lighthouse.ino

#define LIGHT_PIN 13
#define BUTTON_PIN 8

unsigned int lightState = LOW;
unsigned long toggleAt = 0;
unsigned long lastSwitch = 0;




unsigned long northRonWaitTimes[] = {750, 10000 - 750};
unsigned long startPointWaitTimes[] = {750, 750, 750, 20000 - 750 * 3};
unsigned long sumburghHeadWaitTimes[] = {750, 750, 750, 750, 750, 30000 - 750 * 4};

char names[][20] = {"North Ronaldsay", "Start Point", "Sumburgh Head"};

unsigned long *lightHouse[] = {northRonWaitTimes, startPointWaitTimes, sumburghHeadWaitTimes};



unsigned int lightHouseCount = 3;
unsigned int currentLightHouse = 0;

unsigned int waits[] = {2, 4, 6}; 

unsigned int waitTimeIx = 0;

int previousButtonState = LOW;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.write("somethingorother\n");
  pinMode(LIGHT_PIN, OUTPUT);
  pinMode(BUTTON_PIN, INPUT);
}

void loop() {
  checkButton();
 
  if(millis() > toggleAt) {
    toggle();
    toggleAt = toggleAt + lightHouse[currentLightHouse][waitTimeIx]; 
    waitTimeIx = (waitTimeIx + 1) % waits[currentLightHouse];
  }
  digitalWrite(LIGHT_PIN, lightState);
 }


void toggle() {
  Serial.println(names[currentLightHouse]);
  if(lightState == HIGH){
    lightState = LOW;
  } else {
    lightState = HIGH;
  }
  
}



void checkButton() {
  int buttonState = digitalRead(BUTTON_PIN);
  if(HIGH == buttonState) {
    digitalWrite(LIGHT_PIN, HIGH);
  } 

  long now = millis();
  if (LOW == buttonState && buttonState != previousButtonState && now - lastSwitch > 3000){
    
    currentLightHouse = (currentLightHouse + 1) % lightHouseCount;
    toggleAt = now + 1000;
    waitTimeIx = 0;
    lastSwitch = now;
    lightState = LOW;
    
    Serial.write("Switching to ");
    Serial.println(names[currentLightHouse]);
    
  } 
  previousButtonState = buttonState;
}