millis funtion for non Blocking Delays.NodeRedTime :
Fetch Unix Epoch timestamp from Node-Red flow.NTimer :
Narwhalsss360 NTimer library for timed events, and Performance Timer.NTP :
NTP libraryNtpClientLib :
Ntp Client LibraryNTPtime :
NTPtime, UNIXtime and TimeFunc give you full control and more manipulation with time.Nusabot Simple Timer :
Simple library to launch timed actions.OneShot :
Generates an event that occurs only once at a specified interval.PagonGameDev GameLoop :
"Library for Creating Game with GameLoop"PCF8523 :
Arduino Library for PCF8523 Real-Time ClockPCF8563_RTC :
A library that interfaces with the PCF8563 RTC.PCF8583 :
PCF8583 Real Time Clock and Event Counter Library for ArduinoPollingTimer :
Arduino library to manage timing and event in a flexible way with pollingprecise_sntp :
This library is an implementation of the Simple Network Time Protocol (SNTPv4) for the arduino platform providing sub-second precision.ProcessScheduler :
An OOP multitasking libraryProfiler :
Easily profile your Arduino functions to see how much time they take. The output can be disabled and enabled at runtime. Very lightweight.ptScheduler :
Arduino timing library for writing non-blocking periodic tasks without using delay or millis routines.PWMFreak :
Configures the PWM frequency on a pinr4SwRTC :
A simple software RTC library for Arduino UNO R4.RBD_Timer :
Manage many timed events.ReefwingTimer :
A non blocking Scheduler based on millis().Rocket Scream RTCAVRZero :
Minimalistic RTC (Real Time Counter) implementation for MegaAVR 0-series MCU.roo_scheduler :
Allows scheduling delayed and/or repetitive tasks.roo_time :
Basic management of elapsed time, wall time, and date time, with multi-timezone support.RP2040_RTC :
This library enables you to use RTC from RP2040-based boards such as Nano_RP2040_Connect, RASPBERRY_PI_PICORT-Thread :
Real Time Operating System porting for Arduino SAM and SAMD boardsRTC :
Library for I2C based RTCs (DS1307, DS3231, PCF8563, PCF8523).RTC RV-3028-C7 Arduino Library :
A library to drive the RV-3028-C7 extremely precise, extremely low power, real-time clockRTC3231 :
A modified RTClib library to handle DS3231 RTC only.Rtc_Pcf8563 :
A library that interfaces the Phillips PCF8563 Real Time Clock chip.RTC_RX8025T :
Arduino library for the RX8025T real time clock (RTC)RTCCounter :
Provides use of the RTC peripheral in 32bit counter mode. For Arduino SAMD21 boards only.RTCDS1307 :
Library for rtc 1307RTCDue :
Use for the RTC inside the SAM3X8E from the Arduino DUERTClib :
A fork of Jeelab's fantastic RTC libraryRTCtime :
A "Standard C Runtime" compatible library for interfacing the DS1307 and DS3231 Real Time Clock modules.RTCTimer :
An Arduino library to easily perform scheduled tasks.RTCx :
Library to access DS1307, DS1337/8, MCP7941x and PCF85263 real-time clocks.RTL8720_RTC :
This library enables you to use RTC from RTL8720-based boards such as RTL8720DN, RTL8722DM, RTL8722CSM.RV-1805-C3 :
Library for Micro Crystal RV-1805-C3 extreme low power RTC module.RV-3028-C7 :
Library for Micro Crystal RV-3028-C7 extreme low power RTC module.RV3028 :
Basic library for the RV-3028-C7 RTCRV8803Tiny :
A library to drive the RV8803 extremely precise, extremely low power, real-time clock from new ATTINY series that run on MegaTinyCore.RX8025 :
Control RX8025 chip or the solar calendar to the lunar calendar.SandTimer :
Easy to use and lightweight timerSceneManager :
cooperative multi-scene manager for ArduinoSchedulerESP8266 :
A library to create timed schedules.ScheduleTable :
This library allows to schedule multiple actions along time.secTimer :
Simple seconds counterSeeed Arduino RTC :
RTC library for SAMD21 and SAMD51.SeqTimer :
Small piece of sequential Timer class (does not modify hw timers)simpleDSTadjust :
Automatic Daylight Saving Time adjust functionality for Arduino/ESP8266simpleEvents :
Implement simple event loops for micro-controllers using Arduino’s millis().SimpleTicker :
A library for creating Tickers, which will notify user that a given period has elapsed. Replaces delay() and allows users to write non-blocking code.SimpleTime :
SimpleTime functionality for ArduinoSimpleTimeout :
Minimal, production-ready timeout library for Arduino.Simpletimer :
this is simple class you can use to manage time and tasksSimpleTiming :
A library which helps you to write non-delaying timersSimplifiedTimer :
Simple arduino timer.SimplyAtomic :
A library for creating portable atomic blocks within your programslight_easing :
very simple easing functions.slight_Fade :
Timed value fading.SmallRTC :
Replacement RTC library for Watchy.Smart_Duty_Cycling :
Automatic duty cycle generation for your Arduino program.SoftTimer :
SoftTimer is a lightweight pseudo multitasking solution for Arduino.SoftTimers :
The SoftTimers arduino library is a collection of software timers. The library aims at greatly simplifying multitask complexity.SoftwareTimer :
Software timer librarysolar2lunar :
Arduino library for convert Gregorian calendar to Vietnamese lunar.Soldered PCF85063A RTC Library :
PCF85063A Board LibrarySparkFun Clock 5P49V60 Arduino Library :
Library that enables all functionality for the SparkFun Clock Generator 5P49V60.SparkFun Qwiic RTC RV1805 Arduino Library :
