Arduino Based Blind Stick With GPS And GSM

step by step guide how you make your own blind stick with GPS And GSM

Prateek 08/12/2022

3 22,353 2 minutes read

Table of Contents

Introduction

Hi, Friends In this Blog You Learn All About Blind Stick Using GPS And GSM modules. I Will Explain All The Things In Detail about How the Project Will Work.

The main problem Of Blind People Is how to navigate their way to wherever they want to go. that’s such people need to blind Stick.to find out the correct path.
The blind people put the ultrasonic Sensor in a cap and then move. The ultrasonic sensor puts both sides front and back side, if the front ultrasonic sensor senses the obstacle the buzzer beeps which means it informs the Blind People is an obstacle in your front.
if blind people move backside and back side ultrasonic sensor sense the obstacle that’s the time buzzer beeps in a different sound. then blind people listen to the sound and know the buzzer beep sound is easy to understand where is come obstacle.
Now the blind people carry the stick I just put the water sensor on the downside of the stick. if stick goo in water they inform the blind people is some water is a downside and is easily understood. if blind people facing some problem then just press the push button that’s the time GSM Send the text message to the parent’s mobile number Or Police Station With a Proper GPS Location.

Bill Of Materials

Here I put All the Component List That I Used In this Project

S.N	Components	Quanitity	Link To Buy
1	Arduino Nano	1
2	GSM Sim800l Module	1
3	LM2596 Step Down Conveter	1
4	GPS Neo-6m	1
5	HC-SR 04 Ultersonic Sensor	1
6	Water Sensor	1
7	Push Button	1
8	Buzzer	1
9	Zero PCB	1

Hardware Part

In This Project, I used the Arduino nano microcontroller Board Because is Small And is providing the Soo many pins.

Arduino Nano Board

SIM800l Gsm module size is Also Small and Requires 3.7 volts only

RX Pin-Connected To The D2 Pin
Tx Pin-Connected To The D3 Pin

LM2596 is a step-down converter that converts the 9v or 12v Dc Supply To 3.7 volts and GSM sim800l is required for the 3.7-volt Supply.

GPS Neo-6m Module This is also in small size and they work on the 5v DC Supply
RX Pin-Connected To The D10 Pin
Tx Pin-Connected To The D11 Pin

HC-sr04 Ultrasonic Sensor In this project I used 2 ultrasonic sensors that work on the 5v DC Supply

1. Ultrasonic Sensor

Vcc 5v
Echo A0 Pin
Trig A1 Pin
Gnd Gnd

2. Ultrasonic Sensor

Vcc 5v
Echo A2 Pin
Trig A3 Pin
Gnd Gnd

The water Sensor also works on 5v if water touches the sensor that’s time sensor signal is High

VCC 5v
Signal A4
Gnd Gnd

Push Button they Connected To The Pin Number D6

The buzzer will be connected to the PIN D8

In this Project we Used The 4×4 Zero PCB I soldered All The Components In The zero PCB.

Circuit Diagram

This Circuit diagram I Make Of EasyEda Software If you want to make your Design just Visit The Site

With Buzzer

PCB Design

I hope You understand All The connections If you doubt anything Just Comment below on the blog I will try to explain them.

Source Code

Before You upload the code just add the lib

Now Select the proper Board And upload the Code.

//Prateek
//www.justdoelectronics.com
//https://www.youtube.com/@JustDoElectronics

