[Arduino] buttonWait - wait for button press before further execution.

1_details.txt

buttonWait v0.1 by rahuldottech
---------------------------------
(pause a script till a button is, y'know, *pressed*...)

This code is in the public domain.

Proper schematic at https://arduino.stackexchange.com/a/56805/50258

--

Circuit Diagram:

[pin]----|--------------[button]
         |                 |
   [10k resistor]          |
         |                 |
     [ground]            [vcc]
--

Usage:

buttonWait(<pin_number>);

2_code.ino

/* the function */
void buttonWait(int buttonPin){
  int buttonState = 0;
  while(1){
    buttonState = digitalRead(buttonPin);
    if (buttonState == HIGH) {
      return;
    }
  }
}


void loop() {
  // put your main code here, to run repeatedly:
  buttonWait(2); // wait for button press on pin 2
  // do something
  // ...
}

3_example.ino

/* the function */
void buttonWait(int buttonPin){
  int buttonState = 0;
  while(1){
    buttonState = digitalRead(buttonPin);
    if (buttonState == HIGH) {
      return;
    }
  }
}

void setup() {
  // put your setup code here, to run once:
  pinMode(LED_BUILTIN, OUTPUT); // initialize digital pin LED_BUILTIN as an output.
}

void loop() {
  // put your main code here, to run repeatedly:
  buttonWait(2); // wait for button press on pin 2
  digitalWrite(LED_BUILTIN, HIGH);   // turn the LED on
  delay(1000); //wait for a second
  buttonWait(2); // wait for another button press on pin 2
  digitalWrite(LED_BUILTIN, LOW);   // turn the LED off
  delay(1000); //wait for a second
}

Hey there. I'm trying to use your function to enter an autocalibration program for a sensor.

I successfully made an LCD print some welcome text once the button was pressed.

buttonWait(8);

some code to initialize the calibration process.

However, when I enter another buttonWait(8) to continue (the user will keep pushing the button to continue the process), the first function executes.

Basically, it's as if I can't run 2 buttonWait functions simultaneously. Here is my code.

`void loop() {

while (digitalRead(buttonPin) == HIGH) {

Serial.println("Esperando");
lcd.setCursor(0, 0);
lcd.print("Esperando");

}
buttonWait(8);
lcd.setCursor(0,0);
lcd.print("Calibremos");
lcd.setCursor(0,1);
lcd.print("el sensor");
delay(10000);

buttonWait(8);
lcd.clear();
lcd.setCursor(0,0);
lcd.print("Sumerja");
lcd.setCursor(0,1);
lcd.print("en agua");
`

Any insights on why this happens?? Thank you.

What I'm trying to achieve is a sequential process that advances with each pressing of the same button.

Hey, I'm so sorry for the delayed response. I took a cursory glance, and your code looks okay to me, I don't know why that would be happening.

Did you manage to figure it out?

Hey, yes I figured out! Thank you

how did you solve it?