Measure Distance and More With HC-SR04 Ultrasonic Sensor

1
2#include <LiquidCrystal.h>  
3//#include <SoftwareSerial.h>
4
5LiquidCrystal  lcd(2, 3, 4, 5, 6, 7);   //LCD :  (rs, enable, d4, d5, d6, d7)
6//SoftwareSerial  mySerial(2, 3); // RX, TX
7
8const int trigPin = 12; // Trigger Pin of Ultrasonic  Sensor
9const int echoPin = 11; // Echo Pin of Ultrasonic Sensor
10
11void setup()  
12{
13Serial.begin(9600); // Starting Serial Terminal
14//mySerial.begin(9600);
15
16lcd.begin(16,2);                                                   
17pinMode(trigPin, OUTPUT);
18pinMode(echoPin,  INPUT);
19lcd.setCursor(0,0);
20lcd.print("  Distance    ");
21Serial.print("  Distance    ");
22lcd.setCursor(0,1);
23lcd.print("  Measurement  ");
24Serial.print("  Measurement  ");
25delay(1000);
26lcd.clear();
27lcd.setCursor(0,0);
28lcd.print("Made  By : ");
29delay(1000);
30Serial.print("Made By :");
31lcd.setCursor(0,0);
32lcd.print("OverAllTechnical");
33lcd.setCursor(0,1);
34lcd.print("Gyan");
35
36Serial.print("  OverAll Technical Gyan");
37delay(2000);
38lcd.clear();
39
40}
41
42void  loop()
43{
44  long duration, inches, cm;
45  pinMode(trigPin, OUTPUT);
46  digitalWrite(trigPin,  LOW);
47  delayMicroseconds(2);
48  digitalWrite(trigPin, HIGH);
49  delayMicroseconds(10);
50  digitalWrite(trigPin, LOW);
51
52  pinMode(echoPin, INPUT);
53  duration =  pulseIn(echoPin, HIGH);
54  inches = microsecondsToInches(duration);
55  cm =  microsecondsToCentimeters(duration);
56  
57//  Serial.print(inches);
58//  Serial.print("in,  ");
59
60Serial.print("Distance:");
61  Serial.print(cm);
62  Serial.print("cm");
63  delay(100);
64  Serial.println();
65lcd.setCursor(0,0);                                                 
66lcd.print("");
67delay(10);
68lcd.setCursor(0,1);
69lcd.print("Distance:");
70lcd.print(cm);
71lcd.print("cm");
72delay(100);
73//  mySerial.println(cm);
74//   mySerial.println("cm");
75//   mySerial.println();
76//   
77//  delay(100);
78}
79
80long microsecondsToInches(long microseconds)
81{
82  return microseconds / 74 / 2;
83}
84
85long microsecondsToCentimeters(long microseconds)
86{
87   return microseconds / 29 / 2;
88}

1
2#include <LiquidCrystal.h>  
3//#include <SoftwareSerial.h>
4
5LiquidCrystal
6  lcd(2, 3, 4, 5, 6, 7);   //LCD :  (rs, enable, d4, d5, d6, d7)
7//SoftwareSerial
8  mySerial(2, 3); // RX, TX
9
10const int trigPin = 12; // Trigger Pin of Ultrasonic
11  Sensor
12const int echoPin = 11; // Echo Pin of Ultrasonic Sensor
13
14void setup()
15  
16{
17Serial.begin(9600); // Starting Serial Terminal
18//mySerial.begin(9600);
19
20lcd.begin(16,2);
21                                                   
22pinMode(trigPin, OUTPUT);
23pinMode(echoPin,
24  INPUT);
25lcd.setCursor(0,0);
26lcd.print("  Distance    ");
27Serial.print("
28  Distance    ");
29lcd.setCursor(0,1);
30lcd.print("  Measurement  ");
31Serial.print("
32  Measurement  ");
33delay(1000);
34lcd.clear();
35lcd.setCursor(0,0);
36lcd.print("Made
37  By : ");
38delay(1000);
39Serial.print("Made By :");
40lcd.setCursor(0,0);
41lcd.print("OverAllTechnical");
42lcd.setCursor(0,1);
43lcd.print("Gyan");
44
45Serial.print("
46  OverAll Technical Gyan");
47delay(2000);
48lcd.clear();
49
50}
51
52void
53  loop()
54{
55  long duration, inches, cm;
56  pinMode(trigPin, OUTPUT);
57  digitalWrite(trigPin,
58  LOW);
59  delayMicroseconds(2);
60  digitalWrite(trigPin, HIGH);
61  delayMicroseconds(10);
62
63  digitalWrite(trigPin, LOW);
64
65  pinMode(echoPin, INPUT);
66  duration =
67  pulseIn(echoPin, HIGH);
68  inches = microsecondsToInches(duration);
69  cm =
70  microsecondsToCentimeters(duration);
71  
72//  Serial.print(inches);
73//  Serial.print("in,
74  ");
75
76Serial.print("Distance:");
77  Serial.print(cm);
78  Serial.print("cm");
79
80  delay(100);
81  Serial.println();
82lcd.setCursor(0,0);                                                 
83lcd.print("");
84delay(10);
85lcd.setCursor(0,1);
86lcd.print("Distance:");
87lcd.print(cm);
88lcd.print("cm");
89delay(100);
90//
91  mySerial.println(cm);
92//   mySerial.println("cm");
93//   mySerial.println();
94//
95   
96//  delay(100);
97}
98
99long microsecondsToInches(long microseconds)
100{
101
102  return microseconds / 74 / 2;
103}
104
105long microsecondsToCentimeters(long microseconds)
106{
107
108   return microseconds / 29 / 2;
109}