Automated Rail Crossing System | Sheekar Banerjee

CircuitPlanning:

ArduinotoUltrasonicSensor

Arduino-----> HC-SR04

Vin -----> Vcc

GND -----> GND

Digital 2 -----> trigPin

Digital 3 -----> echoPin

ArduinotoServoMotor

Arduino -----> Servo Motor

Vin -----> Red wire (+)

GND -----> Black or Dark wire (-)

Digital pin 9 -----> Yellow/Orange wire (data)

Code:

//the code is entirely created by: SHEEKAR BANERJEE (at December 2017)
//Dept. of CSE, IUBAT
//AI-ML-IOT Solution Engineer and Researcher


#include<Servo.h>  //This calls the Header of the repository containing the library files of Servo Motor Driver Modules

#define trigPin 2  //This initializes the Trig pin of HC-05 Ultrasonic Sensor to the pin no. 2 of Arduino Microcontroller

#define echoPin 3 //This initializes the Echo pin of HC-05 Ultrasonic Sensor to the pin no. 3 of Arduino Microcontroller

Servo sm;     //Servo is a Class which is providing an independent data type // sm is a variable which is representing the servo motor

int sound=250;

void setup() {
Serial.begin(9600); //Streaming 9600 bits of sensor data per second

pinMode(trigPin,OUTPUT); //Here, Trig pin triggers the electrical impulses into the sensor as an output

pinMode(echoPin,INPUT);  //Here, Echo pin inputs the reflective signals into the sensor

sm.attach(9);   //Servo motor data pin is attached to Arduino Digital Pin 9 
}

void loop() {
 long duration, distance;
 digitalWrite(trigPin, LOW);
 delayMicroseconds(2);        // It will wait for 2 microseconds after every single electrical implulse of Trig pin if it is sending LOW(less than 1.6V) signal
 
digitalWrite(trigPin, HIGH); 
delayMicroseconds(10);       //It will wait for 10 microseconds after every single electrical implulse of Trig pin if it is sending HIGH(greater than 1.6V) signal
digitalWrite(trigPin, LOW);
 
duration=pulseIn(echoPin, HIGH);  //Sensor inputs the signal through the Echo pin
 
distance=(duration/2)/29.1;       //Calculation of distance
if(distance<10)    //According to the reflection time calculation, if the distance is less than 10 cm  
{
  sm.write(80);      
}
else { 
  sm.write(0); //The Servo Motor will rotate for 80 degrees     
} 
}

Results: