Published November 20, 2019

LED Light Strip Controlled by Amazon Alexa

UNC Charlotte - MEGR3171 Introduction to Instrumentation - Fall 2019 IOT Project

BeginnerFull instructions provided17 hours685

LED Light Strip Controlled by Amazon Alexa

Things used in this project

Hardware components

Particle Argon

Amazon Alexa Echo Dot

Breadboard (generic)

Multi-White USB LED Light Strip - 6.5ft

Software apps and online services

ThingSpeak API

IFTTT Amazon Alexa service

Story

Live Thingspeak Data:

https://thingspeak.com/channels/907110

This project allows for an LED light strip to be controlled by an Amazon Alexa. It includes communication between two Particle Argons that send information to Alexa using IFTTT ("If This Then That"). Multiple commands are made in IFTTT that Alexa will respond to by changing the lights based on the command given.

These commands include:

Lights on
Lights off
Red
Orange
Yellow
Green
Blue
Aqua
Purple
Pink
Party Mode (flashing multiple colors)

One Particle Argon is connected to the LED light strip while the other is only used for communication. The communication Argon sends and receives values from the light control Argon, while that argon communicates with Alexa using IFTTT to turn on the lights.

Light Command Argon Attached to LED Light Strip - Lights On

The LED light strip includes 5 wires; blue, red, green, white, and black. The blue wire is connected to the blue LED light, the red wire is connected to the green LED light, and the green wire is connected to the red LED light. The white is for the pure white LEDs that was not used for this project, we focused on using the colored LEDs. And the black wire powers the lights. The wires that control the colored LEDs are connected to the analogs corresponding to the code, A0-blue, A1-green, A2-red. The black wire is connected to the USB power output.

Wire Setup on Light Command Argon

Entire Setup

Code

void lights(const char *event, const char *data){
   
    Particle.publish("transmission", data, PRIVATE);
    delay(1000);
   
}
 
void responce(const char *event, const char *data){
   
    if (strcmp(data, "1")==0) {
   
        digitalWrite(D7, HIGH);
        delay(500); 
        digitalWrite(D7, LOW);
        delay(500);
   
    }
   
    else {}
   
}
 
 
void setup() {
   
    pinMode(D7, OUTPUT);
 
}
 
void loop() {
 
    Particle.subscribe("party_lights", lights, MY_DEVICES);
    delay(1000);
   // String test = String(1);
    //Particle.publish("party_lights", test, PRIVATE);
    //delay(2000);
    //Particle.publish("party_lights", "0", PRIVATE);
    //delay(2000);
    
    Particle.subscribe("response", responce, MY_DEVICES);
    delay(1000);
}

void trans(const char *event, const char *data){
    
     String responsevalue = String(1);
        Particle.publish("response", responsevalue, PRIVATE);
        delay(2000);
   
    if (strcmp(data, "0")==0) { // lights off
       
        analogWrite(A0, 255); //blue
        analogWrite(A1, 255); //green
        analogWrite(A2, 255); //red
        
    }
       
    else if (strcmp(data, "1")==0) { // lights on
       
        analogWrite(A0, 0); 
        analogWrite(A1, 0);  
        analogWrite(A2, 0); 
 
    }
        
    else if (strcmp(data, "2")==0) { // red
       
        analogWrite(A0, 255); 
        analogWrite(A1, 255); 
        analogWrite(A2, 0); 

    }
    else if (strcmp(data, "3")==0) { // orange
       
        analogWrite(A0, 255);
        analogWrite(A1, 127);
        analogWrite(A2, 0);

    }
     else if (strcmp(data, "4")==0) { // yellow
       
        analogWrite(A0, 255);
        analogWrite(A1, 0);
        analogWrite(A2, 0);
        

    }
     else if (strcmp(data, "5")==0) { // green
       
        analogWrite(A0, 255);
        analogWrite(A1, 0);
        analogWrite(A2, 255);
        
    }
     else if (strcmp(data, "6")==0) { // blue
       
        analogWrite(A0, 0);
        analogWrite(A1, 255);
        analogWrite(A2, 255);
        
    }
     else if (strcmp(data, "7")==0) { // aqua
       
        analogWrite(A0, 0);
        analogWrite(A1, 127);
        analogWrite(A2, 255);
        
    }
     else if (strcmp(data, "8")==0) { // purple
       
        analogWrite(A0, 0);
        analogWrite(A1, 255);
        analogWrite(A2, 0);
    
    }
     else if (strcmp(data, "9")==0) { // pink
       
        analogWrite(A0, 127);
        analogWrite(A1, 255);
        analogWrite(A2, 0);

    }
   
    else if (strcmp(data, "12")==0 || strcmp(data, "12") !=0)  {
       
        analogWrite(A0, 127);  // pink
        analogWrite(A1, 255);
        analogWrite(A2, 0);
        delay(1500);
       
        analogWrite(A0, 255); // off
        analogWrite(A1, 255);
        analogWrite(A2, 255);
        
        analogWrite(A0, 255); // green
        analogWrite(A1, 0);
        analogWrite(A2, 255);
        
        analogWrite(A0, 255);
        analogWrite(A1, 255); //off
        analogWrite(A2, 255);
        delay(1500);
        
        analogWrite(A0, 255);
        analogWrite(A1, 255); //red
        analogWrite(A2, 0);
        
        analogWrite(A0, 255);
        analogWrite(A1, 255); // off
        analogWrite(A2, 255);
        delay(1500);
        
        analogWrite(A0, 0);
        analogWrite(A1, 255);  // purple
        analogWrite(A2, 0);
        
        analogWrite(A0, 255); // off
        analogWrite(A1, 255);
        analogWrite(A2, 255);
        delay(1500);
        
        analogWrite(A0, 0); // blue
        analogWrite(A1, 255);
        analogWrite(A2, 255);
        
        analogWrite(A0, 255); //off
        analogWrite(A1, 255);
        analogWrite(A2, 255);
        delay(1500);
        
        analogWrite(A0, 255); //orange
        analogWrite(A1, 127);
        analogWrite(A2, 0);
        
        analogWrite(A0, 255); // off 
        analogWrite(A1, 255);
        analogWrite(A2, 255);
        delay(1500);
        
        analogWrite(A0, 0);
        analogWrite(A1, 255); // aqua
        analogWrite(A2, 127);
        
        analogWrite(A0, 255);
        analogWrite(A1, 255); // off
        analogWrite(A2, 255);
        delay(1500);
        
        analogWrite(A0, 255);
        analogWrite(A1, 0); // yellow
        analogWrite(A2, 0);
        
        analogWrite(A0, 255);
        analogWrite(A1, 255); // off
        analogWrite(A2, 255);
        delay(1500);
        
        analogWrite(A0, 0);
        analogWrite(A1, 0); // white
        analogWrite(A2, 0);
        
        analogWrite(A0, 255);
        analogWrite(A1, 255); // off
        analogWrite(A2, 255);
    }
    else {}

delay(1000);    
}
    
    
void setup() {
 
    pinMode(A0, OUTPUT);
    pinMode(A1, OUTPUT);
    pinMode(A2, OUTPUT);
 
}
 
void loop() {
 
    Particle.subscribe("transmission", trans, MY_DEVICES);
    delay(1000);
}

Credits

Emily Barnett

1 project • 3 followers

Kwok Leong Yan

0 projects • 1 follower

LED Light Strip Controlled by Amazon Alexa

Things used in this project

Hardware components

Software apps and online services

Story

Schematics

Light Command(Top) and Communication(Bottom) Schematic

Code

Communication

Light Control

Credits

Emily Barnett

Kwok Leong Yan

Comments

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LED Light Strip Controlled by Amazon Alexa

LED Light Strip Controlled by Amazon Alexa

Things used in this project

Hardware components

Software apps and online services

Story

Schematics

Light Command(Top) and Communication(Bottom) Schematic

Code

Communication

Light Control

Credits

Emily Barnett

Kwok Leong Yan

Comments

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