"not declared in this scope"

Projects Programming
1

So, I am working on an LED project for a friend. I have a 6 position switch that is going to control the led "flash" patters. (Just explaining the gaggle of as-of-yet useless code in the beginning.

void setup() {
  // Begin setting Digital pinModes
  pinMode(0, INPUT);
  pinMode(1, INPUT);
  pinMode(2, INPUT);
  pinMode(3, OUTPUT);
  pinMode(4, INPUT);
  pinMode(5, OUTPUT);
  pinMode(6, OUTPUT);
  pinMode(7, OUTPUT);
  pinMode(8, OUTPUT);
  pinMode(9, OUTPUT);
  pinMode(10, OUTPUT);
  pinMode(11, OUTPUT);
  pinMode(12, INPUT);
  pinMode(13, INPUT);
  // Set analog ins
  int leftPot = analogRead(A0);
  int rightPot = analogRead(A1);
  int speaker = analogRead(A2);
  //Name LED Pins
  int led1 = 3;
  int led2 = 5;
  int led3 = 6;
  int led4 = 7;
  int led5 = 8;
  int led6 = 9;
  int led7 = 10;
  int led8 = 11;
  
  
}
void loop() {
  digitalWrite(led1, HIGH);
  delay(500);
  digitalWrite(led1, LOW);
  delay(500);
}

And I am getting this error:
Mega_Project.cpp: In function 'void loop()':
Mega_Project:33: error: 'led1' was not declared in this scope

Is there an issue with "int led1 = 3;"?

2

The only issue is that you put it inside setup() so only setup() knows about it. If you want it to be global you should move it outside the functions.

3

Wow. lol.. yep. That was the issue. Thank you very much.

4

hey, this what happen!
Arduino: 1.8.5 (Windows 10), Board: "Arduino/Genuino Uno"

C:\Users\sys\Documents\Arduino\sketch_oct25a\sketch_oct25a.ino: In function 'void setup()':

sketch_oct25a:8: error: 'LED1' was not declared in this scope

pinMode(LED1, OUTPUT);

^

sketch_oct25a:9: error: 'LED2' was not declared in this scope

pinMode(LED2, OUTPUT);

^

sketch_oct25a:10: error: 'LED3' was not declared in this scope

pinMode(LED3, OUTPUT);

^

C:\Users\sys\Documents\Arduino\sketch_oct25a\sketch_oct25a.ino: In function 'void loop()':

sketch_oct25a:17: error: 'LED1' was not declared in this scope

digitalWrite(LED1, HIGH); //turn on LED1

^

sketch_oct25a:21: error: 'LED2' was not declared in this scope

digitalWrite(LED2, HIGH);//turn on LED2

^

sketch_oct25a:25: error: 'LED3' was not declared in this scope

digitalWrite(LED3, HIGH);// turn on LED3

^

exit status 1
'LED1' was not declared in this scope

This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.

5

pinMode(LED1, OUTPUT);

int led1 = 3; // is in your posted sketch

"led1" and "LED1" are not the same.
Leo..