Published October 17, 2017

Cayenne Diwali Lantern

A smart IOT Diwali lantern which can be turned on, scheduled to turn on at particular time using Cayenne app.

IntermediateShowcase (no instructions)582

Things used in this project

Hardware components

Espressif Wemos D1 Mini

Relay (generic)

Software apps and online services

myDevices Cayenne

Arduino IDE

Story

Overview

Diwali or Deepavali is the hindu festival of lights celebrated every year in autumn in the northern hemisphere (spring in southern hemisphere).

One of the most popular festivals of Hinduism, it spiritually signifies the victory of light over darkness, good over evil, knowledge over ignorance, and hope over despair.

Its celebration includes millions of lights shining on housetops, outside doors and windows, around temples and other buildings in the communities and countries where it is observed.

The festival preparations and rituals typically extend over a five-day period.

Hindu across the world celebrate Diwali in honor of the return of Lord RAMA, wife Sita, brother lakshmana and lord Hanuman to Ayodhya from exile of 14 years after Rama defeated Ravana. To honor and celebrate Lord Rama, Sita, Lakshmana and Hanuman returning from Sri Lanka and to illuminate their path, villagers light Diyas to celebrate the triumph of good over evil.

A kandeel is a lantern with a wooden framework and covered in coloured matte or glossy papers. These lanterns are generally hung in front of homes during the Hindu festival of lights, Diwali.

During the Hindu lunar month of 'Kartika', the people use to put akasha deepam, colloquially known in Konkani dialect "Panjire", in place on roof tops of the houses and light them in the evening until dawn breaks in and up to the Karthika Paurnami (full moon) day or Dev Dewali day. Earlier oil lamps were used, which are fixed in the panjire (cage models), now colourful electrical lights are used instead. By lighting the panjiras it is believed that during Kartika those who had died used to visit their houses and wish their relatives wellbeing, or if the lights were not lit in front of the house, the curses them to live them in darkness in life.

Kandeels are hung for around a month from the first day of Diwali. Kandeels are traditionally built in a crystal shape with tails at the bottom; shapes include stars, globes and airplanes. Opaque papers cut into a complex design give more beauty to a Kandeel by blocking some of the light behind it.

Cayenne Smart Lantern Implementation

Using Cayenne app we can set the color to red, green or blue. We can also set to shuffle between the three colors. A stop button stops all the light bulbs.

One of best thing is that using Cayenne's scheduling feature we can set the lantern to turn on shuffle button at 7pm and turn on the off button at 5am so all lights are switched off. This can be scheduled for all the 5 days of diwali celebration.

Add five digital output widget to dashboard with virtual pins selected.

Videos

Smart_Diwali_Lattern.ino

class Flasher
{
    // Class Member Variables
    // These are initialized at startup
    int ledPin;      // the number of the LED pin
    long OnTime;     // milliseconds of on-time
    long OffTime;    // milliseconds of off-time

    // These maintain the current state
    int ledState;                 // ledState used to set the LED
    unsigned long previousMillis;   // will store last time LED was updated

    // Constructor - creates a Flasher
    // and initializes the member variables and state
  public:
    Flasher(int pin, long on, long off)
    {
      ledPin = pin;
      pinMode(ledPin, OUTPUT);

      OnTime = on;
      OffTime = off;

      ledState = LOW;
      previousMillis = 0;
    }

    void Update()
    {
      // check to see if it's time to change the state of the LED
      unsigned long currentMillis = millis();

      if ((ledState == HIGH) && (currentMillis - previousMillis >= OnTime))
      {
        ledState = LOW;  // Turn it off
        previousMillis = currentMillis;  // Remember the time
        digitalWrite(ledPin, ledState);  // Update the actual LED
      }
      else if ((ledState == LOW) && (currentMillis - previousMillis >= OffTime))
      {
        ledState = HIGH;  // turn it on
        previousMillis = currentMillis;   // Remember the time
        digitalWrite(ledPin, ledState);   // Update the actual LED
      }
    }
};
#define CAYENNE_DEBUG
#define CAYENNE_PRINT Serial
#include <CayenneMQTTESP8266.h>

// WiFi network info.
char ssid[] = "Redmi";
char wifiPassword[] = "shramik49";

// Cayenne authentication info. This should be obtained from the Cayenne Dashboard.
char username[] = "1e6889a0-a8a0-11e6-a85d-c165103f15c2";
char password[] = "0a7443db1f633b13a06d00adea16f34e1b14f1d2";
char clientID[] = "aa3a2da0-b329-11e7-b177-579293954599";
int x;

Flasher led1(4, 1000, 1000);
Flasher led2(0, 2000, 1000);
Flasher led3(2, 3000, 1000);

void setup()
{
  Serial.begin(9600);
  Cayenne.begin(username, password, clientID, ssid, wifiPassword);
}

void loop()
{
  Cayenne.loop();
  if (x == 1)
  {
    led1.Update();
    led2.Update();
    led3.Update();
  }
  if (x == 3)
  {
    digitalWrite(4, HIGH);
    digitalWrite(0, LOW);
    digitalWrite(2, LOW);
  }
  if (x == 4)
  {
    digitalWrite(4, LOW);
    digitalWrite(0, HIGH);
    digitalWrite(2, LOW);
  }
  if (x == 5)
  {
    digitalWrite(4, LOW);
    digitalWrite(0, LOW);
    digitalWrite(2, HIGH);
  }
  if (x == 2)
  {
    digitalWrite(4, LOW);
    digitalWrite(0, LOW);
    digitalWrite(2, LOW);
  }
}
CAYENNE_IN(1)
{
  int ledpattern = getValue.asInt();
  if (ledpattern == 1)
  {
    x = 1;
  }
}

CAYENNE_IN(3)
{
  int ledpattern3 = getValue.asInt();
  if (ledpattern3 == 1)
  {
    x = 3;
  }
}
CAYENNE_IN(4)
{
  int ledpattern4 = getValue.asInt();
  if (ledpattern4 == 1)
  {
    x = 4;
  }
}
CAYENNE_IN(5)
{
  int ledpattern5 = getValue.asInt();
  if (ledpattern5 == 1)
  {
    x = 5;
  }
}
CAYENNE_IN(6)
{
  int ledpattern6 = getValue.asInt();
  if (ledpattern6 == 1)
  {
    x = 2;
  }
}