What is the difference between delay and Millis?

What is the difference between delay and Millis?

Delay () vs Millis () The first difference you can see is that millis() has no parameter but returns the amount of time that has passed; while the delay() will require the number of milliseconds we want to pause the program but will not return anything.

What is delay Arduino?

The way the Arduino delay() function works is pretty straight forward. When you do delay(1000) your Arduino stops on that line for 1 second. delay() is a blocking function. Blocking functions prevent a program from doing anything else until that particular task has completed.

What unit is delay in Arduino?

Arduino – delay () function This number represents the time (measured in milliseconds). The program should wait until moving on to the next line of code when it encounters this function.

How does Arduino delay work?

delay()

  1. Description. Pauses the program for the amount of time (in miliseconds) specified as parameter.
  2. Syntax. delay(ms)
  3. Parameters. ms: the number of milliseconds to pause (unsigned long)
  4. Returns. nothing.
  5. Example. int ledPin = 13; // LED connected to digital pin 13.
  6. Caveat.
  7. See also.

What does Millis () do?

The millis function returns the number of milliseconds that your Arduino board has been powered up. In other words, when you upload your sketch to your Arduino, as soon as the upload is complete, the clock starts. Millis returns the number of milliseconds that have passed since this upload was completed.

How does delay ( ) and delaymicroseconds ( ) function work?

The delayMicroseconds () function will provide accurate delays as may be needed for some types of applications (e.g. SofwareSerial bit banging) by disabling interrupts during its core delay code. Still, interrupts (e.g. timer overflow, serial, others) may execute before the delayMicroseconds function returns and thus upset precise timing.

Which is the highest number of delayroseconds I can use?

I.e. delayMicroseconds (490) = 999 Hz at the flow computer However, the highest number I can use with delayMicroseconds is 16383 which gives me a frequency of around 30 Hz, so no chance of getting the frequencies from 2 to 29 Hz.

What does delay and delaymicroseconds mean in Arduino IDE 0016?

In LiquidCrystal bundled with the Arduino IDE 0016, the functions “clear ()” and “home ()” use delayMicroseconds to pause for 2000 microseconds. Since interrupts are disabled for the duration of the delay, this will cause a loss of one timer overflow interrupt (delays in excess of 1024 microseconds) for every call to home and clear.

Which is better delay or delay on Arduino?

I.e: delay (200) = 2 Hz at the flow computer delay (5) = 100 Hz at flow computer delay (1) = 494 Hz at flow computer doesn’t work with delays <1 ms All good so far, using the delay command I can read frequencies up to 494 Hz, with the delay 1 microseconds.