This was a simple example to show sending information using the serial monitor, in our other examples we have generally used the serial monitor for debug, outputting messages.
This example basically switches on red, green or blue on a tri-color LED.
The LED is connected as follows
RED cathode – Pin 10
GREEN cathode – Pin 11
BLUE cathode – Pin 12
The LED was a small breakout with suitable current limiting resistors already in place.
Code
Send a key to switch on a colour, anything else switches it off
[c]
int redPin = 10;
int greenPin = 11;
int bluePin = 12;
void setup()
{
pinMode(redPin,OUTPUT);
pinMode(greenPin,OUTPUT);
pinMode(bluePin,OUTPUT);
AllOff();
Serial.begin(9600);
Serial.println(“Press the following keys”);
Serial.println(“r – switch on red, g – switch on blue, b – switch on green”);
}
void loop()
{
if (Serial.available())
{
char ch = Serial.read();
switch(ch)
{
case ‘r’ : RedOn();
break;
case ‘g’ : GreenOn();
break;
case ‘b’ : BlueOn();
break;
default : AllOff();
break;
}
delay(1000);
}
}
void RedOn()
{
digitalWrite(redPin,LOW);
digitalWrite(bluePin,HIGH);
digitalWrite(greenPin,HIGH);
}
void GreenOn()
{
digitalWrite(redPin,HIGH);
digitalWrite(bluePin,HIGH);
digitalWrite(greenPin,LOW);
}
void BlueOn()
{
digitalWrite(redPin,HIGH);
digitalWrite(bluePin,LOW);
digitalWrite(greenPin,HIGH);
}
void AllOff()
{
digitalWrite(redPin,HIGH);
digitalWrite(greenPin,HIGH);
digitalWrite(bluePin,HIGH);
}
[/c]
