The delayMicroseconds() function pauses the program for the amount of time (in microseconds) specified as a parameter. 5. The TB6600 Stepper Motor Driver is a high-performance and cost-effective driver for bipolar stepper motors. See also. Sorted by: 0. The goal of delayMicroseconds() is to have delays in the order of 0. The function of delay() is in both cases correct. 1 cm = 0,393701 in. The variable speed is VERY slow. Arduinoリファレンスの文章は Creative Commons Attribution-Share Alike 3. The pulse is between 1 ms (0°) over 1. Ideally, 500ns or less. The primary issue that I see is that your code doesn't match your wiring diagram. 1．ロードセル（SC133）とADコンバータ（HX711）の使い方を学習する. We need to provide the HC-SR04 with a fitting trigger signal. As of Arduino 0018, delayMicroseconds () no longer disables interrupts. In short each button is attached to analog pins (A0,A1,A2. 7 library, as found here. </p> </div> <div dir="auto"> <p dir="auto">Currently, the largest value. Wir können nicht garantieren, dass delayMicroseconds () genau für kürzere Verzögerungszeiten funktionieren. clock_gettime_ns () on Unix or Linux systems. This function works very accurately in the range 3 microseconds and up to 16383. You can find the other interface types here. . 5 microsecond wide pulse every 249 microseconds- any suggestions on a better way? here is whats running:With AccelStepper: Set the stepper to run at a specific speed in the correct direction, then in a loop calling stepper1. I just want it to run once and stop where I wrote "END". agdl closed this as completed on Jan 9, 2015. Pauses the program for the amount of time (in microseconds) specified as parameter. Also delayMicroseconds() is a possibility. ! Hey guys, My program for multiple Sonar sensors, is giving the next fault: 'SonarSensor' was not declared in this scope Does anyone. Note: This tutorial uses an Arduino UNO, but you can use any official Arduino. 22 Fixed incorrect definition of BCM2835_GPFEN0 which broke the ability to set falling edge events. When you do delay (1000) your Arduino stops on that line for 1 second. delayMicroseconds () deaktiviert ab Arduino 0018 keine Interrupts mehr. // defines pins numbers const int trigPin = 9; const int echoPin = 10; // defines variables long duration; int distance; // float distance ; void setup () { pinMode (trigPin, OUTPUT); // Sets the trigPin as an Output pinMode (echoPin, INPUT); // Sets the echoPin as an Input Serial. First sentence of page 16 indicates that this would cause the result to be put on the SPI bus delayMicroseconds(1); return_val = SPI. byte key = 0b101100001111; global, i. Re: ATTiny 85 timers,whats the best. 23 Added bcm2835_i2c_set_baudrate and bcm2835_i2c_read_register_rs. The rotation returns to normal. The Reason I am posting on here is to share this test. August 15, 2022. Sudut sensor < 15 derajat. 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. For reference I'm trying to imitate this project but from the codes he posted I can only get the. Serial object works much the same way as on a regular Arduino. Как то искал на Али что нибудь для ардуино за дёшево. 8. On the boards from the Arduino Portenta family this function has a resolution of one microsecond on all cores. 3V on 3. 3ms, so I changed the register setting for data rate and used delayMicroseconds () function instead of delay () for delay. We do this for 10 µs (microseconds). However, this crashes my ESP32 every time. groundFungus June 25, 2018, 12:32pm 3. I'm messing around with the following code: #define cyclespermicro 240 #define microcycles (n) (n*cyclespermicro) uint32_t startCounter, counter, cpu_cycles; int. Our current code is: int pot = 0; int relay = 3; int motorPin = 11; int val = 0;. IDE 1. 10 digitalWrite (13, LOW); 11 delayMicroseconds (1000-100); 12} This technique has the advantage that it can use any digital output pin. During this process, the HC-SR04 will measure the time that it took the ultrasound to return. delayMicroseconds()与delay()函数都可用于暂停程序运行。不同的是，delayMicroseconds()的参数单位是微秒（1毫秒＝1000微秒）。 语法. delayMicroseconds()内で、引数を左に2ビットシフトしているため、実質14ビットが有効なビット数となるからです。 また、引数のエラー処理をしていないことにも注意してください。 If you need to generate a 1-minute time delay with Arduino, you can still use the delay() function. 5hardwarearduinoavrootloadersoptibootMakefile. press Ctrl-T for autoformatting your code. 其实 delayMicroseconds 函数会判断传入时间如果小于100us就使用 delayMicrosecondsHard 占用式延时，否则会调用 nanosleep 函数。 