Height Tracker

1#include <LiquidCrystal.h> 
2
3LiquidCrystal lcd(12, 11, 5, 4, 3, 2); 
4
5const int fixedDistance = 190;  // Fixed distance from sensor to ground in cm
6const int trigPin = 9;
7const int echoPin = 10;
8
9
10// Variables for distance calculation
11long duration;  // Time taken for the ultrasonic wave to return
12float distance;  // Calculated distance in centimeters
13float height;     // Calculated height in centimeters 
14
15void setup() {
16  lcd.begin(16,2);
17  Serial.begin(9600);   // Initialize serial communication for debugging
18  pinMode(trigPin, OUTPUT); // Set the trig pin as output
19  pinMode(echoPin, INPUT);  // Set the echo pin as input
20  delay(500);
21}
22
23void loop() {
24  // Clear the trigPin
25  digitalWrite(trigPin, LOW);
26  delayMicroseconds(2);
27
28  // Send a 10 microsecond pulse to trigger the sensor
29  digitalWrite(trigPin, HIGH);
30  delayMicroseconds(10);
31  digitalWrite(trigPin, LOW);
32
33  // Measure the duration of the pulse from echoPin
34  duration = pulseIn(echoPin, HIGH);
35
36  // Calculate distance in centimeters (speed of sound: 343 m/s -> 0.0343 cm/microsecond)
37  distance = duration * 0.0343 / 2;
38
39  // Calculate height relative to the fixed distance
40  height = fixedDistance - distance;
41
42  
43  lcd.setCursor(3,0);
44  lcd.print("Your HEIGHT");
45  lcd.setCursor(4,1);
46  lcd.print(height);
47  lcd.print("cm ");
48  lcd.setCursor(0,1);
49  delay(500);
50}