Serial LED -lab2
Description: serial input 'r', 'g', 'b' will control the brightness of the red, green and blue LED.
Components:
-3 LED's
-Breadboard
-Arduino
-Cotton
-Candle Holder
-Lighter
-220 resistors
/*
* Serial RGB LED
*/
char serInString[100]; // array that will hold the different bytes of the string. 100=100characters;
// -> you must state how long the array will be else it won't work properly
char colorCode;
int redValue = 255;
int greenValue = 255;
int blueValue = 255;
int redPin = 9; // Red LED, connected to digital pin 9
int greenPin = 10; // Green LED, connected to digital pin 10
int bluePin = 11; // Blue LED, connected to digital pin 11
void setup() {
pinMode(redPin, OUTPUT); // sets the pins as output
pinMode(greenPin, OUTPUT);
pinMode(bluePin, OUTPUT);
Serial.begin(9600);
analogWrite(redPin, redValue); // set them all to 255
analogWrite(greenPin, greenValue); // set them all to 255
analogWrite(bluePin, blueValue); // set them all to 255
Serial.println("enter color command (e.g. 'r43' or 'rrrrgb') :");
}
void loop () {
// clear the string
memset(serInString, 0, 100);
//read the serial port and create a string out of what you read
readSerialString(serInString);
colorCode = serInString[0]; //keep track of colorCode in array
redValue = 0; //start color values at 0
greenValue = 0;
blueValue = 0;
//if enter 'r', 'g', 'b' perform for loop
if (colorCode == 'r' || colorCode == 'g' || colorCode == 'b'){
for(int i=0; i<100; i++){ //this is a for loop to go through the array
if(serInString[i]== 'r') //increase brightness by 10
redValue = redValue + 10;
else if(serInString[i]== 'g') //g increases greenpin by 10's
greenValue = greenValue + 10;
else if(serInString[i]== 'b')
blueValue = blueValue + 10;
}
Serial.println(); //tell the user what their input was
Serial.print("Red's: ");
Serial.print(redValue / 10);
Serial.println();
Serial.print("setting color ");
Serial.print("red");
Serial.print(" to ");
Serial.print(redValue);
Serial.println();
Serial.println();
Serial.print("Greens: ");
Serial.print(greenValue / 10);
Serial.println();
Serial.print("setting color ");
Serial.print("green");
Serial.print(" to ");
Serial.print(greenValue);
Serial.println();
Serial.println();
Serial.print("Blues: ");
Serial.print(blueValue / 10);
Serial.println();
Serial.print("setting color ");
Serial.print("blue");
Serial.print(" to ");
Serial.print(blueValue);
Serial.println();
analogWrite(redPin, redValue); //set the values of the leds to the levels that have been indicated
analogWrite(greenPin, greenValue);
analogWrite(bluePin, blueValue);
}
delay(100); //delay program and wait for serial data
}
void readSerialString(char *strArray) {
int i = 0;
if(!Serial.available()) {
return;
}
while (Serial.available()) {
strArray[i]=Serial.read();
i++;
}
}
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