#include <SoftwareSerial.h>
#include <TinyGPS++.h>

float lattitude, longitude;
float a[2];
float *p;
SoftwareSerial gpsSerial(2, 3);
SoftwareSerial gsmSerial(10, 11);
TinyGPSPlus gps;

const int trigPin1 = A1;
const int echoPin1 = A0;
long duration1;
int distance1;
const int trigPin2 = A2;
const int echoPin2 = A3;
long duration2;
int distance2;

int buttonpin = 6;

void setup() {
  pinMode(trigPin1, OUTPUT);
  pinMode(echoPin1, INPUT);
  pinMode(5, OUTPUT);
  pinMode(A4, INPUT_PULLUP);
  Serial.begin(9600);
  pinMode(trigPin2, OUTPUT);
  pinMode(echoPin2, INPUT);
  pinMode(buttonpin, INPUT_PULLUP);
  Serial.begin(9600);
  delay(1000);
  gpsSerial.begin(9600);
  delay(1000);
  gsmSerial.begin(9600);
  delay(1000);

  Serial.print("—Tracking–");
  Serial.print("***Location***");
  gsmSerial.println("AT+CNMI=2,2,0,0,0");
  delay(3000);
  Serial.print("Initializing……");
  delay(2000);
  Serial.print("System Ready  ");
  delay(1000);
}

void loop() {

  digitalWrite(trigPin1, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin1, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin1, LOW);
  duration1 = pulseIn(echoPin1, HIGH);
  distance1 = duration1 * 0.034 / 2;
  Serial.print("Distance1: ");
  Serial.println(distance1);
  digitalWrite(trigPin2, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin2, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin2, LOW);
  duration2 = pulseIn(echoPin2, HIGH);
  distance2 = duration2 * 0.034 / 2;
  Serial.print("Distance2: ");
  Serial.println(distance2);

  if (distance1 <= 20 || distance2 <= 20) {
    //Prateek
    //www.justdoelectronics.com
    //https://www.youtube.com/@JustDoElectronics

    digitalWrite(5, HIGH);
    delay(1000);
    digitalWrite(5, LOW);
    digitalWrite(5, HIGH);
    delay(1000);
    digitalWrite(5, LOW);
    digitalWrite(5, HIGH);
    delay(1000);
    digitalWrite(5, LOW);

  }

  else if (distance1 <= 15 || distance2 <= 15) {

    digitalWrite(5, HIGH);
    delay(500);
    digitalWrite(5, LOW);
    digitalWrite(5, HIGH);
    delay(500);
    digitalWrite(5, LOW);
    digitalWrite(5, HIGH);
    delay(500);
    digitalWrite(5, LOW);
  }

  else
    digitalWrite(5, LOW);
  int sensorValue = digitalRead(A4);

  if (sensorValue == 1) {

    digitalWrite(5, HIGH);
    Serial.println("Rain Alert");
    delay(1500);
    digitalWrite(5, LOW);
    digitalWrite(5, HIGH);
    delay(1500);
  }

  else
    digitalWrite(5, LOW);
  if (digitalRead(buttonpin) == LOW) {
    Serial.println("button pressed");
    delay(2000);
    SendMessage();
  }
  if (gsmSerial.available() > 0)
    Serial.write(gsmSerial.read());
  while (gsmSerial.available()) {
    gsmSerial.read();
  }

  while (Serial.available()) {
    Serial.read();
  }
  get_gsm();
}
float *get_gps() {
  gpsSerial.listen();
  Serial.println("INSIDE get_gps");
  while (1) {
    while (gpsSerial.available() > 0) {
      gps.encode(gpsSerial.read());
    }
    if (gps.location.isUpdated()) {
      //Prateek
      //www.justdoelectronics.com
      //https://www.youtube.com/@JustDoElectronics

      Serial.print("LAT=");
      Serial.println(gps.location.lat(), 6);
      Serial.print("LONG=");
      Serial.println(gps.location.lng(), 6);
      lattitude = gps.location.lat();
      longitude = gps.location.lng();
      break;
    }
  }
  a[0] = lattitude;
  a[1] = longitude;
  return a;
}

void get_gsm() {
  gsmSerial.listen();
  while (gsmSerial.available() > 0)
  //Prateek
  //www.justdoelectronics.com
  //https://www.youtube.com/@JustDoElectronics

