Arduino Distance Meter | Ultrasonic Sensor

 

Arduino Distance Meter | Ultrasonic Sensor (HC SR04)

Circuit diagram

Materials-:

1. Arduino
2. Ultra sonic sensor
3. Oled display
4. Bread board
5. Jumpers

Code-:

#include<SPI.h>

#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#define trigPin 9
#define echoPin 8
#define OLED_RESET 4
Adafruit_SSD1306 display(OLED_RESET);
void setup() {
Serial.begin (9600);
pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);
display.begin(SSD1306_SWITCHCAPVCC, 0x3C); //initialize with the I2C addr 0x3C (128x64)
display.clearDisplay();
}
void loop() {
float duration;
float distance_cm;
float distance_in;
digitalWrite(trigPin, LOW); //PULSE ___|---|___
delayMicroseconds(2);
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);
duration = pulseIn(echoPin, HIGH);
distance_cm = (duration/2) / 29.1;
distance_in = (duration/2) / 73.914;
display.setCursor(25,0); //oled display
display.setTextSize(1);
display.setTextColor(WHITE);
display.println("Distance Meter");
display.setCursor(10,20); //oled display
display.setTextSize(2);
display.setTextColor(WHITE);
display.println(distance_cm);
display.setCursor(90,20);
display.setTextSize(2);
display.println("cm");
display.setCursor(10,45); //oled display
display.setTextSize(2);
display.setTextColor(WHITE);
display.println(distance_in);
display.setCursor(90,45);
display.setTextSize(2);
display.println("in");
display.display();
delay(500);
display.clearDisplay();
Serial.println(distance_cm);
Serial.println(distance_in);
}