Reaction time game help

[dkdldod]

Hi, I'm trying to make a reaction game that chooses a random time when I press a button and when the time runs out I want to display a message on an LCD that I see and then press the button as fast as possible. Here comes the tricky part I want to display the time it took me before I pressed the button and display it in seconds and milliseconds on the LCD.
This is the code so far:

#include <Adafruit_LiquidCrystal.h>

Adafruit_LiquidCrystal lcd(0);

int randy;
int stat = LOW;
int stats = LOW;

void setup() {
  lcd.begin(16, 2);
  pinMode(1, INPUT_PULLUP);
  pinMode(2, INPUT_PULLUP);
}

void loop() {
  float T = 0;
  if (digitalRead(1) == LOW) {
    randy = random(500, 2000);
    stat = !stat;
    lcd.clear();
    delay(50);
  }
  while (stat == HIGH) {
    randy--;
  }
  if (randy <= 1) {
    lcd.setCursor(3, 1);
    lcd.print("PRESS NOW!!");
    delay(100);
    lcd.clear();
  }
  while (randy <= 1 && digitalRead(2) == HIGH) {
    T++;
    lcd.setCursor(3, 2);
    lcd.print(T);
  }
}  

Now not to confuse anyone this is how I want the circuit to ideally look like:

[PaulRB]

@dkdldod

pinMode(1, INPUT_PULLUP);

You have plenty of spare pins on the Uno. Don't use pin 1, that's needed for uploading your sketch and debugging it using serial monitor.

[dkdldod]

Thanks didn't know that

[dkdldod]

#include <Adafruit_LiquidCrystal.h>

Adafruit_LiquidCrystal lcd(0);

int randy;
int stat = LOW;
int stats = LOW;

void setup() {
  lcd.begin(16, 2);
  pinMode(7, INPUT_PULLUP);
  pinMode(6, INPUT_PULLUP);
}

void loop() {
  float T = 0;
  if (digitalRead(1) == LOW) {
    randy = random(500, 2000);
    stat = !stat;
    lcd.clear();
    delay(50);
  }
  while (stat == HIGH) {
    randy--;
  }
  if (randy <= 1) {
    lcd.setCursor(3, 1);
    lcd.print("PRESS NOW!!");
    delay(100);
    lcd.clear();
  }
  while (randy <= 1 && digitalRead(2) == HIGH) {
    T++;
    lcd.setCursor(3, 2);
    lcd.print(T);
  }
}  

[J-M-L]

@dkdldod

Thanks didn't know that

@dkdldod

if (digitalRead(1) == LOW) {

Seems you are listening but not taking input into account…

[J-M-L]

@dkdldod

while (stat == HIGH) {
    randy--;
  }

How long do you think you’ll stay in this while loop?

[dkdldod]

I think I have fixed all the issues in the code but yet it still doesn't work

#include <Adafruit_LiquidCrystal.h>

Adafruit_LiquidCrystal lcd(0);

int randy;

void setup() {
  lcd.begin(16, 2);
  pinMode(6, INPUT_PULLUP);
  pinMode(7, INPUT_PULLUP);
  lcd.setCursor(1, 0);
  lcd.print("Loading");
  delay(1000);
  lcd.clear();
}

void loop() {
  float T = 0;
  if (digitalRead(6) == LOW) {
    randy = random(500, 2000);
    lcd.clear();
    delay(50);
  }
  while (randy <= 500) {
    randy--;
  }
  if (randy <= 1) {
    lcd.setCursor(3, 1);
    lcd.print("PRESS NOW!!");
    delay(100);
    lcd.clear();
  }
  while (randy <= 1 && digitalRead(7) == HIGH) {
    T++;
  }
  if (randy <= 1 && digitalRead(7) == LOW) {
    lcd.setCursor(3, 2);
    lcd.print(T);
  }
}

[J-M-L]

@dkdldod

    randy = random(500, 2000);

so randy is above or at 500

➜ how many iteration do you expect to have with such a test?

@dkdldod

while (randy <= 500) {
    randy--;
  }

the delay(100); won't help either...

--

what you want to do

• delay() for a random number of ms
• check if the button is pressed, if it is, the player pressed ahead of time so loses
• display the message to press now
• record the value of micros() in an unsigned long t0 variable
• keep reading the button's state until it's pressed
• record the value of micros() in an unsigned long t1 variable

➜ the ∆t = t1 - t0 is the reaction time

[dkdldod]

well, I want a delay for a random number of seconds then display a message that tells me to press the button and counts the time it took me before I pressed the button and shows it.

[J-M-L]

exactly what I said - something like this

unsigned long t0, t1, deltaT;
delay(random(1000, 5001)); // wait between 1s and 5s
if (digitalRead(6) == HIGH) {
  lcd.clear(); 
  lcd.setCursor(3, 1);
  lcd.print(F("NOW!!"));
  t0 = micros();
  while (digitalRead(6) == HIGH); // wait for the button press
  t1 = micros();
  deltaT =(t1 - t0) / 1000;
  // here deltaT is your reaction time in ms
  ... do something with it
} else {
  // player pressed too early
  ...
}

[dkdldod]

Thanks this helped a lot ive fixed some of the code and it works as expected

[J-M-L]

as a curtesy for other visitors of the forum, post your full solution. It can help others

have fun!