Exiting Do while Loop using a key on the Keypad

Projects Programming
1

Greetings everyone, im trying to exit a "Do...While loop using the "B" key on my keypad".

this is the snippet of code:

if(customKey == "A"){

do{
gasDetector();
soundDetector();
}while(customKey != "B")
}

I've also tried it with condition "while(customKey == "B")" to exit the loop but it does not work.
the key "B" will ask me to re-enter the password then choose to arm (turn gas sensor and sound sensor on)system or disarm(turn both sensors off). but it just stays inside the loop until i take power off the arduino or press the reset button on the board.

2

If you want a responsive program then don't use WHILE. Just allow loop() to do the repetition and then you can check the I/O pins on every iteration of loop(). Have a look at how it is done in Several Things at a Time

...R

3

Suggest you avoid ‘while/do’ like a plague.

At a minimum, wait until you understand that while/do can often make your code very choppy.

4

The advice you've had about avoiding do/while is good advice.

Your problem here in particular is that nothing inside the loop changes the value of customKey. So once you enter the loop, you never leave.

5

The value of customKey never changes while your do/while loop is running, so expecting the do/while to ever end is unrealistic. You need to call getKey() now and then, in the body of the do/while loop. Or, as advised, get rid of it.