Priya Jain - Skills Dev 1 | Project

Process and Outcome

The first exercise I did was creating a simple circuit that made the LED bulb light on and off.
https://youtu.be/PKXGaPfcHck

int ledPin = D2;
int ledValue = 0;

void setup() {
    Particle.function("led", ledControl);
    Particle.variable("brightness", ledValue);
    pinMode(ledPin, OUTPUT);


}

void loop() {
digitalWrite(ledPin, HIGH);
     delay(1000);
    
     digitalWrite(ledPin, LOW);
     delay(1000);
     
}

int ledControl(String command)
{
    // Convert the passed variable to an integer
   ledValue = command.toInt();

   // Check it is a valid number
   if( ledValue > 255 ) return -1;
   if( ledValue < 0 ) return -1;

   // Use PWM to set the brightness
   // of the LED
   analogWrite(ledPin, ledValue);

   // Return 1 to say completed successfully
   return 1;
}

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Process

The second exercise I did was experimenting with the code to make the LED behave differently. In this exercise the LED blinks 5 times and then there is a longer delay after the fifth blink. The cycle repeats on loop.
Here is the video link: https://youtu.be/c-vnKkYZZvM (excuse the background, I recorded this before I was aware we needed videos for the assignment)
Below the additional code I added to the function.

void loop() {
    // digitalWrite(ledPin, HIGH);
    // delay(1000);
    
    // digitalWrite(ledPin, LOW);
    // delay(1000);
    
    //exercise 3
    analogWrite(ledPin, 150);

    
    for(int i=0; i<=5; i++){
        digitalWrite(ledPin, HIGH);
        delay(500);
        digitalWrite(ledPin, LOW);
        delay(500);
        if(i==5){
            delay(3000);
            i=0;
        }
    }

}

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Here I connected it to a particle function so that it turns on and off when I type HIGH and LOW

Skill dev 1 function

Priya Jain - https://youtu.be/g2voR__bR2M

Here I set up two LED lights and updated the code.

int ledPin1 = D2;
int ledPin2 = D3;
int ledValue = 0;

void setup() {
    Particle.function("led1", ledControl);
    Particle.function("led2", led2Control);
    Particle.variable("brightness", ledValue);
    pinMode(ledPin1, OUTPUT);
    pinMode(ledPin2, OUTPUT);


}



int ledControl(String command)
{
   int state = LOW;

   // find out the state of the led
   if(command == "HIGH"){
	   state = HIGH;
   }else if(command == "LOW"){ 
	   state = LOW;
   }else{
	   return -1;
   }

   // write to the appropriate pin
   digitalWrite(ledPin1, state);
   return 1;
}

int led2Control(String command)
{
   int state = LOW;

   // find out the state of the led
   if(command == "HIGH"){
	   state = HIGH;
   }else if(command == "LOW"){ 
	   state = LOW;
   }else{
	   return -1;
   }

   // write to the appropriate pin
   digitalWrite(ledPin2, state);
   return 1;
}

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Reflection

Doing this first simple skills dev assignment was very encouraging. The fact that everything worked correctly was a relief because it meant my environment is set up correctly.

This is my first time working with microcontrollers and it was nice to play around with the code to make the physical components behave as I wanted. I have no experience with hardware, so just following a diagram to make a simple circuit helped a lot.