如果我们想要精确延时，是可以使用 delayMicrosecondsHard 函数的，这个函数在. g. You can request the current time using millis (), for example, but the value returned by. micro: thời gian ở mức micro giây. The next step is to define the TB6560 to Arduino connections and the motor interface type. When a person’s hand comes below the sanitizer and obstructs the sensor line-of-sight, the Arduino board receives a. g. 3. It requires a constant stream of pulses at the right frequency for it to track what the angle should be. The SR04 sets the pin back to LOW. sleep () takes seconds as a parameter. Project description. delayMicroseconds(8000000) gives a strange result that isn't quite 1/8th of 8. The first style is better, IMHO. Microsecond delay within task. A better way: micros() and a C++ Class. ) The NewPing library has a built in 'Ping' function, along with distance conversion. On the boards from the Arduino Portenta family this function has a resolution of one microsecond on all cores. one problem i'm facing know is that whan the user changing the speed ,the motor stop and than apllied the speed ,and that can cuase a motor a fialure if the speed is very high. cpp","path":"PotentiometerControl. Notice that the function is only accurate for a few discrete frequencies. You need to allow it time to spin-up or by having longer delays initially. Assumes a 1, 8, 12, 16, 20 or 24 MHz clock. See also. I want to run a servo forwards and backwards on an ATtiny85. Stop thinking in microseconds, and think in "clock cycles" or "nanoseconds" instead. Sometimes i need a control at the very bottom of my current program, so I am constantly accidentally expanding the taskbar. We used the delay () function to add a delay in the code to see the output in the code. ) By using Timer1 library and attached code I have been able to run for specific time. delayMicroseconds(1); for under 3-4 uS. If you need multiple tasks to occur at the same time, you simply cannot use delay (). Then, if the motor vibrates or click, it may be one of these problems: You didn't connect the motor properly. 16 bits on the MSP430 ( max value 65536) 32 bits on the ARM cores. Inside this timer ISR you would reset/disable the timer, then process your delayed action and return. The same technique can be used with micros(). 今回はArduinoの速さについてです。目次は以下。 delay()じゃ遅すぎる tone()関数で周波数を測定 delaymicroseconds()関数の場合 まとめ delay()じゃ遅すぎる 手軽で使えるマイコン、Arduino。私も互換ボードを一枚持っております。 ELEGOO Arduino用 Nanoボード V3. 背景 loopでdelayMicroseconds関数を利用してパルスを作っていたところ、同時に別のタスクもさせたくなったので、loopの外部でパルスを作る方法を探してみました。 いくつか実現方法が分かったので、備忘録を兼ねて方法を共有します。 使ったもの. The motor interface type must be set to 1 when using a step and direction driver. Currently, the largest value that will produce an accurate delay is 16383. However, the practical implementation of. If you want to make your Arduino sleep for 1 minute, or for multiple minutes, then it’s quite easy. While these functions are easy, your program can not do other work during the delay. I did not find any resource mentioning. if you like what you see, a. 本Lessonの目標は以下です。. Pauses the program for the amount of time (in microseconds) specified as parameter. I even tried using delayMicroseconds() for all delays in the code, but got the same result: The ISR seemed to make the Arduino UNO (that's the board I'm using) ignore ALL delays in the code. Modul yang ada dipasaran yang sering digunakan untuk arduino yaitu tipe HC-SR04 (seperti gambar diatas). A distance sensor (HCSR04) is also connected to Arduino. paste clipboard into write-window of a posting. Project description. Which can be used to create a time base for various events in your applications (like LED blinking, short pulse generation, or whatever). Correct me if I am wrong and try modifying the code as per this logic. By setting appropriate logic levels to those pins we will set the motors to at least one of the five-step resolutions. The ultrasound will travel through air until it reaches an object, which will cause them to bounce back, and return to the sensor. */ void delayMicroseconds(unsigned int us) { // calling avrlib's delay_us() function with low values (e. The "delayMicroseconds()" function and the "digitalWrite()" function take up quite some clock-cycles themselves to complete. 