mutilplesAtelier2GentleReminder

buzzerV1.ino

/*
 * Every Button click increases the amount of delay by 30s
 * before sound occurs. Alarm is initiated after a button press has been registered
 * 
 * 
 *  note: -not the best debouncing used for button presses
 *         -no delay() has been used in case other things need to happen at the same time
 * 
 */

const int buzzerPin = 9; //buzzerPin on pin 9
const int buttonPin = 5; //button on pin 5

int buttonState; //hold state HIGH or LOW of button

unsigned long currentTime; //store time from when controller has started
unsigned long previousTime = 0; // previous time to use instead of delay
unsigned long offsetTime; // start of time when button is pressed
unsigned long timeReset; //the result of currentTime - offsetTime

unsigned long buttonPressTime  = 0; //delay to only check on button every so often
bool buttonPressed = false; // has a buttonPress been registered
unsigned long timeCounter = 0; // where we're gonna store the amount of time to wait before buzzing

bool timeSet = false; //bool to determine whether time has been set or not

void setup(){
  Serial.begin(9600);
  pinMode(buzzerPin, OUTPUT); // Set buzzerPin as an output
  pinMode(buttonPin, INPUT); //Set buttonPin as input
 
}

void loop(){

  currentTime = millis();
  
  if(currentTime - buttonPressTime >= 100) { 
    buttonState = digitalRead(buttonPin);
    buttonPressTime = currentTime;
    }
    
   if((buttonState == HIGH) && (buttonPressed == false)){
      timeCounter += 30000; //30 sec
      buttonPressed = true;
      offsetTime = millis();
      timeSet = true;
      
    } else if (buttonState == LOW) {
      buttonPressed = false;
    }

 Serial.println(timeCounter);
  
 timeReset = (millis() - offsetTime);
  
 if(timeSet){
    if(timeReset - previousTime >= timeCounter){
       previousTime = timeReset;
 
       tone(buzzerPin, 1000);
   }
  }
 
}