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Outcome

Problem statement

This project was inspired by my friend who had colorful lights in his room. He wanted a way to automate them according to his mood. I designed a lamp, which can be controlled by the tweets he posts on twitter. The color acts as the trigger word - if he tweets pink, the lamp would turn pink. It also has a distance sensor which lights up the lamp as soon as he walks close to the lamp, and shuts off as he walks away from it.

Parts

Bill of parts :

I plan to use the following parts/sensors to automate colorful lights:

1 x Particle Photon

1 x neopixel ring(16)

2 x Breadboards

1 x Distance sensor

- Jumper wires

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Goals

My goal is to create an IoT connected device that can manipulate the lights in my lamp, through a social media platform - twitter. It also has an additional functionality of turning on and off the light based on a distance sensor. The goal is to make my friend( who tweets a lot ) control his lights in his room by tweeting the color he wants as per his mood.

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Process

As I approached this project, I first created an account on thingspeak which is an open source IoT application and API to store and retrieve data using the Http protocol.

Next, I connected the neopixel on a separate breadboard and connected it to the photon using the jumper wires. Then, i added the distance sensor.

The code needed 3 libraries in order to implement - httpclient, neopixel and HC_SR04 for the sensor. I connected my channel on thingspeak and added the ID on my code to establish the Http connection

Finally, I 3D printed a case for the lamp.

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Whatsapp image 2018 01 31 at 10.26.12 pm %281%29

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Whatsapp image 2018 01 31 at 10.26.11 pm

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Whatsapp image 2018 01 31 at 10.26.12 pm

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Below is the circuit digram and the code -

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#include <HC_SR04.h>

// This #include statement was automatically added by the Particle IDE.
#include <HttpClient.h>

// This #include statement was automatically added by the Particle IDE.
#include <neopixel.h>

#include "application.h"
//#include "spark_disable_wlan.h" // For faster local debugging only
#include "neopixel/neopixel.h"

// IMPORTANT: Set pixel COUNT, PIN and TYPE
#define PIXEL_PIN D6 //witch pin do you use to control the leds?
#define PIXEL_COUNT 16 //how many pixels does your lamp have?
#define PIXEL_TYPE WS2812B //witch kind of leds do you use?

#include "HttpClient.h"
HttpClient* client1;


Adafruit_NeoPixel strip = Adafruit_NeoPixel(PIXEL_COUNT, PIXEL_PIN, PIXEL_TYPE);

TCPClient client; 

int ledPin = D7; //onboard LED pin
String responseLine;
String MagicTwitterWord;
unsigned long nextPoll = 0;
int flag = 0;

HttpClient http;
unsigned int nextTime = 0;    // Next time to contact the server


http_header_t headers[] = {
     { "Accept" , "/"},
     { NULL, NULL } // NOTE: Always terminate headers will NULL
 };
 
 http_request_t request;
 http_response_t response;
 
double cm = 0;
int trigPin = D4;
int echoPin = D5;

HC_SR04 rangeFinder = HC_SR04(trigPin, echoPin);

void setup() { 
    Particle.publish("test1","insideSetup");
    Serial.begin(9600);
    pinMode(ledPin, OUTPUT);
    delay(2000);
    pinMode(PIXEL_PIN, OUTPUT);
    strip.begin();
    strip.setBrightness(250);
    strip.show(); // Initialize all pixels to 'off'
}
 
 void loop(){
     
    cm = rangeFinder.getDistanceCM();
    Particle.publish("distance", (String) cm);
    if (cm < 30.00){
        Particle.publish("distance threshold reached", (String) cm);
        SetLedColor(strip.Color(0, 0, 0)); // black
    }else{
     
     if (nextTime > millis()) {
         return;
     }
     
     request.hostname = "api.thingspeak.com";
     request.port = 80;
     request.path = "/channels/413448/field/1/last.txt";
     
     http.get(request, response, headers);
     Particle.publish("test1","response.body-->"+response.body);
     MagicTwitterWord = response.body;
    
     if (MagicTwitterWord == "Off"){
    Particle.publish("test1","Light is now off" +MagicTwitterWord);
    SetLedColor(strip.Color(0, 0, 0)); // black
  }
  // Notification colors
  else if (MagicTwitterWord == "red"){
    Particle.publish("test1","Light is now Red");
    SetLedColor(strip.Color(255, 0, 0)); 
  }
  else if (MagicTwitterWord == "blue"){
    Particle.publish("test1","Light is now Blue");
    SetLedColor(strip.Color(0, 0, 255)); 
  }
  else if (MagicTwitterWord == "green"){
    Particle.publish("test1","Light is now Green");
    SetLedColor(strip.Color(0, 255, 0)); 
  }
  else if (MagicTwitterWord == "purple"){
      Particle.publish("test1","Light is now Purple");
    SetLedColor(strip.Color(250, 0, 250));
  }
  else if (MagicTwitterWord == "pink"){
    Particle.publish("test1","Light is now Pink");
    SetLedColor(strip.Color(255, 0, 255));
  }

// Lighting modes	
  else if (MagicTwitterWord == "cozy"){
    SetLedColor(strip.Color(255, 105, 0));
  }
  else if (MagicTwitterWord == "study"){
    SetLedColor(strip.Color(250, 165, 45)); 
  }
  else if (MagicTwitterWord == "reading"){
    SetLedColor(strip.Color(252, 135, 20)); 
  }
  else if (MagicTwitterWord == "romantic"){
    SetLedColor(strip.Color(255, 75, 0));
  }
  else if (MagicTwitterWord == "industrial"){
    SetLedColor(strip.Color(255, 255, 255)); 
  }
  else {
      Particle.publish("test1","Didn't find a matching magic word.");
  };
     nextTime = millis() + 5000;
    }
 }
 
 void connectToTwitter() {
  if (client.connect("api.thingspeak.com", 80)){
    client.println("GET /channels/413448/field/1/last.txt HTTP/1.0"); 
    client.println();
    Particle.publish("test1","I'm connected to the channel! WooHoo!");
  }
  else {
    Particle.publish("test1","Connection Failed");
  }
  responseLine = "";
  MagicTwitterWord = "";
}



void SetLedColor(uint32_t c) {
  for(uint16_t i=0; i<strip.numPixels(); i++) {
      strip.setPixelColor(i, c);
      strip.show();

  }
}

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Outcome

I learnt how to control lights using a social media platform, and i also learnt how to implement sensors in the code.

The end result of this project is a beautiful lamp which changes color according my tweets, and switches on/off the lights as per the distance.

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Reflections

This project was a very interesting experience.

To add on, i would like to implement a facial recognition system which captures the mood, and then displays the corresponding light.

The coding aspect was not that tough for me, but the electronics was new, and i learnt a lot about the different components used in circuits.

I feel very satisfied with this project and learnt a lot in the process.

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Outcome

Problem statement

Parts

Goals

Process

Attribution

Attribution

Attribution

Attribution

Attribution

Below is the circuit digram and the code -

Attribution

Attribution

Outcome

Reflections