A library to drive the RV-1805 extremely precise, extremely low power, real-time clockspin-timer :
Universal Timer with 1 millisecond resolution, supporting OOP principles.SSVLongTime :
Singleton class to return uptime in seconds.SSVNTPCoreClass :
Singleton class to get real time over NTP. Based on esp8266 core function configTime(). Supports auto DST per time zone.SSVTimer :
One more non-blocking timer class based on millis() function.Stamp :
Library for time keeping and manipulationStensTimer :
An accessible Arduino timer library that enables you to use callbacks on class-instances as well as static callbacks (most commonly used).STM32duino FreeRTOS :
Real Time Operating System implemented for STM32STM32duino RTC :
Allows to use the RTC functionalities of STM32 based boards.STM32F1_RTC :
Allows to use the RTC functionalities of STM32F1xx based boards using external low speed oscillator.StopWatch_RT :
Arduino Library implementing a stopwatch.Strober :
Easy to use and lightweight led light pattern playerSuperTimers :
A Simple Timer Implementation that allows you to set a time and then check if the time has passed. You can set time in millis or minutes.Switch2_lib :
A clone of Switch_lib (O.Goma) library for switching digital pins with timers, adding millisecondsSwitch_lib :
A library for switching digital pins with timers, temporization and periodsTask by Makuna :
A library that makes creating complex mulitple task projects easy.Task Scheduler :
Lightweight and fast preemptive scheduler for ATMega and SAM3X Arduino Boards.Tasker :
Get rid of delay() calls, schedule tasks/functions instead.TaskJockey :
A simple, light-weight cooperative task manager for Arduino, ESP32, STM32, and similar systemsTaskManager :
cooperative multi-task manager for ArduinoTaskrunner :
Allows arduino to run scheduler which can run functions at specific frequencyTaskScheduler :
Cooperative multitasking for Arduino, ESPx, STM32 and other microcontrollers.TCone :
MicroBeaut-TCone Library with Timer and Counter One.TeensyTimerTool :
Generic Interface to Teensy TimersThreadedTimer :
A threaded timing library for mbed ArduinosTicker :
A library for creating Tickers which can call repeating functions. Replaces delay() with non-blocking functions.TickTwo :
A library for creating Tickers which can call repeating functions. Replaces delay() with non-blocking functions. Recommanded for ESP and Arduino boards with mbed behind.Time :
Timekeeping functionality for ArduinoTimeAlarms :
Perform tasks at specific times or after specific intervals.TimedState :
An Arduino Library providing utilities for controlling program state over time without delay().TimeInterrupt :
Allows for timer interrupts on various platforms.TimeOut :
An Arduino library that creates timer callbacks.TimeoutCallback :
Library to call a callback after a certain time.TimeProfiler :
Time profiler for ArduinoTimer :
A library for creating start / stop TimersTimerEvent :
TimerEvent is a non-blocking alternative to the delay() function.TimerFa :
Software TimerTimerFive :
Use hardware Timer5 for finer PWM control and/or running an periodic interrupt functionTimerFour :
Use hardware Timer4 for finer PWM control and/or running an periodic interrupt functionTimerFour32u4 :
Allow usage of the 10-bit hardware high speed Timer4 on ATMega16u4 and ATMega32u4.TimerMs :
Advanced software timer (based on millis())TimerOne :
Use hardware Timer1 for finer PWM control and/or running an periodic interrupt functionTimers :
LightWeight Timers librarytimersapi :
Library for timers, countdowns and counters.TimersOneForAll :
Make full use of all your hardware timers on your Arduino board. 充分利用你开发板上所有的硬件计时器TimerThree :
Use hardware Timer3 for finer PWM control and/or running an periodic interrupt functionTimezone :
Arduino library to facilitate time zone conversions and automatic daylight saving (summer) time adjustments.TinyRTCLib :
A tiny version of RTCLib, for use with TinyWireMtinyTimeR :
Easily implement timer interrupts.Tweakly :
A bizarre library, with the familiarity of Wiring and the power of real-time processes, advanced pin functions, and bouncing free.uClock :
BPM clock generator for Arduino platform.uICAL :
Library for parsing iCalendar file format.UniversalTimer :
Easy to use, multifunctional and non-blocking timer.UnixTime :
Unix time stamp to date time conversion and vice versaUptime :
Get the device uptime in years, months, days, hours, minutes, seconds, milliseconds, total days, and total seconds.Uptime Library :
Uptime library for Arduino boards and compatible systemsuTimerLib :
Tiny and cross-device compatible timer libraryuUnixDate :
Tiny and simplified library to convert to and from UNIX timestampsVariableTimedAction :
A library for creating timed events/actions.vn_lunar :
Arduino library for convert Gregorian calendar to Vietnamese lunar.WatchDog :
WatchDog Timer FunctionsWeeklyAlarm :
weekday timer ( thermostat like scheduler )wiring-timer :
Universal Timer with 1 millisecond resolution, based on system uptime (i.e. Arduino: millis() function or STM32: HAL_GetTick() function), supporting OOP principles.Yet Another Arduino Debounce Library :
An asynchronous Arduino Library for debouncingZeroTC45 :
Allows use of the ARM Cortex-M0 TC4 and TC5 counters for periodic interrupts.