#Hold button to keep light on arduino code

I also use the millis() for timing to make the code non-blocking. See my tutorial on the state change detection method with an active low switch. The button switch is wired active low in the above code. A better way is to wire the switch as active low.

If the button is held for less than 5 seconds, nothing happens. As the title says, pushing the button for 5 seconds to turn on an LED and stays on. The Arduino tutorial uses an active high switch (high when pressed). Hold button for 5 seconds for an LED to turn and stay on. save the current state as the last state, Quick start, get the detailed information or instructions such as IDE,UIFLOW,Arduino. if the current state is LOW then the buttonĭigitalWrite(ledPin, !digitalRead(ledPin)) // toggle the output compare the new buttonState to its previous state Unsigned long interval = 50 // check switch 20 times per second initialize the button pin as a input with internal pullup enabled

by C Goulding aka groundFungusĬonst byte buttonPin = 4 // the pin that the pushbutton is attached toĬonst byte ledPin = 13 // the pin that the LED is attached toīool buttonState = 0 // current state of the buttonīoollastButtonState = 0 // previous state of the button Here is example code using the state change detection method to use a push button to toggle the state of the built in LED (pin 13 on Uno).

Hold button to keep light on arduino