//Security Lamp control by light level for Trinket

//18.12.14

//Program start

//Lamp and status LED off until light level falls.

//Lamp on for fixed period

//Lamp continues on for random period together with LED

//Lamp off for fixed period, LED still on

//LED flashes while light level rises above threshold

//Back to start

//analog pin designations

int readSensorpin = 1;  //Anolog pin is “1”

//digital pin designations

int ledPin = 1;

int sensorPin = 2;   //But to set it as input uses “2”

int lampPin = 0;

//variables

int lightValue;

long lvTotal;

long timeThen;

long timeNow;

long timeSince;

//constants

int downTime = 300;   //time to wait before unit starts again in minutes

long testing = 5000;  //10 secs in milli secs

int hour = 1800000;  //1 hour in milli secs

int dayLight = 35;  //light needs to rise above this to reset device

int lightThreshold = 8;

//was 13 in kitchen. 10 too high in hall?

int timeOn = 300;         // in minutes

void setup()

{

  pinMode(sensorPin , INPUT);

  

  pinMode(lampPin , OUTPUT);

  pinMode(ledPin , OUTPUT);

  

  analogWrite(lampPin , 0);   //lamp is off

  

}

void loop()

{

  digitalWrite(ledPin , LOW);   //led is off

  

 

  //wait for light level to fall

  do

  {

    

    lvTotal = 0;

    lightValue = 0;

    for(int x = 0; x < 100; x++){

      lightValue = analogRead(readSensorpin);

      lvTotal  = lvTotal + lightValue;

      delay(500);     //5 for testing, normally 600

      

    }

    

    lvTotal = lvTotal / 100;   //average light value

    

  }while (lvTotal > 12 );

  

  //turn on lamp

  for(int x = 0; x < 256; x++){

    analogWrite(lampPin, x);

    delay(100);

  }

  //leave light on for a long time

  timeThen = millis();

  do

  {

    

    

    timeNow = millis();

    timeSince = timeNow - timeThen;

  

  }while (timeSince < 200 * 60000); // 60000 seems to be 2 minutes?

  

  

  

  // delay random time up to 1 hour for testing = 10 sec

  digitalWrite(ledPin , HIGH);   //led on

  long rndTime = random(0, 1800000);

  delay(rndTime);

  //digitalWrite(ledPin , LOW);  //led off

  

  // turn off light

  

  for(int x = 255; x > -1 ; x--){

    analogWrite(lampPin, x);

    delay(5);

  }

  

  //wait for several hours

  //led still on

  timeThen = millis();

  do

  {

    timeNow = millis();

    timeSince = timeNow - timeThen;

    

  }while (timeSince < 200 * 60000);  //downtime in minutes

  

  

  //wait for light level to rise

  

   do

  {

    lvTotal = 0;

    lightValue = 0;

    for(int x = 0; x < 100; x++){

      lightValue = analogRead(readSensorpin);

      lvTotal  = lvTotal + lightValue;

      digitalWrite(ledPin , HIGH);

      delay(300);

      digitalWrite(ledPin , LOW);

      delay(300);

    }

    

    lvTotal = lvTotal / 100;  // average light value

    

  }while (lvTotal < 35 );

  

  // originally < 30

  

}

    

  

  

  

    

    

    

      

      

      

      

      

Software for the Adafruit Trinket powered security light