현재, 정확한 delay를 만드는 가장 큰 값은 16383. A look at your code reveals: int trigPin = 6; int echoPin = 7; int trigPin = 8; int echoPin = 9; int trigPin = 10; int echoPin = 11; that you actually defined trigPin and echoPin three times! Later you use trigPin1, trigPin2, trigPin3,. This function works very accurately in the range 3 microseconds and up. One is transmitter which outputs ultrasonic sound pulses and the other is receiver which listens for reflected waves. 0343 cm/μs = 1 / 0. 1. 8 ms with java. digitalWrite (greenLED,HIGH); // When the Red condition is met, the Green LED should turn off digitalWrite (redLED,LOW);digitalWrite(stpPin, HIGH); delayMicroseconds(10); digitalWrite(stpPin, LOW); delay(18000); and, to be honest, it will probably work perfectly well without the delayMicroseconds() line as the slow speed of the digitalWrite() function is normally sufficient to produce a wide enough pulse. . When combined with an Arduino UNO microcontroller, the A4988 can be used to control a. Timer. This function can be very useful when communicating with some hardware components. 示例程序In older versions delayMicroseconds() also disabled interrupts. 아두이노 0018 현재, delayMicroseconds () 는 더이상 인터럽트를 비활성화 하지 않는다. I have some code running as a FreeRTOS task on my ESP32. This special modulation pattern ensures that the frequency. This means that we can control the stepper motor with just 2 pins from our controller, or one for controlling the rotation direction and the other for controlling the steps. Is there a library function for the Keil Compiler for the Silabs EFM8 to provide a timer. The motor interface type must be set to 1 when using a step and direction driver. Currently, the largest value that will produce an accurate delay is 16383. 5 rev, or 2400 micro-steps etc. I like to keep my Taskbar collapsed on my laptop for longer time. The delay time should be around 1. 3. For the buzzer, it will stop buzzing after approx 5 seconds. Pauses the program for the amount of time (in microseconds) specified as parameter. 3. getCycleCount () function and interrupts for the timing. Print out the file on clay based paper, then iron or laminate it on to your copper board. Currently, the largest value that will produce an accurate delay is 16383. Only logged in users can leave comments. 1ミリ秒以上. Notice also that the delay loop is done in inline assembly, in order to be independent of compiler optimizations. 4 CODE CREATED AND EDITED BY - AMEYA ANGADI 5 LAST EDITED ON - 02/05/2021 6 IF DISTANCE IS LESS THAN 20 CM. Code 1:delayMicroseconds() คำสั่ง delayMicroseconds( mu s) คำสั่งนี้ใช้ทำหน้าที หน่วงเวลา โดยจะมีหน่วยเป็น ไมโครวินาที mu s (Microsecond) ^{[2]}. คำสั่ง delayMicroseconds(us) คำสั่งนี้ใช้ทำหน้าที หน่วงเวลา โดยมีหน่วยเป็น uS (micro-Second) ซึ่งมีค่าการหน่วงเวลา เท่ากับ 1/1,000,000 วินาที จะหน่าง. The Driver provides five different step. Don't delay more than 500 µs or so, or you'll miss a timer overflow. Summary// Historical name compatibility #ifndef BCM2835_NO_DELAY_COMPATIBILITY #define delay(x) bcm2835_delay(x) #define delayMicroseconds(x) bcm2835_delayMicroseconds(x) #endif So i tried comenting this out and was able to compile without errors, but now, when i do lcdClear() from the lcd. Program: void f_Delay_Micro_Sec( unsigned int Delay) { unsigned long useconds, useconds_Dif; char. Pauses the program for the amount of time (in microseconds) specified as parameter. You can either decrease the delay time between each step or you can adjust the size of the step the motor takes. A better way: micros() and a C++ Class. Hey forum, i need your help! My Goal is to make my Ultrasonic distance sensor control my 6 LEDS for an art-installation, the intention is that the closer people come to the installation (the shorter the distance) the faster the LEDs should blink (so I use a shorter delay). There is a more important difference between the two functions other than the unit of time the accept as parameters the function delay () calculates time. 10. Prescaler divides the Timer clock further, by the value that you input in the prescaler. This time can then be used to determine the distance to. Can be used to light a LED at varying brightnesses or drive a motor at various speeds. I want to read analog signal via adc with sample rate about 48khz so when I read via adc and delay about 20us. g. Intensity of light (on LDR) ↓ - Resistance↑ - Voltage at analog pin↓ - Duty cycle (PWM)↑ - Brightness of Power LED. 