| /* | |
| Switch statement with serial input | |
| Demonstrates the use of a switch statement. The switch statement allows you | |
| to choose from among a set of discrete values of a variable. It's like a | |
| series of if statements. | |
| To see this sketch in action, open the Serial monitor and send any character. | |
| The characters a, b, c, d, and e, will turn on LEDs. Any other character will | |
| turn the LEDs off. | |
| The circuit: | |
| - five LEDs attached to digital pins 2 through 6 through 220 ohm resistors | |
| created 1 Jul 2009 | |
| by Tom Igoe | |
| This example code is in the public domain. | |
| https://www.arduino.cc/en/Tutorial/BuiltInExamples/SwitchCase2 | |
| */ | |
| void setup() { | |
| // initialize serial communication: | |
| Serial.begin(9600); | |
| // initialize the LED pins: | |
| for (int thisPin = 2; thisPin < 7; thisPin++) { | |
| pinMode(thisPin, OUTPUT); | |
| } | |
| } | |
| void loop() { | |
| // read the sensor: | |
| if (Serial.available() > 0) { | |
| int inByte = Serial.read(); | |
| // do something different depending on the character received. | |
| // The switch statement expects single number values for each case; in this | |
| // example, though, you're using single quotes to tell the controller to get | |
| // the ASCII value for the character. For example 'a' = 97, 'b' = 98, | |
| // and so forth: | |
| switch (inByte) { | |
| case 'a': | |
| digitalWrite(2, HIGH); | |
| break; | |
| case 'b': | |
| digitalWrite(3, HIGH); | |
| break; | |
| case 'c': | |
| digitalWrite(4, HIGH); | |
| break; | |
| case 'd': | |
| digitalWrite(5, HIGH); | |
| break; | |
| case 'e': | |
| digitalWrite(6, HIGH); | |
| break; | |
| default: | |
| // turn all the LEDs off: | |
| for (int thisPin = 2; thisPin < 7; thisPin++) { | |
| digitalWrite(thisPin, LOW); | |
| } | |
| } | |
| } | |
| } | |