begin(115200); delay(10); wifisecure. 4. Please someone explain or point some useful link where i can relate on how to include delay and while delay in progress I read sensor values and print them on serial or store in SD-card. Your code is not really doing what you want. so I used : delay (86400000) for 86 million and 400. Blocking functions prevent a program from doing anything else until that particular task has completed. This produces ~104us delay: digitalWrite (resetPin, LOW); _delay_us (100); digitalWrite (resetPin, HIGH); This produces ~4412us delay: digitalWrite (resetPin, LOW); delayMicroseconds (100. That is a waste of computing cycles! The problem with the delay () function is that it is " blocking . I have some code running as a FreeRTOS task on my ESP32. I have a library which has a function that calls delay, and this gives a compiler error: Arduino: 1. Pauses the program for the amount of time (in microseconds) specified as parameter. It seems like delay is getting in the way of what we need to do. This implies it takes 15. We also use third-party cookies that help us analyze and understand how you use this website. 024 milliseconds, then incrementing by 2 (rather than 1) every 41 or 42 ticks, to pull it back into synch; thus some millis () values are skipped. For example, if it's going from 40 to 50, it might do: 40-41-42-43-44-45-46--------47-48-49-50. The problem only happens if using util/delay. This. delay (1000); } Or you can look into the blink without delay example, and follow it like a religion. All without using the delay() function. I was fiddling with Teacup for a Teensy 3. us: the number of microseconds to pause. The delay () function allows you to pause the execution of your Arduino program for a specified period. See the output on Serial Monitor. Time taken for 0 to 255 count in TCNT0 register = 62us x 255 = 15. If not, there could be a replacement Delay (). The reason for using delayStart += DELAY_TIME; to reset the delay to run again, is it allows for the possibility that the millis()-delayStart may be > DELAY_TIME because the. h","path":"include/util/delay. Timer interrupts in Arduino pause the sequential execution of a program loop () function for a predefined number of seconds (timed intervals) to execute a different set of commands. Gives you a delay that is at least 450ns but is rounded up to the nearest F_CPU clock tick. The datasheet goes on to tell you what those mean: Bits 2:0 – CS02:0: Clock Select. After the set commands are executed, the program resumes again from the same position. 1 minute = 60 seconds. Yes you can write delay (25200000UL) and it will delay for 7 hours. " –The time module is not included by default, it must be imported into the program. For delays longer than a few thousand microseconds, you should use delay () instead. Pauses the program for the amount of time (in milliseconds) specified as. Take the number of minutes, multiply it by 60 to get the number of seconds, and then multiply it by 1000 to get the number of milliseconds. The reason is that the functions setup() and loop() are artificial constructs that make programming easier (sort of). However, in field tests, the arduino. You can use a buzzer whenever you want to make some noise. For that purpose, the method requires you to supply it with a whole number that specifies how many milliseconds the program should wait. Just Copy and Paste this code in Arduino IDE. the CPU must be active about 20% of the time) at 200ms delay (for reference, to rule out other effects), consumption is down to about 60uA. If the user requests a delay greater than the maximal possible one, _delay_us () will automatically call _delay_ms () instead. _delay_us(0. the value returned is"," * always a multiple of four). Serial Monitor is one of the tools in Arduino IDE. No entanto, certas coisas continuam a acontecer enquanto a função delay () está controlando o microcontrolador, porque a função delay não desativa. When you do delay (1000) your Arduino stops on that line for 1 second. Click Upload button on Arduino IDE to upload code to Arduino. Here’s a step-by-step guide to setting up a Timer Interrupt: Install the TimerOne library in your Arduino IDE. . It can't be interrupted. Instead use Timer1 or Timer2. Download SafeString from the Arduino Library manager or from it… The maximal possible delay is 768 us / F_CPU in MHz. Specially if we are talking about Arduino or similar embedded development platform like STM32 based. vTaskDelay () is better for long or imprecise delays, because it lets another task wake up and run while the first task is suspended. Arduino has a delay (ms) function to pause the program for a certain amount of time. Description. Arduino's delay/tick functions do it. Mô tả chức năng. Bring us your Arduino questions or help answer something you might know! 😉. ) to perform the delay. It allows us to program using different threads at the same time and is. #include <PinFlasher. The code. Send. The Serial. Programadores mais habilidosos usualmente evitam o uso da função delay () para timing de eventos mais longos que dezenas de milissegundos, a menos que o sketch Arduino seja muito simples. 5us or 500nsInterrupt Latency is defined to be the time between the actual interrupt request ( IRQ) signal and the CPU starting to execute the first instruction of the ( ISR) interrupt handler function. The board is an Arduino Mega 2560 Rev3. I needed to #include "nrf_delay. The code: #include. Say you have a button you wanna check for during a delay. first a bit of the kit. It turns the LED on and then makes note of the time. 좀더 똑똑한 프로그래머는 delay () 를 10 밀리초보다 긴 타이밍 이벤트를 아두이노 스케치가 아주 간단한 경우가 아니면 대개 사용하지 않는다. Ciertas cosas no funcionan mientras que la función delay () está controlando el chip ATmega, debido a que la función delay () no deshabilita las interrupciones. Part 1 helps us understand what the millis () function does, and part 2 discusses tight loops and blocking code. More knowledgeable programmers usually avoid the use of delay () for timing of events longer than 10’s of milliseconds unless the Arduino sketch is very simple. t0delayus() is built up from timer0 delays. Erfahrene Programmierer vermeiden normalerweise die Verwendung von delay () für das Timing von Ereignissen, die länger als 10 Millisekunden sind, es sei denn, der Arduino-Sketch ist sehr einfach. In my FreeRTOS project, I am using another timer, namely TIM1, therefore using HALDelay() doesn’t give me correct behaviour. 1. 0 (ARM cortex-m4, mk20dx128) and noticed that for Teacup, delay(n) means a delay of n microseconds rather than milliseconds: [github. The millis () function is nothing like delay (). Once downloaded, start the Arduino IDE then go to Sketch > Include Library > Add Zip Library. Pls help me out. Whenever Timer1 fires, the interrupt service routine (ISR) isrBlinker () is called. If you need better resolution, micros () may be the way to go. Author: Michael Contreras. Currently, the largest value that will produce an accurate delay is 16383. from change log for Arduino 1. – Duncan C. If the avr-gcc toolchain has __builtin_avr_delay_cycles() support, maximal possible delay is 4294967. Serial communication that appears. Arduino - delay () function. Timing. Bring us your Arduino questions or help answer something you might know! 😉 Members Online • iamfyrus7 . 4 times faster than normal. i. h」というファイルの中で宣言されている関数です。実際に使う場合は「ets_sys. Arduino cuenta con un conjunto básico de funciones para el manejo de tiempo, y estas son: millis, micros, delay y delayMicroseconds. This function works very accurately in the range 3 microseconds and up. vn được xây dựng trên nền tảng Drupal 7, phiên bản hiện tại 2. (The biggest number you can represent as a 16-bit signed integer is 32767. This could change in future Arduino releases. However, SPIMemory says it supports the Nano 33 BLE. Description. But it can only give you milliseconds delay, and that’s the goal for this tutorial. 2; 1. Fundamentally, the Arduino core version of delayMicroseconds does the same thing as avr-gcc's _delay_us, which is a cycle-counting busy loop. One thing I discovered is if I'm using ruduino::delay::delay(n);, while n is some huge number like a 1000000, then it's blinking slower (3-4 times per second). From simple blinking LEDs to complex robotic systems, Arduino provides a versatile environment for enthusiasts and professionals to bring their ideas to life. This routine is called every time the timer interrupt occurs. If you need multiple tasks to occur at the same time, you simply cannot use delay (). On Arduino Code: any value, done by coding. The first thing you will discover is that some of those sketches that ran perfectly by themselves, just don’t play well with others. I get issues when I use "long" delays. Here's my code: uint16_t delayTime = 1000; uint64_t time; void setup(){ } void loop() { while (millis(). Coding Badly and I were working on a sketch way back when that would allow one to. This Arduino delay gotcha is fairly subtle and you may have already come across it. 9ns. This tutorial is a simple sketch and circuit to show how this is done. Arduino millis () Function. Arduino Relay Timer Program Code. i. An exact 100ns delay is not going to. De hecho, es un retardo que detiene la operación del programa por el número de milisegundos especificado entre paréntesis. delayMicroseconds (0) appears to malfunction and return (delay really) a much larger value, instead of returning asap. delayMicroseconds(us) Parameters. I would like to toggle an output pin in the order of microseconds so use the function delayMicroseconds. h and comment out this #include or is there something else I can do?. Last week, my esteemed colleague MTaylor explored a solution to scheduling periodic tasks on Arduino. There are a thousand microseconds in a millisecond, and a million microseconds in a second. */ void delayMicroseconds (unsigned int us) {// call = 4 cycles + 2 to 4 cycles to init us(2 for constant delay, 4 for variable) // calling avrlib's delay_us() function with low values (e. Certain things do go on while the delay () function is controlling the Atmega chip however, because the delay function does not disable interrupts. cpp: In function 'void. A simple software sketch is provided for interfacing an ATtiny85 to the C005. You need to refactor your code as others have suggested. To be honest, Arduino is not the best template for professional SW development, to say the least. e. Quick Steps. It generates a delay of 10us for each count. 75 us low time with my scope. Arduino nano 33 ble sense custom game controller by using Onboard LSM9FS1 Sensor20th Dec 2021 update: added PinFlasher class and example (included in SafeString library V4. From the arduino reference page for delay the parameter for delay is an unsigned long. Syntax. With the 1000ms delay that we have imposed with the delay () function, the Arduino is actually forced to do nothing (other than counting milliseconds) twice, in a single loop. Using delay () or other things that take time, you allow for more data to arrive before you try to read it. but also not absolutely terrible for my needs. The problem only happens if using util/delay. When i upload my Arduino kit and turn on Serial plotter, the potentiometer's graph is working but the delayed graph is not working. Currently, the largest value that will produce an accurate delay is 16383. h" and click "OK" button. Using Arduino. Discover how to avoid using the delay() function in your Arduino programs. 6 IMU sensor using I2Carduino-timer. Hi, I'm using Arduino IDE 1. 改善すべき部分がありますか？ GitHubを通じて，訂正や新しいドキュメントの提案をお願いします. I need help adding a delay. 7 hours = 1000 * 60 * 60 * 7 = 25,200,000. The delay () function allows you to pause the execution of your Arduino program for a specified period. {"payload":{"allShortcutsEnabled":false,"fileTree":{"cores/arduino":{"items":[{"name":"Arduino. Use stopwatch_delay(4) below to accomplish approximately 24ns of delay. If the user requests a delay greater than the maximal possible one, _delay_us() will automatically call _delay_ms() instead. (digits, a,b,c,d) setCircle(); calls a subroutine to advance the position of a lit LED in a circle of 20. _delay_us() should be accurate to a microsecond. el_supremo March 6, 2013, 4:43pm 2. And have the drawn circuit close by for direct reference while building. When used in simple sketches, you might not notice a difference when using the delay () function. The. h and the _delay_ms (), _delay_us () functions. The maximal possible delay is 768 us / F_CPU in MHz. Arduino delayMicroseconds function - The delayMicroseconds() function accepts a single integer (or number) argument. However, this crashes my ESP32 every time. I chose the ESP32 because of its 240MHz clock, but it still seems to be having trouble. Sintaxis. Take the number of minutes, multiply it by 60 to get the number of seconds, and. You should use it if you are using arduino, and also you should post in the arduino forum. Data Types. delay ()関数を使ってLEDを点滅させることは簡単だし、多くのスケッチではスイッチのチャタリングを防止するために少しの遅延を利用しているが、スケッチ でdelay ()を利用することには重大な欠点がある。. The real time clock method is the most accurate way but otherwise use millis. delay (1) = 494 Hz at flow computer. There are a thousand microseconds in a millisecond and a million microseconds in a second. 1 on windows 10 and I'm getting something very strange. The maximal possible delay is 768 us / F_CPU in MHz. The value passed to delay is an unsigned long integer. In this tutorial, I’ll show you a couple of methods to implement STM32 delay functions both in microseconds and milliseconds. void DELAY_us(uint16_t us_count) Input Arguments : uint16_t: Count to generate the required delay in us Return Value: none Description : This function is used generate delay in us. These functions rely on interrupts themself, so they won’t work while the processor handles your custom interrupt callback function. No entanto, certas coisas continuam a acontecer enquanto a função delay () está controlando o microcontrolador, porque a função delay não desativa. It basically sets up a tight loop with exact parameters and puts it inline. 125 µs I subtracted is the time needed by the actual port writes: both the sbi and cbi instructions take two cycles (0. Thus, with different delays, both LEDs will blink at different rates. 4” LCD Screen, IMU and more practical add-ons housed in a compact enclosure with built-in magnets & mounting holes. delayMicroseconds(us) pauses for a given number of microseconds. Hi All, I'm trying to have a relay activated when an input goes low, then stay activated for a time after the input goes high again. Description. Hence the Load connected to the relay will remain OFF. Please help it. There is only one person on this forum that thinks using delay () is a good idea, with serial communications. delay, but without delay. com] Since that's opposite of the usage in the Arduino world, might it be nice to make it delay_us() or delay_us_wdt() to hiThe Arduino delayMicroseconds () function is a built-in function that pauses the CPU for a short time interval (in µs). The ROM function ets_delay_us() (defined in rom/ets_sys. The detail instruction, code, wiring diagram, video tutorial, line-by-line code explanation are provided to help you quickly get started with Arduino. wildbill May 21, 2014, 1:04pm 12. However Delaymicroseconds() does not use the time interrupt As you may know once an interrupt. Returns . I have a feeling the datatype associated with "delay" may be integer or. Then later in the delaymicrosecond() the bit shifts for the "us" variable. 4. I programmed an Arduino Uno R3 to trigger a relay once every 24 hours from the moment it is powered on. As short reply and a general note, there is the millis () function that will be faster than a delay (). If you are using a different board, try building the documentation locally with. I know that's probably not possible but ideally I'd like a delay as small as possible without having no delay. The Arduino programming language Reference, organized into Functions, Variable and Constant, and. Hi, I am trying to measure a time of 1us. If you want to make your Arduino sleep for 1 minute, or for multiple minutes, then it’s quite easy. The ATmega328 built on the Arduino Uno has a total of 3 timers available, which are: Timer0 — An 8 bit timer used by Arduino functions delay(), millis() and micros(). . Copy the above code and open with Arduino IDE. delay ()関数を使っている間は、センサーから値を. Assumes a 1, 8, 12, 16, 20 or 24 MHz clock. Pauses the program for the amount of time (in microseconds) specified by the parameter. I'm sure it's something obvious but I'm blind to it. The _delay_us() function from avr-libc is actually cycle-accurate inline assembly. Hello, My question is about implementing the functionality of HALDelay(), which is implemented based on the SysTick timer tick count. Arduino Timers. Arduino Code for Power-Down Periodic Mode: LowPower. timer overflow, serial, others) may execute before the delayMicroseconds function returns and thus upset precise timing. An. The delay () function will make the Arduino stop until your specified interval has expired. Intro. Topics in this lesson. Meaning Arduino moves from one instruction to another instruction for every 62 nano second. There are a thousand microseconds in a millisecond, and a million microseconds in a second. 0. So you make a for loop that checks for input and delays 1 ms. You can easily find or write a piece of code that delays for 12500 nanoseconds (+/-62. 1 sec for human factors - input response timing delay(100); //wait 100 msec before restarting loop. Duemilanove and Nano), this function has a resolution of four microseconds (i. If you want to make your Arduino sleep for 1 minute, or for multiple minutes, then it’s quite easy. Learn delay() example code, reference, definition. Connect OUT to digital pin 2 on Arduino board. The code I tried is as follows. Pauses the program for the amount of time (in microseconds) specified as parameter. No entanto, certas coisas continuam a acontecer enquanto a função delay () está controlando o microcontrolador, porque a função delay não desativa. delayMicroseconds (0) delays far longer than expected. Delay is very important function in any embedded system application. Which can be used to create a time base for various events in your applications (like LED blinking or whatever). (When i try to make use of SysTickHandler compiler says that is already used. This is done by creating a noDealy object and setting the amount of time for the delay you want. Delay () blocks the complete processor. Bring us. //delay_us(us); // for the 16 MHz clock on most. Timing and delays¶. Learning how to use millis instead of delay is a key principle for learning the Arduino platform. At default clock (125MHz) this should give 8ns per cycle resolution although in reality there is some overhead. oled. Full tutorial can be found here: How to use millis () function to multitask in arduino code. It helps us time events without pausing the code. but util/delay. g. If you omit Step-4, you will not see that the LED is OFF though there is a code in Step-3 to turn OFF the LED. Sintaxe. h". 그러나, 어떤 것은 delay () 함수가 Atmega 칩을 제어하는 동안에도 이루어지는데, 왜냐면 delay 함수가 인터럽트를 비활성화. For ESP-IDF, you can use this:Things to Avoid in Programs with Interrupts (The Don’ts) Do not use delay (), millis (), or micros () inside of an ISR. Contohnya, saat kita ingin menghidupkan LED pada Arduino selama 3 detik, kita dapat menggunakan fungsi delay(3000). Pauses the program for the amount of time (in milliseconds) specified as parameter. The Arduino millis () is a timer-based function that returns to you the time elapsed (in milliseconds) since the Arduino board was powered up. 4. There is no util/delay. Assumes a 8 or 16 MHz clock. Then in the loop we’re going to use the Serial. Software Serial is an infamous offender. h is an AVR thing. millis () will wrap around to 0 after about 49 days (micros. 25 and 0. delay() is just a simple "spin for X loops" function. */ void delayMicroseconds(unsigned int us) { // calling avrlib's delay_us() function with low values (e. Thank you. You need a global boolean flag to indicate that the delay is active. There are a thousand microseconds in a millisecond, and a million microseconds in a second. We can also use the power-down mode with an interrupt, where the. Us resolution. 22 rate is 5. For a normal Arduino @16MHz only the following code will be compiled: /* Delay for the given number of microseconds. It is all to do with scoping ( C/C++ rules of when a variable is visible to other functions) and how the Arduino environment (although convenient) does hide what is going on behind the scenes - and this can catch you out. This means that only items which are available for this board are visible. 1) t1 is running and increments the integer in the first row every second. For delays longer than a few thousand microseconds, you should use delay () instead. 2 (latest) 1. delay () will stop every other code from execution. Using Arduino Programming Questions. Description. There are a thousand microseconds in a millisecond, and a million microseconds in a second. Then I found out time delay function delays 6. 2. Describe the issue Since Release 10. 1; 1. This is part 2 of our millis() function mini-series. . You can delay that small by doing something like. It keeps track of the elapsed time since the start of the delay or cycle and is non-blocking. Programming Questions. But if you're trying to bitbang a signal with 1 µs accuracy, you'll probably have to write a tight assembler loop. El delay Arduino es el comando más fácil y el más utilizado por los principiantes. Wahyu Nuswantoro Aji October 24, 2019 - December 20, 2022 Coding Timers and Delays in Arduino: 20th Dec 2021 update: added PinFlasher class and example (included in SafeString library V4. Arduino Delay Gotchas. The three Clock Select bits select the clock source to be used by the Timer/Counter. Start the delay: 1 ) set the timestamp to the millis : previousMillis = millis () ; 2 ) set the boolean flag : delayActive = true; Check the delay in the loop:Description. 134 delays up to 6. This tutorial teaches you to control LED using Arduino UNO or Genuino UNO. Both are not running when tried to run the basic example of yield function available at arduino forum. agdl closed this as completed on Jan 9, 2015. 1. Tight loops; Blocking code; Ancient recipe for inspiring music; Millis() versus Delay()2 us if taken, 1 us if it fails. My thought would be to store the event time along with the student data, then each time the system is executed, it checks the elapsed interval, and does the deed. You can adjust the sensor sensitivity and delay time via two variable resistors located at the bottom of the sensor board. Give file's name "pitches. No, these macros expand to calls to __builtin_avr_delay_cycles () , which are compiled into delay loops. Add delay in Arduino - In order to add time delays in Arduino, you can use the delay() function. //delay_us(us); // for the 16 MHz clock on most Arduino boards // for a one-microsecond delay, simply return. h","contentType":"file"},{"name. If the avr-gcc toolchain has __builtin_avr_delay_cycles() support, maximal possible delay is 4294967. 2) After 5. The below are some functions that you can use to display text on the OLED: oled. 3. . Certain things do go on while the delay () function is controlling the Atmega chip, however, because the delay function does not disable interrupts. Otherwise, the simple answer is: delay (1000); system May 21, 2014, 12:55pm 11. Assumes a 1, 8, 12, 16, 20 or 24 MHz clock. chifai November 24, 2016, 2:34am. 