https://ctc101.arduino.cc/resources?id=32379590
me is not declared
What do I need to do to declare me? The code is not working.
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/*
- VU-Meter
- VU-Meter is a few LEDs grouped together into a line.
- This library has some features that makes it easy to control
- several LEDs. Functions to use are:
-
clear() - turns all LEDs off. -
on(LEDindex) - turns one LED on -
off(LEDindex) - turns one LED off -
scrollRight(speed, startIndex) - one LED light up at a time from left to right -
scrollLeft(speed, startIndex) - one LED light up at a time from right to left -
blink(LEDindex,speed, times) - one LED blinks -
blinkAll(speed, times) - all LEDs blink -
fillFrom(startIndex, stopIndex) - turns LEDs from startIndex to stopIndex on -
fill(numberOfLEDs) - turns LEDs on from first to numberOfLEDs - (c) 2013-2016 Arduino LLC.
*/
#include <educationshield.h>
//Declare the VUMeter
VUMeter me;
//The pins used by the VUMeter, default to 2-5 and 7. Can be
//customized as wish, but do change the pinCount if the
//number of LEDs are changed.
int pins[]={2,3,4,5,7};
//How many pins are used. Should reflect the pins array above.
int pinCount=5;
void setup(){
//Configure the VU meter using parameters defined previously.
me.config(pinCount,pins);
//initialize the component. Must be called.
me.begin();
}
void loop(){
//fill(number)
// number: how many leds from first pin shall be turned on
//
//Fill 5 LEDs
me.fill(5);
delay(3000);
//clear()
//
//turn all the LEDs off
me.clear();
delay(1000);
//on(index)
// index: which LED being turned on
//
//Turn the 3rd LED on
me.on(2);
delay(1000);
//off(index)
// index: which LED being turned off
//
//Turn the 3rd LED off
me.off(2);
delay(1000);
//scrollRight(speed, startIndex)
// speed: milliseconds before the next LED turns on
// startIndex: from which LED to the left it start
// scrolling. If not specified, it's 1.
//
//One LED light up at a time, scroll from left to right
me.scrollRight(700);
//scrollLeft(speed, startIndex)
// speed: milliseconds before the next LED turns on
// startIndex: from which LED TO THE RIGHT it start
// scrolling. If not specified, it's 1.
//
//And then scroll back from the 2nd on the right
me.scrollLeft(700,1);
//blink(index, speed, times)
// index: which LED should blink
// speed: milliseconds, of which the LED light on and off
// times: how many times the LED blinks. Defaults to 1
//
//the 3rd led will be blinking for 10 times, each time
//with 100 milliseconds on and 100 milliseconds off
me.blink(2,100,10);
//blinkAll(speed, times)
// speed: milliseconds, of which all LEDs light on and off
// times: how many times the LED blinks. Defaults to 1
//
//All LEDs will be blinking 10 times
me.blinkAll(100,10);
//fillFrom(leftIndex,rightIndex)
// leftIndex: start filling from which LED
// rightIndex: end filling to which LED
//
//The 2nd to 4th LED will be light up
me.fillFrom(1,3);
delay(2000);
}</educationshield.h>
I did mention the code tags! Please follow the program and add them! I did forget to ask for the complete compile error listing, a 3 word quotation is not enough.
It says: 'VUMeter' does not name a type
Please read. I asked for the complete compiler error listing and code tags.
Arduino: 1.8.19 (Windows Store 1.8.57.0) (Windows 10), Board: "Arduino Uno"
sketch_feb14a:21:10: fatal error: educationshield.h: No such file or directory
#include <educationshield.h>
^~~~~~~~~~~~~~~~~~~
compilation terminated.
exit status 1
educationshield.h: No such file or directory
This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.
//When I delete educationshield.h, it says:
Arduino: 1.8.19 (Windows Store 1.8.57.0) (Windows 10), Board: "Arduino Uno"
sketch_feb14a:24:1: error: 'VUMeter' does not name a type
VUMeter me;
^~~~~~~
C:\Users\kristen_roecker1\Documents\Arduino\sketch_feb14a\sketch_feb14a.ino: In function 'void setup()':
sketch_feb14a:36:3: error: 'me' was not declared in this scope
me.config(pinCount,pins);
^~
C:\Users\kristen_roecker1\Documents\Arduino\sketch_feb14a\sketch_feb14a.ino: In function 'void loop()':
sketch_feb14a:47:3: error: 'me' was not declared in this scope
me.fill(5);
^~
C:\Users\kristen_roecker1\Documents\Arduino\sketch_feb14a\sketch_feb14a.ino: At global scope:
sketch_feb14a:110:2: error: expected unqualified-id before '<' token
}</educationshield.h>
^
exit status 1
'VUMeter' does not name a type
This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.
That's telling you that you are missing that library.
Crucial it is.
https://github.com/arduino-libraries/EducationShield/
Why do I need the library? Why can't I just run the code? How do I connect my code to the library? Why isn't this explained in CTC 101? What do I need to do?
Looks like the code is not running without
Because the library is needed
It is already is "connected" by #include <educationshield.h>
Ask the author of CTC101, or just skip that question.
Ask more meaningful questions; and read the answers of the others carefully.
Download the library from the link provided or use the arduino library manager and search for it (educationshield .h)
post edit --
adding pic
I think there is a "getting started with Arduino" on this site, it answers a lot of your questions.
There certainly is an explanation of how to ask questions! 
A library is pre-written code so you don't have to write everything yourself or you don't have to write (or copy) the same code over-and-over. (It makes your code "look simpler".)
I don't know anything about that library but if you were making a VU meter library you might want to make a function that calculates dB and you could put that function in a library. Of course, when you call that function you program would need access to that library.
Thank you!
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