Remember when you said.. I checked all the wireing and it is ALL CORRECT? This is your learning mo

TTrueNorth Remember when you said.. I checked all the wireing and it is ALL CORRECT? This...

L

laith•10/28/25, 3:52 PM

ty :))) i was seeing the photo there is a samll dif

L

laith•10/28/25, 3:52 PM

rn what sould i do?

L

laith•10/28/25, 3:52 PM

try to remake it from my mind?

T

TrueNorthOP•10/28/25, 3:55 PM

If you think you got it that's fine move on if its working. Its just WE ALL have done this.. STILL do this. It will be a forever thing. So its good to get used to learning to spot it.

TTrueNorth If you think you got it that's fine move on if its working. Its just WE ALL have...

L

laith•10/28/25, 3:56 PM

i mean

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laith•10/28/25, 3:56 PM

i want to understand arduino

L

laith•10/28/25, 3:56 PM

with out copying

L

laith•10/28/25, 3:56 PM

should i try and make it again with out the book?

Llaith should i try and make it again with out the book?

T

Tuuli 🎹🎸🤘•10/28/25, 3:57 PM

Usually that helps you learn a lot.

T

Tuuli 🎹🎸🤘•10/28/25, 3:57 PM

Its using your recall memory, and you'll see where you got confused and can look more into those areas.

TTuuli 🎹🎸🤘Its using your recall memory, and you'll see where you got confused and can look...

L

laith•10/28/25, 3:57 PM

ok thanks !!!1

L

laith•10/28/25, 3:57 PM

i want to use and be good at it

L

laith•10/28/25, 3:57 PM

i love it

C

Camisado•10/28/25, 3:57 PM

HI hi

CCamisado HI hi

L

laith•10/28/25, 3:58 PM

hi

C

Camisado•10/28/25, 3:58 PM

i joined the server cause i gotta do a project to become an engineer and it has an arduino at its core but now im kind of doubting my choice ahahaha

CCamisado i joined the server cause i gotta do a project to become an engineer and it has ...

L

laith•10/28/25, 3:59 PM

why??

L

laith•10/28/25, 3:59 PM

what kind of arduino?

L

laith•10/28/25, 4:00 PM

it depend on the project and type of arduino (microcontroller)

C

Camisado•10/28/25, 4:02 PM

Im trying to make a assitance list for classes using an arduino uno, and a barcode scanner

C

Camisado•10/28/25, 4:04 PM

so people have these student ids, right? i want the arduino to read through the scanner the barcode in the students ID and compare it with a database in the code itself. if theres any match, it should create an EXCEL file with the student ID, name and career (all of this data i will write in the code)

C

Camisado•10/28/25, 4:04 PM

the barcode scanner is USB

C

Camisado•10/28/25, 4:07 PM

so i KNOW the comparing part is possible but the creating an excel file and the part of using a barcode scanner do got me a bit scared, since i cant change my project anymore. i have already suggested it and it was approven by the university council-goverment-dictatorship-thing

C

Camisado•10/28/25, 4:07 PM

Along with the arduino uno i do have also an USB module and a SD card module

P

Plain•10/28/25, 4:13 PM

Does anyone here do like advising work? Have spent so long on something and not got it working, i'd love to pay someone to help me

T

TrueNorthOP•10/28/25, 4:20 PM

@Plain no but we will help yuo

TTrueNorth @Plain no but we will help yuo

P

Plain•10/28/25, 4:22 PM

I have posted twice and not got a reply yet, that's why I ask

T

TrueNorthOP•10/28/25, 4:27 PM

Moment

TToph 🤔 could be a dead/fried GPIO pin...

T

t0biK_•10/28/25, 4:30 PM

I ordered a new Arduino and the problem still occurs. Can I send you the code and a plan of my wiring?

T

TrueNorthOP•10/28/25, 4:30 PM

Ok, so you're not asking a question, you're seeking confirmation?
Example:
I have this module and would like to read a CAN bus for a x/x/x. The project is x...x, and I want to be able to x..x. After that, I will use this x..x and that x..x to achieve this. I have these assets x..x and have noticed others can do it as well.

VS.

Hey they say do this. yes?

@Plain

Tt0biK_I ordered a new Arduino and the problem still occurs. Can I send you the code an...

T

TrueNorthOP•10/28/25, 4:33 PM

Please link the board you have and share the wiring diagram you're using.

PPlain I have posted twice and not got a reply yet, that's why I ask 😄

T

TrueNorthOP•10/28/25, 4:34 PM

Do you understand?

