Illuminated momentary switch not working with my code

[MajorBoi47]

Hello, I am trying to use a momentary switch to do a state change detection in my code, however the arduino isn't noticing the button being pushed. I've tested the button with an led and the button works fine, and yet when I connect it to my arduino it doesn't work. I have my button connected like the bottom configuration (to have the button always illuminated), and the positive to the button is coming from a 12v power supply, and the arduino is powered by the same power supply. Any ideas?

Here's a link to what I bought

Amazon.com: ESUPPORT Black Case 12mm Blue LED Light 2A Momentary Push Button...

I'm sorry for posting my code this way, but I can't figure out how to post it correctly

int inPin = 2;
int buttonPushCounter = 0;
int buttonState = 0;
int lastButtonState = 0;
const int numReadings = 10;
void setup() {
pinMode(inPin, INPUT);
Serial.begin(9600);

}

void loop() {
// put your main code here, to run repeatedly:
if (buttonState != lastButtonState) {
if (buttonState == HIGH) {
buttonPushCounter++;
Serial.println("on");
Serial.print("number of button pushes: ");
Serial.println(buttonPushCounter);
} else {
Serial.println("off");
}
delay(50);
}
}

Any help would be appreciated, thanks in advance

[LarryD]

We need to see a proper schematic.

Do not attach 12v to and Arduino input.

Where do you update ‘buttonState‘ ?

FYI

[paulpaulson]

Hello
I´ve found a sketch in my sketch box that might match to your project. You have simply change the I/O pins to your used hardware.

#define ProjectName "Solution for Illuminated momentary switch not working with my code - FORUM -\n"
const int heartBeat {
  LED_BUILTIN
};
// make an object for the used button
struct BUTTON {
  byte switchPin;
  byte ledPin;
  bool state;
  unsigned long stampTime;
  unsigned long debounceTime;
};
// initialize the object
BUTTON button[] {
  {A0, 2, 1, 0, 20},
  {A1, 3, 1, 0, 20},
  {A2, 4, 1, 0, 20},
};
// define the macro for the buttons in use
#define buttonNum unsigned int num=0; num < sizeof(button)/sizeof(BUTTON); num++

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  Serial.print("File   : "), Serial.println(__FILE__);
  Serial.print("Date   : "), Serial.println(__DATE__);
  Serial.print("Project: "), Serial.println(ProjectName);
  pinMode (heartBeat, OUTPUT);
  for (buttonNum) pinMode(button[num].switchPin, INPUT_PULLUP), pinMode(button[num].ledPin, OUTPUT);
}
void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(heartBeat, millis() / 500 % 2);
  for (buttonNum) {
    if (millis() - button[num].stampTime >= button[num].debounceTime)
    {
      button[num].stampTime = millis();
      bool state = digitalRead(button[num].switchPin);
      if (button[num].state != state) {
        button[num].state = state;
        if (state) digitalWrite ( button[num].ledPin, digitalRead(button[num].ledPin) ^ 1);
      }
    }
  }
}