Using millisDelay

Projects Programming
1

I’m trying to use the millisDelay feature to generate programmed delays but I get compiler errors. I am using the published example from Arduino as my test on the Arduino NANO board.

#include "millisDelay.h" 
int led = 13;
millisDelay ledDelay;

void setup() {
  pinMode(led, OUTPUT);   // initialize the digital pin as an output.
  digitalWrite(led, HIGH); // turn led on 

  ledDelay.start(10000);  // start a 10sec delay
}

void loop() {
  // check if delay has timed out
  if (ledDelay.justFinished()) {
    digitalWrite(led, LOW); // turn led off
    Serial.println("Turned LED Off");
  }
//  Other loop code here . . .
  Serial.println("Run Other Code");
}

I get the following errors among others:
undefined reference to millisDelay::millisDelay()' In function setup':
Time_Test/Time_Test.ino:9: undefined reference to `millisDelay::start(unsigned long)'

2

Please post the full error message copied from the IDE, using code tags when you post it

3

Then I'd say you didn't install the library properly.

The results here after installing millisDelay and compiling your sketch:

arduino-cli compile -b arduino:avr:nano:cpu=atmega328 --warnings all --output-dir ~/tmp --no-color (in directory: /home/me/Documents/sketchbook/Nano/test)
Sketch uses 1914 bytes (6%) of program storage space. Maximum is 30720 bytes.
Global variables use 228 bytes (11%) of dynamic memory, leaving 1820 bytes for local variables. Maximum is 2048 bytes.
Used library Version Path
millisDelay  1.3     /home/me/Documents/sketchbook/libraries/millisDelay-master
Used platform Version Path
arduino:avr   1.8.3   /home/me/.arduino15/packages/arduino/hardware/avr/1.8.3
Compilation finished successfully.
4

Thanks for your follow up. I found that if I changed the #include "millisDelay.h" (local directory) to #include <millisDelay.h>, everything compiled correctly.
Thanks for the help.

5

What other files do you have in the folder where the sketch is located ?

1 Like
6

I only had millisDelay.h
Perhaps I needed to copy additional files into the local directory but I guess I didn't know which ones.

7

If you want to use a local copy of the library (why ?) then you need at least the .h and .cpp files

Unless you have a good reason to use a local copy then delete the .h file to avoid confusion and use the library installed in the libraries folder of your sketchbook as you are now

1 Like
8

Don't. Do. That.

Leave library files in their respective library directory.

9

I agree. It's a lesson I learned with this issue. Thanks again for your help.

10

This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.