TTrueNorth Please link the board you have and share the wiring diagram you're using.

T

t0biK_•10/28/25, 4:39 PM

Im using an Arduino Pro Micro and the goal is to check which buton is pressed and than play a sound. Im using the internal pullup and a if else query

T

TrueNorthOP•10/28/25, 4:40 PM

ok so you have 8 buttons?

T

TrueNorthOP•10/28/25, 4:44 PM

@t0biK_

T

t0biK_•10/28/25, 4:45 PM

Yes exactly this is my code

void loop() 
{
  firstButtonState = digitalRead(firstButton);
  secondButtonState = digitalRead(secondButton);
  thirdButtonState = digitalRead(thirdButton);
  fourthButtonState = digitalRead(fourthButton);
  fifthButtonState = digitalRead(fifthButton);
  sixthButtonState = digitalRead(sixthButton);
  seventhButtonState = digitalRead(seventhButton);
  eighthButtonState = digitalRead(eighthButton);


  if(firstButtonState == LOW)
  {
    Serial.println("1");
  }
  else if(secondButtonState == LOW)
  {
    Serial.println("2");
  }
  else if(thirdButtonState == LOW)
  {
    Serial.println("3");
  }
  else if(fourthButtonState == LOW)
  {
    Serial.println("4");
  }
  else if(fifthButtonState == LOW)
  {
    Serial.println("5");
  }
  else if(sixthButtonState == LOW)
  {
    Serial.println("6");
  }
  else if(seventhButtonState == LOW)
  {
    Serial.println("7");
  }
  else if(eighthButtonState == LOW)
  {
    Serial.println("8");
  }
  else
  {
    Serial.println("no button is pressed");
  }
}

void loop() 
{
  firstButtonState = digitalRead(firstButton);
  secondButtonState = digitalRead(secondButton);
  thirdButtonState = digitalRead(thirdButton);
  fourthButtonState = digitalRead(fourthButton);
  fifthButtonState = digitalRead(fifthButton);
  sixthButtonState = digitalRead(sixthButton);
  seventhButtonState = digitalRead(seventhButton);
  eighthButtonState = digitalRead(eighthButton);


  if(firstButtonState == LOW)
  {
    Serial.println("1");
  }
  else if(secondButtonState == LOW)
  {
    Serial.println("2");
  }
  else if(thirdButtonState == LOW)
  {
    Serial.println("3");
  }
  else if(fourthButtonState == LOW)
  {
    Serial.println("4");
  }
  else if(fifthButtonState == LOW)
  {
    Serial.println("5");
  }
  else if(sixthButtonState == LOW)
  {
    Serial.println("6");
  }
  else if(seventhButtonState == LOW)
  {
    Serial.println("7");
  }
  else if(eighthButtonState == LOW)
  {
    Serial.println("8");
  }
  else
  {
    Serial.println("no button is pressed");
  }
}

void loop() 
{
  firstButtonState = digitalRead(firstButton);
  secondButtonState = digitalRead(secondButton);
  thirdButtonState = digitalRead(thirdButton);
  fourthButtonState = digitalRead(fourthButton);
  fifthButtonState = digitalRead(fifthButton);
  sixthButtonState = digitalRead(sixthButton);
  seventhButtonState = digitalRead(seventhButton);
  eighthButtonState = digitalRead(eighthButton);


  if(firstButtonState == LOW)
  {
    Serial.println("1");
  }
  else if(secondButtonState == LOW)
  {
    Serial.println("2");
  }
  else if(thirdButtonState == LOW)
  {
    Serial.println("3");
  }
  else if(fourthButtonState == LOW)
  {
    Serial.println("4");
  }
  else if(fifthButtonState == LOW)
  {
    Serial.println("5");
  }
  else if(sixthButtonState == LOW)
  {
    Serial.println("6");
  }
  else if(seventhButtonState == LOW)
  {
    Serial.println("7");
  }
  else if(eighthButtonState == LOW)
  {
    Serial.println("8");
  }
  else
  {
    Serial.println("no button is pressed");
  }
}

void loop() 
{
  firstButtonState = digitalRead(firstButton);
  secondButtonState = digitalRead(secondButton);
  thirdButtonState = digitalRead(thirdButton);
  fourthButtonState = digitalRead(fourthButton);
  fifthButtonState = digitalRead(fifthButton);
  sixthButtonState = digitalRead(sixthButton);
  seventhButtonState = digitalRead(seventhButton);
  eighthButtonState = digitalRead(eighthButton);


  if(firstButtonState == LOW)
  {
    Serial.println("1");
  }
  else if(secondButtonState == LOW)
  {
    Serial.println("2");
  }
  else if(thirdButtonState == LOW)
  {
    Serial.println("3");
  }
  else if(fourthButtonState == LOW)
  {
    Serial.println("4");
  }
  else if(fifthButtonState == LOW)
  {
    Serial.println("5");
  }
  else if(sixthButtonState == LOW)
  {
    Serial.println("6");
  }
  else if(seventhButtonState == LOW)
  {
    Serial.println("7");
  }
  else if(eighthButtonState == LOW)
  {
    Serial.println("8");
  }
  else
  {
    Serial.println("no button is pressed");
  }
}

T

TrueNorthOP•10/28/25, 4:48 PM

I dont think you can use pin 16 what is it doing currently? whats the effect?

T

Toph•10/28/25, 4:52 PM

it's an SPI pin but should still be able to use it as a regular digital pin... assuming it was configured with an internal pullup...

TTrueNorth I dont think you can use pin 16 what is it doing currently? whats the effect?

T

t0biK_•10/28/25, 4:54 PM

The output from the code usually shows “no button is pressed,” but as soon as I move the Arduino or briefly press the button, the output jumps between “no button is pressed” and “button 8 is pressed.” Even if I remove button 8 and leave the pin empty, the output jumps between the two cases.

T

TrueNorthOP•10/28/25, 4:55 PM

Ok so I am thinking this, and I can be wrong, toph, IIRC pin 16 is an analog port on some boards. so Im sondering if it might be mapped wrong?

Maybe we need to use direct port, and try that?

T

Toph•10/28/25, 4:56 PM

well I was going by the SparkFun board so it depends on the specific board they are using

T

Toph•10/28/25, 4:57 PM

(as well as whether they actually soldered headers to the board or not ~I can't recall if they've confirmed this at some point in the past)

T

Toph•10/28/25, 4:58 PM

.... nope... just checked back... they never showed the board they were using or how it's connected to their breadboard... so

T

TrueNorthOP•10/28/25, 4:59 PM

void setup() {
  Serial.begin(9600);

  DDRB &= ~(1 << DDB2);    
  PORTB |= (1 << PORTB2);   
}

void loop() {
  bool pin16State = !(PINB & (1 << PINB2));
  if (pin16State) {
    Serial.println("8");
  } else {
    Serial.println("no button is pressed");
  }

  delay(100); // Optional debounce
}

void setup() {
  Serial.begin(9600);

  DDRB &= ~(1 << DDB2);    
  PORTB |= (1 << PORTB2);   
}

void loop() {
  bool pin16State = !(PINB & (1 << PINB2));
  if (pin16State) {
    Serial.println("8");
  } else {
    Serial.println("no button is pressed");
  }

  delay(100); // Optional debounce
}

void setup() {
  Serial.begin(9600);

  DDRB &= ~(1 << DDB2);    
  PORTB |= (1 << PORTB2);   
}

void loop() {
  bool pin16State = !(PINB & (1 << PINB2));
  if (pin16State) {
    Serial.println("8");
  } else {
    Serial.println("no button is pressed");
  }

  delay(100); // Optional debounce
}

void setup() {
  Serial.begin(9600);

  DDRB &= ~(1 << DDB2);    
  PORTB |= (1 << PORTB2);   
}

void loop() {
  bool pin16State = !(PINB & (1 << PINB2));
  if (pin16State) {
    Serial.println("8");
  } else {
    Serial.println("no button is pressed");
  }

  delay(100); // Optional debounce
}

Please try this code, and post a real image of your board for us to look at clear and detailed image.@t0biK_

T

t0biK_•10/28/25, 5:00 PM

I will try it in 20 minutes and send you a picture

T

TrueNorthOP•10/28/25, 5:00 PM

ok

T

Toph•10/28/25, 5:00 PM

ah, so just checking GPIO 16... worth a shot...

T

TrueNorthOP•10/28/25, 5:01 PM

yeh Im just wondering if its not mapped to the right port, it might be checking an analog pin by accadent?

T

Toph•10/28/25, 5:01 PM

( I forget, that wouldn't set INPUT_PULLUP though, right?)

T

TrueNorthOP•10/28/25, 5:01 PM

"PORTB |= (1 << PORTB2); " that should??? Im rusty, so I can be wrong