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buttonState = digitalRead(buttonPin[x]); Also, what you high likely want to add is button debouncing (check the arduino example about this), unless you add a delay after showing a screen of a considerable …

You should use the millis function (see millis). Create a variable of type unsigned long and check it against the current time, with some offset. See also the debouncing example, how to use this f …

First I would make create an enumeration type and motor direction variable (instead of the button state): enum EMotorDirection { CLOCK_WISE, COUNTER_CLOCK_WISE } EMotorDirection _motorDirection … = CLOCK_WISE; Then read the button and when it has changed (make a variable `_previousButtonState), adjust the motor direction. int _previousButtonState = LOW; In the loop function: int buttonState …

I have to make an answer, since I cannot use items/links easily in a comment. Instead of creating the application for you, I suggest you do the following: Read/try and experiment with the default A …

When you press a button, there is somehwere between fully pressed and not pressed (or backwards) a state there it 'bounces', e.g. you get lots of state transitions, resulting in seeing a button pressed …

This is a comment (but could not use text alignment in a comment): Instead of if (flag){ digitalWrite(ledPin13, LOW); } else { digitalWrite(ledPin13, HIGH); } You can use: digitalWrite(ledPi …

enum EState { // Button 1 and 2 are not pressed NoButtonsPressed, // Button 1 is pressed, button 2 is not pressed FirstButtonPressed, // Both buttons are pressed BothButtonsPressed }; EState … 1 is still pressed, ignore second button. } else if (digitalRead(2) == HIGH) { // Button 1 is not pressed, button 2 is pressed. …

When using a button (you already put it in a variable), just remove 10 seconds, and update the time. … However, check also the Blink Without Delay example on the Arduino website, since when you press a button, high likely the button will bounce and one press may result in several times 10 seconds will be …

With one of such IC you can connect 8 buttons, however you can daisy chain max 4 to get 4 * 8 = 32 button inputs, only using 4 digital pins of the Arduino. … In your case you would need 3 ICs to get 24 (thus 20) button inputs. …

For the button states: int buttonState1 = 0; // variable for reading the pushbutton status int buttonState2 = 0; int buttonState3 = 0; int buttonState4 = 0; int buttonState5 = 0; you can use boolean buttonStates … To read the button states: buttonState1 = digitalRead(buttonPin1) == 2; buttonState2 = digitalRead(buttonPin2) == 3; buttonState3 = digitalRead(buttonPin3) == 4; buttonState4 = digitalRead(buttonPin4) …

This is caused by button bouncing. When you press a button, for a short time, the contact is somewhere between on and off. … To prevent this, use button debouncing (check the Arduino site for a Button Debounce example). …

It seems pins 11, 12 and 13 do not exist as input pins and pins 0 and 1 are used for RX/TX which you don't want to use neither probably. So instead of using a for loop iterating over indices, you shou …