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					/*

 * Program for Blind Man Stick

 * Code by B.Aswinth Raj

 * Dated: 03-11-2017

 * Website: www.behnamrobotic.com

 */


const int trigger = 3; //Trigger pin of 1st Sesnor

const int echo = 2; //Echo pin of 1st Sesnor

const int Buzz = 13; //Echo pin of 1st Sesnor

const int Remote = A0; //Echo pin of 1st Sesnor

const int Light = A1; //Echo pin of 1st Sesnor


long time_taken;

int dist;

int Signal;

int Intens;

int similar_count;



void setup() {

Serial.begin(9600); 

pinMode(Buzz,OUTPUT);

digitalWrite(Buzz,LOW);

pinMode(trigger, OUTPUT); 

pinMode(echo, INPUT); 


}


/*###Function to calculate distance###*/

void calculate_distance(int trigger, int echo)

{

digitalWrite(trigger, LOW);

delayMicroseconds(2);

digitalWrite(trigger, HIGH);

delayMicroseconds(10);

digitalWrite(trigger, LOW);


time_taken = pulseIn(echo, HIGH);

dist= time_taken*0.034/2;

if (dist>300)

dist=300;

}


void loop() { //infinite loopy

calculate_distance(trigger,echo);

Signal = analogRead(Remote);

Intens = analogRead(Light);


//Check if Remote is pressed

int temp = analogRead(Remote);

similar_count=0;

while (Signal==temp)

{

 Signal = analogRead(Remote);

 similar_count++;

}


//If remote pressed

if (similar_count<100)

{

  Serial.print(similar_count); Serial.println("Remote Pressed");

  digitalWrite(Buzz,HIGH);delay(3000);digitalWrite(Buzz,LOW);

}


//If very dark

if (Intens<200)

{

  Serial.print(Intens); Serial.println("Bright Light");

  digitalWrite(Buzz,HIGH);delay(200);digitalWrite(Buzz,LOW);delay(200);digitalWrite(Buzz,HIGH);delay(200);


  digitalWrite(Buzz,LOW);delay(200);

  delay(500);

}


//If very bright

if (Intens>800)

{

  Serial.print(Intens); Serial.println("Low Light");

  digitalWrite(Buzz,HIGH);delay(500);digitalWrite(Buzz,LOW);delay(500);digitalWrite(Buzz,HIGH);delay(500);


  digitalWrite(Buzz,LOW);delay(500);

}


if (dist<50)

{

  Serial.print(dist); Serial.println("Object Alert");

  

  digitalWrite(Buzz,HIGH);

  for (int i=dist; i>0; i--)

    delay(10);


  digitalWrite(Buzz,LOW);

  for (int i=dist; i>0; i--)

    delay(10);

    

}


//Serial.print("dist=");

//Serial.println(dist);

//Serial.print("Similar_count=");

//Serial.println(similar_count);

//Serial.print("Intens=");

//Serial.println(Intens);

}