説明. After creating a setup() function, which initializes and sets the initial values, the loop() function does precisely what its name suggests, and loops consecutively, allowing your program to change and respond. Step 1: Connection. If the pin has been configured as an OUTPUT with pinMode (), its voltage will be set to the corresponding value: 5V (or 3. The wait variable comes from a second order equation I derived from measuring the RPM with a Tachometer and tweaking the value. This could change in future Arduino releases. 3ms, so I changed the register setting for data rate and used delayMicroseconds () function instead of delay () for delay. 1K 208 148. Eight-bit interface using software time delays. One is used for micro second granularity (delayMicroseconds) and the other is used for milli second granularity (delay). This could change in future Arduino releases. Une liaison SPI (Serial Peripheral Interface défini par MOTOROLA) est un bus de données série. delayMicroseconds(ระยะเวลาที่ต้องการหน่วงมีหน่วยเป็นไมโครวินาที : µs หรือ 1/1000000 วินาที) เปิดตัวอย่างซอร์สโค้ด . 1 /* 2 SMART DUSTBIN 3 THIS IS A CODE FOR MAKING A SMART DUSTBIN WHICH OPENS AND CLOSES AUTOMATICALLY. Ex: delay(3 * 60 * 1000); will make the program sleep for 3 minutes. See the syntax, parameters, return value, example code and notes for this function. monotonic_ns () You might also try time. Description. delayMicroseconds関数 delayMicroseconds関数は指定した時間(μs)プログラムを止めます。 使用例 Arduino IDEで使用するdelay関数の使い方は以下の通りです。 試しにこのプログラムをArduino UNOで実行すると、13ピンのLEDが蛍の様に不規則に明るさが変化します。 In this setup, a motor is connected to the output pins of an L298n or L298d board, and the input pins of the board are connected to an Arduino's pin11 and pin 10. You can find the other interface types here. I am using an Arduino Nano, DRV8825 driver with a NEMA17 stepper, and 4 buttons to simulate ACS712 current sensors that will be used later. delay() uses the millis counts based on Timer0. Learn how to use the delayMicroseconds () function to pause the program for a certain number of microseconds in Arduino code. The board where delayMicroseconds() works correctly is a Black Pill. I just started using Arduino and so far I've used both delay () and delayMicroseconds (). This could change in future Arduino releases. Normally you should use digitalPinToInterrupt (pin) to translate the actual digital pin to the specific interrupt number. These functions rely on interrupts themself, so they won’t work while the processor handles your custom interrupt callback function. 3. We cannot assure that delayMicroseconds will perform precisely for smaller delay-times. This is usually an indication of missing (or extra) braces somewhere in the code. 2 - Album on Imgur. and echo pin to digital pin 9. If an object is 50 to 30 cm away, it will sound for 1 second and try to turn off the sound for 1 second, but I can't think of a way to implement this code. ザ・ delayMicroseconds () 関数は単一の整数（または数値）引数を受け入れます。. In this tutorial, we will learn how to control a standard servo motor, to go back and forth across 180 degrees, using a. delayMicroseconds(1000); digitalWrite(trig , LOW); duration = pulseIn(echo , HIGH); For calculation the duration with the help of pulseln() function. One way to initialize the measurement is using the micros function:HC-SR04 Hardware Overview. Except, that you need to be consistent in placing curly braces. Hàm delayMicroseconds () chấp nhận một đối số số nguyên (hoặc số). Have a look on alarm manufacturers websites and see if they say the alarm frequency, then replicate it using PWM this way you can even produce a LFO tone giving the effect of emergency services sirens. ี3. If the ISR is getting executed during your measurement, then the execution time of the ISR will. As you are writing a loop, which runs at maximum speed, you might encounter a high CPU-usage but this should be OK if it is only for a couple of milliseconds. BLOG_POST I highly Recommend reading my Blog Post above, there are graphs & Program & everything. Essa função funciona bastante precisamente para valores maiores que 3 microssegundos. HC-SR04 Echo to Arduino PIN 09. Super Contributor. Step 1. For example, consider we have to print some numbers on the serial monitor at a specific time interval. 3. We cannot assure that delayMicroseconds will perform precisely for smaller delay-times. Here is a picture of the arduino itself. "Well - as it turns out the reference from the Arduino website compiles just fine; int outPin = 8; // digital pin 8 void setup() { pinMode(outPin, OUTPUT); // sets the digital pin as output } void loop() { digitalWrite(outPin, HIGH); // sets the pin on delayMicroseconds(50); // pauses for 50 microseconds digitalWrite(outPin, LOW); //. 2 Answers. Learn how to use the delayMicroseconds () function to pause the program for a certain number of microseconds in Arduino code. 21 delayMicroseconds is now not susceptible to 32 bit timer overruns. It can pause with an accuracy of 0. Step 2: BUILDING:-. | Find, read. Writing programs is a bit more than entering a cheatcode to get access to platinum-level of a game. In addition, you have full control the duty cycle and frequency. Here’s the code steps = 400 for (int s = 0; s < steps; s++){ digitalWrite( STEP_PIN, HIGH); delayMicroseconds (375);. But it can only give you milliseconds delay, and that’s the goal for this tutorial. delayMicroseconds (ุ1000); // หน่วงเวลา 1000us 13 ให้อัพโหลดโค้ดตัวอย่างข้างบนลงบอร์ด Arduino คำสั่ง delayMicroseconds จะหน่วงเวลา 1000 us หรือ 1000/1,000,000 วินาที ค่าจะวิ่ง. , MS1, MS2 & MS3. Currently, the largest value that will produce an accurate delay is 16383. Watch your proposed delayMicroseconds(). clock_gettime_ns () on Unix or Linux systems. c. The first step in making your own Mini Arduino RADAR system is to connect the servo motor to the Arduino. The timer setup is documented in wiring. It works great with arduino with default setting of 128sps and 8ms delay. delayMicroseconds () deaktiviert ab Arduino 0018 keine Interrupts mehr. For ESP-IDF, you can use this:대신 delayMicroseconds() 함수를 사용하는 만큼 ISR 구문의 처리가 길어져 다른 인터럽트 (예를 들면 시리얼이라던지) 가 처리될 수 없기 때문에 좋지 않은 코드인 것은 마찬가지지만 우린 단지 LED 를 켜고 끌 뿐이니까. Even short delays may cause you to you miss incoming serial data (at 115200 baud you will get a new character every 87 µs). Serial communication that appears. Pauses the program for the amount of time (in microseconds) specified as parameter. Description. time. For this code. You're spending a LOT more time doing the digitalWrites (and returning from and returning to loop()) than. Note that it’s 72-1, because the prescaler will add 1 to any. Currently, the largest value that will produce an accurate delay is 16383. The wiring is the same from. Microstep Selection Pins: The A4988 driver has three-step resolution selector inputs, i. For a normal Arduino @16MHz only the following code will be compiled: /* Delay for the given number of microseconds. Open the attached file “RGB board” in Eagle. delay 가. civilian1: I want to create a high frequency (upto 80KHz) PWM signal for an induction heating application. Description. 5 ms for neutral position. Currently, the largest value that will produce an accurate delay is 16383. I need a micro second accuracy to properly control a stepper motor, and I came across inconsistent delays as the delay increases. Once you have it ironed on, place the copper board in an acid bath for 15 mins. As of Arduino 0018, delayMicroseconds () no longer disables interrupts. sketch_may02a:31:3: error: expected initializer before 'digitalWrite' digitalWrite(trigpin,LOW); ^ sketch_may02a:32:20: error: expected constructor, destructor, or type conversion before '(' token delayMicroseconds(10); ^ sketch_may02a:34:15: error: expected constructor, destructor, or type conversion before '(' token. As our code works now, we have full speed forward, and variable speed backwards. Diese Funktion arbeitet im Bereich von 3 Mikrosekunden und mehr sehr genau. If you use the auto indent feature. A partir da versão Arduino 0018, delayMicroseconds () não mais desativa interrupções. delay function does not return any. 이 함수는 3 마이크로 초 이상 범위에서 매우 정확하게 돌아간다. The A4988 driver is a versatile stepper driver for controlling stepper motors for various applications. 10000 usec and often used in the 0. Step 2. This could change in future Arduino releases. Serial communication that appears. Step 2: Servo to Arduino. The next step is to define the DRV8825 to Arduino connections and the motor interface type. For very precise delays, you can use delayMicroseconds (), up to 16383 us. 1 Answer. And, while it is not relevant to your question,. I tried using this code the original code was only supposed to work with 1 sensor I tried modifying it but nothing seems to work and it keeps buzzing and flickering light randomly. In general, interrupts need to be processed as fast as possible to allow other interrupts to fire. %% looping % desired time to wait dt_des = 0. There are a thousand microseconds in a millisecond, and a million. Plenz September 19, 2015, 9:45am 1. Retornos. How to use loop() Function with Arduino. Currently, the largest value that will produce an accurate delay is 16383. 