IDeATe

Outcome

Intention

The goal of this project was to explore some introductory skills for designing Internet of Things (IoT) devices. My goal was to make a smart light, using an LED, that could have adjustable dimming settings via Wi-Fi.

Move up Delete Move down

Show Advanced Options

Move up Delete Move down

Process

I started with a simple circuit consisting of a Photon 2 microcontroller, a red LED, and a 1 kOhm resistor. At first, I started with my LED being controlled by pin D2 as I tested simple HIGH and LOW digital output controls to turn the LED on and off. I then tried to use this same D2 pin for pulse width modulation (PWM) control through the analogWrite() function, but it did not work. I then changed my circuit and code to control the LED using the D1 pin and as able to successfully adjust the brightness from my Particle Console. I used a Particle function that accepted a String input and converted it to an integer to set the brightness to if the value was withing bounds.

Move up Delete Move down

// Include Particle Device OS APIs
//#include "Particle.h"
//Adwoa Asare
//10/24/2024
// Let Device OS manage the connection to the Particle Cloud
//SYSTEM_MODE(AUTOMATIC);


int led1 = D1;
int brightness = 0;

// setup() runs once, when the device is first turned on
void setup() {
  
   
    //digitalWrite(led1,LOW);
    Particle.function("led1",ledControl);
    Particle.variable("brightness", brightness);
     pinMode(led1, OUTPUT);
}

// loop() runs over and over again, as quickly as it can execute.
void loop() {
  
    /*blink code
    digitalWrite(led1,HIGH);//LED ON
    delay(1000);//1 sec delay
    digitalWrite(led1,LOW);//LED OFF
    delay(1000);//1 sec delay
    */

}
/*
int ledControl(String command){
    int state = LOW;
    
    //set new state of LED
    if(command=="HIGH"){
        state = HIGH;
    }else if(command=="LOW"){
        state = LOW;
    }else{
        return -1;
    }
    
    //output state to pin for LED
    digitalWrite(led1, state);
    return 1;
    
}
*/
int ledControl(String command){
    //convert command to an int
    brightness = command.toInt();
    
    //bounds checking
    if(brightness > 255 || brightness <0) return -1;
    
    //set brightness of led using PWM
    analogWrite(led1, brightness);
    return 1;
}

Show Advanced Options

Move up Delete Move down

Show Advanced Options

Move up Delete Move down

Outcome

My project was successful because I was able to control the brightness of my LED over Wi-Fi from my Particle Console. I tested the brightness at various different levels and observed the change. You can see my work here: https://youtu.be/baOVN3q9evc?si=OdvN9r0wGIftDDqJ

Move up Delete Move down

Reflection

I learned how to make functions that you could interact with over Wi-Fi. In the future, I would add some complexity to this project by adding more LEDs or using an RGB LED so I could make different colors. Overall, this was a good introduction to learning how to communicate with the Photon 2 and to understand the capabilities of the different pins.

You can upload files of up to 20MB using this form.

Add Rich Text Add Code Block Add Embeddable Content

Outcome

Intention

Attribution

Process

Attribution

Attribution

Outcome

Reflection