Problem on my coding with sw420 vibration sensor

Using Arduino Programming Questions
#1

Hi all,

I am trying to make a reaction timer with a sw420 vibration sensor. however, I am stuck my programming.
Here is my code:

#include <LiquidCrystal.h>
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
const int Sensor = A4;
int count = 0;
int val;
long measurement = pulseIn (Sensor, HIGH); //wait for the pin to get HIGH and returns measurement
const int buttonPin1 = A2;
const int ledPin2 = 7;
const int ledPin = 6;
const int buzzerPin = 10;
float reaction = 0;
float reaction2 = 0;
int timeDelay, timeNumber;


void setup() {
  // put your setup code here, to run once:
  pinMode(Sensor, INPUT);
  Serial.begin(9600);
  lcd.begin(16, 2);
  pinMode(buttonPin1, INPUT);
  pinMode(buzzerPin, OUTPUT);
  pinMode(Sensor, INPUT);
  pinMode(ledPin, OUTPUT);
  pinMode(ledPin2, OUTPUT);

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Boxing");
  lcd.setCursor(0, 1);
  lcd.print("Punch Reaction");
  delay(2000);
  lcd.clear();
  delay(1000);
}

void loop() {
  lcd.clear();
  lcd.print("Please set the");
  lcd.setCursor(0, 1);
  lcd.print("Countdown");
  delay(500);
  lcd.clear();


  while (digitalRead(buttonPin1) == HIGH) //while you not press START
  {
    if (digitalRead(buttonPin1) == LOW) //if start is pressed
    {
      analogWrite(10, 50);
      delay(100);
      analogWrite(10, 0);
      delay(100);
      analogWrite(10, 50);
      delay(200);
      analogWrite(10, 0);
      lcd.print("Get ready");
      delay(2000);
      lcd.clear();
      timeNumber = random(1, 5);//generates a number between 1 and 5
      timeDelay = timeNumber * 1000;//times this number by 1000 to get the time in milliseconds
      delay(timeDelay);//delay the program by this time period

      lcd.print("Punch Me");
      digitalWrite(ledPin, HIGH);//turn on the led
      //tone(buzzerPin, 1000, 1);//trigger the buzzer
      analogWrite(10, 50);
      delay(500);
      analogWrite(10, 0);
      lcd.clear();

      do {
        delay(1);
        reaction++;
        long measurement = pulseIn (Sensor, HIGH);
        Serial.println(measurement);
      } while (measurement > 1000);
      {
        reaction = reaction / 1000;
        digitalWrite(ledPin, LOW);
        lcd.setCursor(0, 0);
        lcd.print(reaction);
        delay(3000);
        lcd.clear();

      }
    }
  }
}
  1. The button won’t react directly, I need to hold it for around 5 second to start the timer.
  2. the (measurement>1000) part seems to be not working, the timer stops right after the “punch me” part finishes.

Please help me… This is my first project with Arduino and I really can’t find what is wrong, been trying it for days.

#2

To make the code more responsive, you need to get rid of all the calls to delay().
Look at the blink without delay example code in the IDE for clues how to do this.

#3

thank you for replying, I will try delete the delays

For this part,

do {
        delay(1);
        reaction++;
        long measurement = pulseIn (Sensor, HIGH);
        Serial.println(measurement);
      } while (measurement > 1000);
      {
        reaction = reaction / 1000;
        digitalWrite(ledPin, LOW);
        lcd.setCursor(0, 0);
        lcd.print(reaction);

Do you have idea why its not working?

#4

Do you have idea why its not working?

You have two variables named measurement. Which one is the while statement evaluating?

#5

Can i get the connection of coding sir

#6