![]() This means that the IF test always passes and the ELSE never happens.Īs the LED is cleared only when the else occurs, the LED stays lit. Note, larger systems with numerous events will use priority queues to implement lower-overhead versions of the same ideas.Ī fatal problem is caused by the two lines of code below.Ī variable is set and then the same variable is immediately tested to see if it is set. The code above compiles ok in the Arduino IDE but I haven't tested it on an Arduino device. If(currentMillis - previousMillis > interval) // Finish current millisecond Long interval = 1000 // interval at which to blink (milliseconds) Int buttonPush = 0 // Toggles between 0 to hold state Int buttonState = 0 // Checks if button is pushed Long previousMillis = 0 // will store last time LED was updated const int ledPin = 2 // the number of the LED pinĬonst int buttonPin = 3 // Button pin number Forgive my shortcomings as a programmer, I am learning the programming language still. ![]() The two optical sensors will be used only as time indicators with LEDs and the pushbutton will power the relay. Is there a much better method to do this? There will be two optical sensors and one pushbutton switch attached to an air driven crushing machine. It seemed like a simple program but I can't crack it for some reason. The LED lights up but gets stuck in the loop and doesn't cycle out. I plan to add additional "button pins" for each input. Several of these need to eventually be running, most likely three, so using delay() won't work. It is intended to power a relay and offer a visual cue to when the cycle is over. I am trying to use the millis() function to turn on a pin for a specified interval then turn off and turn on a second pin. ![]()
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