BusAlert

int ledPinRed = D3;
int ledPinGreen = D4;
int ledPinYellow = D2;
int knockSensor = A0;
bool state = false;

int timeToBus = 0;


void setup() {
    //initial state of all 3 pins

    pinMode(ledPinRed, OUTPUT);
    digitalWrite(ledPinRed, LOW);
    
    pinMode(ledPinGreen, OUTPUT);
    digitalWrite(ledPinGreen, LOW);
    
    pinMode(ledPinYellow, OUTPUT);
    digitalWrite(ledPinYellow, LOW);
    
    //Port Authority webhook

    Particle.subscribe("hook-response/bustime", myBusTimeHandler, MY_DEVICES);
    
    //view variable value in console

    Particle.variable("timeToBus", timeToBus);
}

void loop() {
    //read sensor

    int sensorReading = analogRead(knockSensor);
  
    //change state when sensor is pressed

    if (sensorReading > 100){
        state = !state;
    }
    
    //if sensor is pressed, lights respond to the bus time

     if( state == true )
     {
            Particle.publish( "bustime" );
            delay( 1000 );
            if(timeToBus > 10) 
            {
                digitalWrite(ledPinGreen, HIGH);
                digitalWrite(ledPinRed, LOW);
                digitalWrite(ledPinYellow, LOW);
            }
            else if(timeToBus <= 10 && timeToBus > 5) 
            {
                digitalWrite(ledPinYellow, HIGH);
                digitalWrite(ledPinRed, LOW);
                digitalWrite(ledPinGreen, LOW);
            } 
            else if(timeToBus <= 5 && timeToBus > 3) 
            {
                digitalWrite(ledPinRed, HIGH);
                digitalWrite(ledPinYellow, LOW);
                digitalWrite(ledPinGreen, LOW);
            } 
            else if(timeToBus <= 3) 
            {
                digitalWrite(ledPinRed, HIGH);
                delay(100);
                digitalWrite(ledPinRed, LOW);
                delay(100);
            }
     }
    else //if sensor is pressed again, state changes to false, lights turn off

    {
        digitalWrite(ledPinYellow, LOW);
        digitalWrite(ledPinRed, LOW);
        digitalWrite(ledPinGreen, LOW);
    }
     
}


//method for Port Authority webhook

void myBusTimeHandler(const char *event, const char *data) {
    
    // Handle the integration respo

    String busPrediction = String( data );
    
    if( busPrediction.equals( "DUE" ) ){
        timeToBus = 0;
    }else{
        timeToBus = busPrediction.toInt();
    }
}