Arduino auto start code at random

Projects Programming
1

Hi. I have a strange problem. I have 2 different arduino one arduino nano and uno. They have different code but both auto execute the code at random times without me pressing any button. In both arduino I have to press a button to start the code but is auto start. Why this is happening? Is this normal? Any advice?

2

(deleted)

3

sorry for that. here is my code. i have wire the button like in the image i have attach.

int button=2;                  // koumpi ekinisis
int previousPin = 3;          // proigoumeno koumpi mp3 player
int pausePin = 4;            // pouse tou mp3 player
int kefalia=10;             // kanonika 5 volt
int kefali=8;              // kefali me dc down
int kapnos = 9;           // kapnomixani

void setup(){
  pinMode(button, INPUT_PULLUP);
  pinMode(kefalia, OUTPUT);
  pinMode(kefali, OUTPUT);
  pinMode(previousPin, OUTPUT);
  pinMode(pausePin, OUTPUT);
  pinMode(kapnos, OUTPUT);
  digitalWrite(previousPin, HIGH);  //button mp3 player
  digitalWrite(pausePin, LOW);  // button mp3 player
  delay(100);
  digitalWrite(pausePin, HIGH);  //button mp3 player
  digitalWrite(kefalia, HIGH);  //kounima kefalion
  digitalWrite(kefali, HIGH);  //kounima kefali
  digitalWrite(kapnos, HIGH);  //kapnomixani

}

void loop(){

  if (digitalRead(button) == HIGH) {
    //Sound!
    digitalWrite(pausePin, HIGH);
    delay(100);
    digitalWrite(previousPin, LOW);
    delay(100);
        digitalWrite(previousPin,HIGH);
   
    //kounima kefalion
   digitalWrite(kefalia, LOW);
   digitalWrite(kefali, LOW);
   delay(200);
   digitalWrite(kapnos, LOW);
   delay(3000);
   digitalWrite(kapnos, HIGH);
   delay(3000);
   digitalWrite(kapnos, LOW);
   delay(12000);
   digitalWrite(kefalia, HIGH);
   digitalWrite(kefali, HIGH);
   delay(100);
   digitalWrite(kapnos, HIGH);
   delay(100);
   digitalWrite(previousPin, HIGH);
    delay(100);
    digitalWrite(pausePin, LOW);
    delay(100);
    digitalWrite(pausePin, HIGH);
    delay(1000);
   
     
     


  } 
  else {
    digitalWrite(kefalia, HIGH);
    digitalWrite(kefali, HIGH);
    digitalWrite(kapnos, HIGH);
   
  }
}

4

image (see the forum sticky threads to find out how this is done):

5

Your code puts button on pin 2. Your schematic shows pin 7.

6

(deleted)

7

aarg:
Your code puts button on pin 2. Your schematic shows pin 7.

The image is for reference only so you can see how I wired the button. I have connected to pin 2.

spycatcher2k:
With input pullup, you dont need a resistor. Just a connection to pin 2, other side of button to ground.
also if (digitalRead(button) == HIGH) should be if (digitalRead(button) == LOW) as the input is HIGH until the button is pressed.

So I need to remove the resistor and connect it directly to min 2 and gnd? Then change the code to “if (digitalRead(button) == LOW)“ ?

8

klemo4:
The image is for reference only so you can see how I wired the button. I have connected to pin 2.

I'm sorry, must have missed that in my crystal ball..

klemo4:
So I need to remove the resistor and connect it directly to min 2 and gnd? Then change the code to “if (digitalRead(button) == LOW)“ ?

Correct

9

TimMJN:
I'm sorry, must have missed that in my crystal ball..
Correct

Ok I will try it that way. Thanks for the help I appreciate it.

10

Thanks everyone it work now. I have let it idle for more than 12 hours and no more auto start.