1. long readUltrasonicDistance(int triggerPin, int echoPin)
2. {
3.     pinMode(triggerPin, OUTPUT);  // Clear the trigger
4.     digitalWrite(triggerPin, LOW);
5.     delayMicroseconds(2);
6.     // Sets the trigger pin to HIGH state for 10 microseconds
7.     digitalWrite(triggerPin, HIGH);
8.     delayMicroseconds(10);
9.     digitalWrite(triggerPin, LOW);
10.     pinMode(echoPin, INPUT);
11.     // Reads the echo pin, and returns the sound wave travel time in microseconds
12.     return pulseIn(echoPin, HIGH);
13. }
14.  
15. void setup()
16. {
17.     Serial.begin(9600);
18.  
19.     pinMode(12, OUTPUT);
20.     pinMode(8, OUTPUT);
21.     pinMode(5, OUTPUT);
22. }
23.  
24. void loop()
25. {
26.     Serial.println(0.01723 * readUltrasonicDistance(4, 3));
27.   if (0.01723 * readUltrasonicDistance(4, 3) < 70) {
28.         digitalWrite(12, HIGH);
29.         digitalWrite(8, LOW);
30.         digitalWrite(5, LOW);
31.   } else {
32.     if (0.01723 * readUltrasonicDistance(4, 3) < 150) {
33.             digitalWrite(12, LOW);
34.             digitalWrite(8, HIGH);
35.             digitalWrite(5, LOW);
36.     } else {
37.             digitalWrite(12, LOW);
38.             digitalWrite(8, LOW);
39.             digitalWrite(5, HIGH);
40.     }
41.   }
42.     delay(10); // Delay a little bit to improve simulation performance
43. }
44.  
45. ----------------------------------------------------------
46.  
47. const int UltrasonikTrig1 = 11;
48. const int UltrasonikEcho1 = 12;
49. const int Indikator = 10;
50.  
51. void setup() {
52.     Serial.begin(9600);
53.     pinMode(UltrasonikTrig1, OUTPUT);  
54.     pinMode(UltrasonikEcho1, INPUT);
55.     pinMode(Indikator, OUTPUT);
56. }
57. long duration1;
58. long cm1;
59.  
60. void loop()
61. {
62.     digitalWrite(UltrasonikTrig1, LOW);
63.     digitalWrite(UltrasonikTrig1, HIGH);
64.     delayMicroseconds(10);
65.    
66.     digitalWrite(UltrasonikTrig1, LOW);
67.     duration1 = pulseIn(UltrasonikEcho1, HIGH);
68.     cm1 = microsecondsKeCenti(duration1);
69.     Serial.print("Sensor 1 : ");
70.     Serial.print(cm1);
71.     Serial.print(" cm");
72.     Serial.print(" || ");
73.    // if the distance less than 100 cm / 1 meter
74.     if (cm1 <= 100)
75.     {
76.           digitalWrite(Indikator, HIGH);
77.     }
78.     else
79.     {
80.           digitalWrite(Indikator, LOW);
81.           Serial.print(" Save");
82.     }
83.     Serial.println(" || ");
84.     delay(100);
85. }
86. long microsecondsKeCenti(long microseconds)
87. {
88.     return microseconds / 29 / 2;
89. }
90.  
91. -------------------------------------
92.  
93. #include <LiquidCrystal.h>
94.  
95. const int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
96. LiquidCrystal lcd(rs, en, d4, d5, d6, d7);
97. int inches = 0;
98.  
99. float cm = 0;
100.  
101. long readUltrasonicDistance(int triggerPin, int echoPin)
102. {
103.     pinMode(triggerPin, OUTPUT);  // Clear the trigger
104.     digitalWrite(triggerPin, LOW);
105.     delayMicroseconds(2);
106.     // Sets the trigger pin to HIGH state for 10 microseconds
107.     digitalWrite(triggerPin, HIGH);
108.     delayMicroseconds(10);
109.     digitalWrite(triggerPin, LOW);
110.     pinMode(echoPin, INPUT);
111.     return pulseIn(echoPin, HIGH);
112. }
113.  
114. void setup()
115. {
116.   lcd.begin(16, 2);
117. }
118. void loop()
119. {
120.     // measure the ping time in cm
121.     cm = 0.01723 * readUltrasonicDistance(7, 7);
122.     // set up the LCD's number of columns and rows:
123.    
124.     // Print a message to the LCD.
125.     lcd.print("Distance:");
126.     lcd.setCursor(0, 1);
127.     lcd.print(cm);
128.     delay(1000); // Wait for 100 millisecond(s)
129.     lcd.clear();
130.    
131.    
132. }
133.  
134.  
135.  
136.  
137.  
138.  
139.  
140.  
141.