좀더 똑똑한 프로그래머는 delay() 를 10 밀리초보다 긴 타이밍 이벤트를 아두이노 스케치가 아주 간단한 경우가 아니면 대개 사용하지 않는다. This sketch demonstrates how to blink an LED without using. La comunicación serie que aparece en el pin RX se registra, PWM ( valores analogWrite) y los estados de los pines se mantienen, y las interrupciones funcionarán como es debido. I copy this somewhere, i add delay(100); to prevent miss click, can someone help me replace. This is especially true when you start using the Arduino delay function, which can causes issues very quickly. Interrupts are a common way to get things done while something else is going on. 1; 1. The way the delay () function works is pretty simple. We cannot assure that delayMicroseconds will perform precisely for smaller delay-times. delayMicroseconds(us) Parameters. What I am doing with this code: I send this chunk a few variables to control which LEDs are on and when. There are 1000 microseconds in a millisecond. For my project I need to measure time in nanosecond fineness. Managing time is a fundamental element of interactive computing. 1. What is Arduino delay(). Instruction Cycles DELAY : LDI COUNT, 0XFF 0 Again : NOP 1 NOP 1 NOP 1 DEC COUNT 1 BRNE AGAIN 2/1 RET 4 Solution : Time Delay = [1 + ( ( 1+ 1+ 1+ 1 + 2 ) x 255) + 4 ] x 0. delay(60000); // 1 minute = 60x1000 = 60,000 milliseconds. However the output signal read from the Arduino seems to be delayed. I am using LINX toolkit to program Arduino. Every now and again, it looks as though delay isn't working correctly. \$\begingroup\$ Yes, because delay_us calculates how many CPU cycles it needs for a certain delay (based on F_CPU), in order to delay for certain amount of cycles with the delay_cycles. Delay_ms function is normally abbreviated to. Can I go into SPIMemory. 5 in the calculation. In this way the LED blinks continuously while the sketch. This guide explains how to get the best out of this forum. Syntax. Using Arduino. But still it is bad practice to use delay (). There are a thousand microseconds in a millisecond and a million microseconds in a second. HazardsMind May 20, 2013, 4:33pm 3. Theoretically, no. This could change in future Arduino releases. int Green = 18; int Relay = 12; int Input = 4; int state = LOW; int val = 0. Everything seemed to be working well in my simulations, but whenever I built the circuit and looked at the timing on an oscilloscope all of my uS values seemed to be off. cmaglie removed the New label on Feb 27, 2014. Viewed 276 times. Timer1 — A 16 bit timer. Even a simple loop causes it to crash: ELF file SHA256: 0000000000000000 Backtrace: 0x4008860c:0x3ffbf8f0 0x40088889:0x3ffbf910 0x401300bc. By definition, the Arduino is as accurate as it's crystal clock/resonator. system June 21, 2012, 2:08pm 5. You can if you handle your button press in a pin change interrupt handler. When you use millis () to time events instead of delay (), your code keeps on looping and allows it. Larger values can produce an extremely short delay. 1 on windows 10 and I'm getting something very strange. At 16 MHz that's 16 counts (no prescaler) per µs, with an offset to correct for the delay between. 2 - 330-560 Ohm resistors, for LEDs. Syntax . Like this: // check to see if it's time to do something; that is, if the // difference. The delay () function will cause all code executing on the Arduino to come to a complete halt and it will stay halted until the delay function has completed its delay time. We’ll be using the DWT and STM32. Đây là trang thông tin phi lợi nhuận ra đời hướng tới cộng đồng trẻ, những chủ nhân tương lai của đất nước. However, be aware that micros. Example-2 : Find the delay in us of the code snippet below if the crystal frequency is 10 MHz. I suppose your code should exit after 10 seconds or if button is pressed. When you enable interrupts on a timer, you need to make sure there is sufficient time between interrupts to actually process them. However, every now and then the Timer 0 interrupt (the one responsible for updating the millis() counter) will delay your interrupts for a few microseconds. The processor sits in a loop until that amount of time has gone past. ・マルチタスク中でμs単位でdelayをかける関数 結論から言うと、以下の関数でできます。 ets_delay_us(9); // 9μsだけdelay Arduino IDEでESP32を使えるようにした時に入れたツールの「ets_sys. Certain things do go on while the delay () function is controlling the Atmega chip however, because the delay function does not disable interrupts. For delays longer than a few thousand microseconds, you should use delay() instead. e. So is timer 2 responsible for the delay() and delaymicroseconds() on mega? I did not find any resource mentioning.