button does NOT work as expected.

I have tried the Button sample project and code. I can not get it to work.
When I upload the code (does this run it?) the LED blinks but the button will not turn it on.

Jkofroth:
I have tried the Button sample project and code. I can not get it to work.
When I upload the code (does this run it?) the LED blinks but the button will not turn it on.

Please post your code and wiring diagram

@Jkofroth

TOPIC SPLIT
DO NOT HIJACK !

Could you take a few moments to READ THIS.
It will help you get the best out of the forum.

Bob.

IoT_hobbyist:
Please post your code and wiring diagram

I discovered the button was not seated into the breadboard properly.
Using the code in the "Arduino - Button Post" I was able to get the message Button Pressed message when I pressed the button and Released when I release it.
I will not go back and do the more complicated example "PUSH BUTTON"
Thanks for the help.

I think I am getting the picture where to post questions. I did read some guidance about this.

Attached is my wiring and the code. The Example button still does not work for me.

/*
Button

Turns on and off a light emitting diode(LED) connected to digital pin 13,
when pressing a pushbutton attached to pin 2.

The circuit:

  • LED attached from pin 13 to ground

  • pushbutton attached to pin 2 from +5V

  • 10K resistor attached to pin 2 from ground

  • Note: on most Arduinos there is already an LED on the board
    attached to pin 13.

created 2005
by DojoDave http://www.0j0.org
modified 30 Aug 2011
by Tom Igoe

This example code is in the public domain.

*/

// constants won't change. They're used here to set pin numbers:
const int buttonPin = 2; // the number of the pushbutton pin
const int ledPin = 13; // the number of the LED pin

// variables will change:
int buttonState = 0; // variable for reading the pushbutton status

void setup() {
// initialize the LED pin as an output:
pinMode(ledPin, OUTPUT);
// initialize the pushbutton pin as an input:
pinMode(buttonPin, INPUT);
}

void loop() {
// read the state of the pushbutton value:
buttonState = digitalRead(buttonPin);

// check if the pushbutton is pressed. If it is, the buttonState is HIGH:
if (buttonState == HIGH) {
// turn LED on:
digitalWrite(ledPin, HIGH);
} else {
// turn LED off:
digitalWrite(ledPin, LOW);
}
}

(mod edit)


It might be that you're not actually switching anything. Is that switch is a big version of one of these:

square buttons.jpg

To guarantee that you're switching, connect to the diagonal corners.

(If you have an ohm meter you should verify that you're doing any switching.)

Hi,
Do you have a DMM to measure circuit parameters?

Tom... :slight_smile:

If you use the code in http://www.arduino.cc/en/Tutorial/Button, you SHOULD use the external pull-up or pull-down register. If you don’t want to use the external pull-up or pull-down resistor, use the internal pull-up instead. See code in this example