1. 0:15. cpp","contentType":"file"},{"name. 背景 loopでdelayMicroseconds関数を利用してパルスを作っていたところ、同時に別のタスクもさせたくなったので、loopの外部でパルスを作る方法を探してみました。 いくつか実現方法が分かったので、備忘録を兼ねて方法を共有します。 使ったもの. Re: Delay microsecond support. May 13, 2021 at 13:59. The delay has to be configurable to sub microsecond resolution. And for this reason, the prescaler value is 72. All without using the delayMicroseconds() function. The same technique can be used with micros(). Ich habe folgendes Problem : Ich möchte einen Schrittmotor. #include <Timerone. For delays longer than a few thousand. Essa função funciona bastante precisamente para valores maiores que 3 microssegundos. My college saw the Microsoft internal discussion which said RP2 with Win10 can achieve about 25 microseconds. Even a simple loop causes it to crash: ELF file SHA256: 0000000000000000 Backtrace: 0x4008860c:0x3ffbf8f0 0x40088889:0x3ffbf910 0x401300bc. The first step is to include the library with #include . But if I use "delayMicroseconds", I can insert the interval value from serial monitor but it is not working. Looking at the implementation of micros() and delayMicroseconds(), it is clear they have too much overhead. 程序上是分别三. Download WinForms demo project. Description. asked Nov 13, 2017 at 9:53. SR04 emits a ping and changes the signal pin to HIGH. This block of code will be called every time I want to find the distance of one of the sensors. There are a thousand microseconds in a millisecond, and a million microseconds in a second. Another advantage of not using delay() or delayMicroseconds() is that with the technique in the tutorial your code will automatically start every sample after 200 µsecs regardless of how long the. La función delayMicroseconds() es una función incorporada en el IDE de Arduino que permite pausar temporalmente una acción durante un número específico de microsegundos. Ultrasonic Sensor Mounted to Modulus. Note: delayMicroseconds() is limited to 16383µs. Anyone know how to do that? /* ADS1256 CLK - pin 13 DIN - pin 11 (MOSI) DOUT - pin 12 (MISO) CS - pin 10 DRDY - pin 9 RESET- pin 8. LOW to remove the clock. A partir da versão Arduino 0018, delayMicroseconds () não mais desativa interrupções. Có một nghìn micro giây trong một phần nghìn giây và một triệu micro giây trong một giây. Thread. There is a more important difference between the two functions other than the unit of time the accept as parameters the function delay () calculates time using the time interript of the arduino. The "further period" was 30uS in the software //that this has been created from. For a more complete version that can handle various clock frequencies, see the delayMicroseconds() function from the Arduino AVR core. 5A current. 125); does exactly what it says. The stepper motors will need a different timing scheme. However, to answer your actual question, there is a more accurate alternative to delayMicroseconds (): the function _delay_us () from the AVR-libc is cycle-accurate and, for example. For ESP-IDF, you can use this:대신 delayMicroseconds() 함수를 사용하는 만큼 ISR 구문의 처리가 길어져 다른 인터럽트 (예를 들면 시리얼이라던지) 가 처리될 수 없기 때문에 좋지 않은 코드인 것은 마찬가지지만 우린 단지 LED 를. This. Thanks. you shouldn't usedelay()/delayMicroseconds(), because again they make use of interrupts but they are disabled from within an ISR. I have a small dilemma. delay () is a blocking function. ”を表示させてdelay()とdelayMicroseconds()の違いを体感できるようにしてみました。 1000msごとに”. Hallo Leute, ich bräuchte mal Eure Hilfe. 현재 정확한 지연을 얻을 수 있는 최대 값은 16383이며. When you read the datasheet of the HC-SR04 you will see that it needs a 10us trigger pulse. Try replacing the start of your code with this:1. This. 2. But I think my suggestion that we spend a few milliseconds doing a benchmark may be worth thinking about. h) will allow you to busy-wait for a. Learn more about Teams Check out the implementation of delayMicroseconds() /* Delay for the given number of microseconds. 9 Answers. PDF | Portable spectroscopic instruments are an interesting alternative for in-field and on-line measurements. This module is a little bit tricky in order to learn the way of working of pulseIn.