//Exercise 1: Combine a switch and potentiometer.
//The switch should turn on and off the light while the potentiometer will fade up and down the light (but only when its on).
int potPin = A5;
int potReading = 0; //create a variable to hold the pot reading
int ledPin = D2;
int ledBrightness = 0; //create a variable to store the LED brightness
int switchPin = D3;
void setup() {
pinMode(ledPin,OUTPUT); //set pin as output
pinMode(switchPin,INPUT_PULLUP); //set pin as input
Spark.variable("pot", potReading ); //create a cloud variable of type integer
}
void loop() {
int switchState = digitalRead(switchPin);
//use analogRead to read the potentiometer reading
//This gives us a value rom 0 to 4095
if (switchState == LOW)
{
digitalWrite(ledPin, HIGH);
potReading = analogRead(potPin); //0-4095
//Map this value into the PWM range (0-255)
//And store as the led brightness
int ledBrightness = map(potReading,0,4095,0,255);
//fade the LED to the desired brightness
analogWrite(ledPin, ledBrightness ); //0-255
//wait 1/10th of a second and then loop
delay(100);
}else{
digitalWrite(ledPin, LOW);
}
}
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