Arduino Workshop - Chapter Three - SWITCH CASE Statements

In this section, we'll dive into using 'switch' cases to implement comparative lists and outcomes.

[thomasalexander]

[In Borat's voice] Very nice, i like! High five!!!

[harrisonhill]

I would like to put this out there: when using the switch case functions, a semicolon must be included at the end of the last case line before declaring a break, so that it will recognize the case function and break.

[sasukecruz]

This actually really helped. Sure explained it better than my college professor

[kristapsberzins]

Hello, thank you for the video. When switch case is triggered, how does it know which switch case is which? I did not see you defining that case 0 is value [0:51] (255:5=51) or case 1 is 51:102.

[paulpixzy]

Please i need yur help! Can a switch case run on arduino setup to switch 2pwm code on one pin please please

[bitcloud]

i have a question. If i want a more accurate potentiometer value then can i turn it into a float when dividing the original value by 4

[andremuslim]

can we make a code like this
switch(situation && led1){
case 1 && HIGH:
do something
break;
}

[andrewferg]

Been trying to use "if' to switch between "Stepper Sp Control" loop and "Motor Knob" loop. Compiles fine, but still doesn't work. I'll try implementing it with "switch / case" and see if it helps. Any suggestions?

[naboulsikhalid]

really good explanation. sometimes we use if (if...)I mean if inside if, can we use it in switch case? switch case(somevalue1)
case (switch case(somevalue2):??. can you help. will be grateful.

[DIVERGEsound]

little disappointed a tutorial workshop doesn't have any replies to comments...

[robinfeathers]

Thanks for this video! I just happened to stumble across it as I was trying to come up with the best way to do a project, and it was the perfect timing. I got the sketch completed in record time because of this tutorial.

[Quantum_innovations]

HI
can you help and suggest me how to add 2 second delay in the any of CASE .

[akroutsamo]

Hi, well it's a bit hard when setting a User interface LCD menu and sub menu
its complicating for even a simple RTC ds3231 TIME and Date setup with a rotary encoder
i hope you make a Tuto covering this bit example
thanks

[taranagnew]

I am getting Arduino: 1.8.5 (Windows Store 1.8.10.0) (Windows 10), Board: "Arduino/Genuino Uno"

In file included from

error: expected unqualified-id before numeric constant

#define DFR_LCD_KEYPAD_KEY_SELECT 4

^

note: in expansion of macro 'DFR_LCD_KEYPAD_KEY_SELECT'

#define KEY_SELECT DFR_LCD_KEYPAD_KEY_SELECT

^

note: in expansion of macro 'KEY_SELECT'

int KEY_SELECT;

^

In function 'void loop()':

dice_for_catan:37: error: case label '1' not within a switch statement

case 1:

^

dice_for_catan:39: error: break statement not within loop or switch

break;

^

dice_for_catan:41: error: case label '0' not within a switch statement

case 0:

^

dice_for_catan:42: error: 'nothing' was not declared in this scope

do nothing

^

dice_for_catan:43: error: expected 'while' before '}' token

}

^

dice_for_catan:43: error: expected '(' before '}' token

dice_for_catan:43: error: expected primary-expression before '}' token

dice_for_catan:43: error: expected ')' before '}' token

dice_for_catan:43: error: expected ';' before '}' token

At global scope:

dice_for_catan:46: error: expected constructor, destructor, or type conversion before '(' token

randomSeed(analogRead(0));

^

dice_for_catan:48: error: 'diceOne' does not name a type

diceOne = random(1, 7);

^

dice_for_catan:49: error: 'diceTwo' does not name a type

diceTwo = random(1, 7);

^

dice_for_catan:52: error: expected constructor, destructor, or type conversion before ';' token

buildUp();

^

dice_for_catan:53: error: 'lcd' does not name a type

lcd.clear();

^

dice_for_catan:54: error: 'lcd' does not name a type

lcd.setCursor(7, 0);

^

dice_for_catan:55: error: 'lcd' does not name a type

lcd.print(diceOne);

^

dice_for_catan:56: error: 'lcd' does not name a type

lcd.setCursor(7, 1);

^

dice_for_catan:57: error: 'lcd' does not name a type

lcd.print(diceTwo);

^

dice_for_catan:59: error: expected unqualified-id before 'if'

if (diceOne + diceTwo == 7) {

^

dice_for_catan:67: error: expected unqualified-id before 'if'

if (diceOne + diceTwo == 5, 4, 3, 2, 6 ){

^

dice_for_catan:72: error: expected declaration before '}' token

}

^

exit status 1
case label '1' not within a switch statement

This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.
can someone help me with this code?
#include <LiquidCrystal.h>
LiquidCrystal lcd(8, 9, 4, 5, 6, 7);
#include <DFR_LCD_Keypad.h>
#include <AnalogDebounce.h>
int localKey = 1;
int count = 0;
long diceOne;
long diceTwo;
int countDelay = 220;
int setColumn = 0;
int SAMPLE_WAIT;
int KEY_SELECT;

void setup() {
lcd.begin(2, 16);
lcd.setCursor(8, 0);
lcd.print("Roll the dice!");

}


void buildUp() {
lcd.clear();
for (count = 0; count <= 16; count++) {
lcd.setCursor(setColumn, 0);
lcd.print(random(1, 7));
lcd.setCursor(setColumn, 1);
lcd.print(random(1, 7));
delay(countDelay);
countDelay -= 13;
setColumn += 1;
}
}

void loop() {
switch (KEY_SELECT);
case 1:
lcd.print("rolling dice");
break;

case 0:
do nothing
}


randomSeed(analogRead(0));

diceOne = random(1, 7);
diceTwo = random(1, 7);


buildUp();
lcd.clear();
lcd.setCursor(7, 0);
lcd.print(diceOne);
lcd.setCursor(7, 1);
lcd.print(diceTwo);

if (diceOne + diceTwo == 7) {
lcd.clear();
lcd.setCursor(7, 0);
lcd.print("7");
lcd.setCursor(3, 1);
lcd.print("The pirate");


if (diceOne + diceTwo == 5, 4, 3, 2, 6 ){
lcd.clear();
lcd.setCursor(7, 0);
lcd.print("5, 4, 3, 2, 6");
}
}
}
BTW I'm trying to make a digital dice to play catan dice

[robertsquires]

Have you done a video on using "namespace" ?

[skatefreak]

is it also possible to make a case for multiple cases like case 1 or 2:

[amelliamendel]

And the motor doesn't work... It prints to serial I'm here in this case and the motor doesn't start. How do you keep the motor running without a delay?

[dragonsocram]

I wanted your help on a project like SWITCH..case 0: (volts = xxx .. loop) push button changes to case 1: temperature = xxx ° c ... loop) on a lcd 20x4 or 16x2

[empaguia]

how to do that with a PIR Sensor returning only HIGH and LOW?
there is no MEDIUM there, I just want to turn on the led if high, off if "medium" and on if low'

[dajhonjosioechenique]

Excellent! ... but how do I do when the "case" is a string? I have a list of strings to execute a different function for each string...