  {
    Serial.println("INSIDE gsmSerial.available");
    if (gsmSerial.find("Track")) {
      Serial.println("INSIDE track");
      gsmSerial.println("AT+CMGF=1");
      delay(1000);
      gsmSerial.println("AT+CMGS=\"+9188305848xx\"\r");
      delay(1000);
      p = get_gps();
      gsmSerial.listen();
      Serial.print("Your Location: ");
      gsmSerial.print("Your Location: ");

      Serial.print("LATTITUDE=");
      Serial.print(*p, 6);

      gsmSerial.print("LATTITUDE=");
      gsmSerial.print(*p, 6);
      gsmSerial.print(",");

      Serial.print("LONGITUDE=");
      Serial.print(*(p + 1), 6);

      gsmSerial.print("LONGITUDE=");
      gsmSerial.print(*(p + 1), 6);
      delay(100);
      gsmSerial.println((char)26);
      delay(1000);
    }
  }
}

void SendMessage() {
  gsmSerial.println("AT+CMGF=1");
  delay(1000);
  gsmSerial.println("AT+CMGS=\"+9188305848xx\"\r");
  delay(1000);
  gsmSerial.println("I Am In Problem Plz Help Me");
  delay(1000);
  p = get_gps();
  gsmSerial.listen();
  Serial.print("Your Position is : ");
  gsmSerial.print("position is : ");
  Serial.print("LATTITUDE=");
  Serial.print(*p, 6);
  gsmSerial.print("LATTITUDE=");
  gsmSerial.print(*p, 6);
  gsmSerial.print(",");
  Serial.print("LONGITUDE=");
  Serial.print(*(p + 1), 6);
  gsmSerial.print("LONGITUDE=");
  gsmSerial.print(*(p + 1), 6);
  delay(100);
  //Prateek
  //www.justdoelectronics.com
  //https://www.youtube.com/@JustDoElectronics

  gsmSerial.println((char)26);
}

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//Prateek

//www.justdoelectronics.com

//https://www.youtube.com/@JustDoElectronics

#include <SoftwareSerial.h>

#include <TinyGPS++.h>

float lattitude, longitude;

float a[2];

float *p;

SoftwareSerial gpsSerial(2, 3);

SoftwareSerial gsmSerial(10, 11);

TinyGPSPlus gps;

const int trigPin1 = A1;

const int echoPin1 = A0;

long duration1;

int distance1;

const int trigPin2 = A2;

const int echoPin2 = A3;

long duration2;

int distance2;

int buttonpin = 6;

void setup() {

pinMode(trigPin1, OUTPUT);

pinMode(echoPin1, INPUT);

pinMode(5, OUTPUT);

pinMode(A4, INPUT_PULLUP);

Serial.begin(9600);

pinMode(trigPin2, OUTPUT);

pinMode(echoPin2, INPUT);

pinMode(buttonpin, INPUT_PULLUP);

Serial.begin(9600);

delay(1000);

gpsSerial.begin(9600);

delay(1000);

gsmSerial.begin(9600);

delay(1000);

Serial.print("—Tracking–");

Serial.print("***Location***");

gsmSerial.println("AT+CNMI=2,2,0,0,0");

delay(3000);

Serial.print("Initializing……");

delay(2000);

Serial.print("System Ready ");

delay(1000);

}

void loop() {

digitalWrite(trigPin1, LOW);

delayMicroseconds(2);

digitalWrite(trigPin1, HIGH);

delayMicroseconds(10);

digitalWrite(trigPin1, LOW);

duration1 = pulseIn(echoPin1, HIGH);

distance1 = duration1 * 0.034 / 2;

Serial.print("Distance1: ");

Serial.println(distance1);

digitalWrite(trigPin2, LOW);

delayMicroseconds(2);

digitalWrite(trigPin2, HIGH);

delayMicroseconds(10);

digitalWrite(trigPin2, LOW);

duration2 = pulseIn(echoPin2, HIGH);

distance2 = duration2 * 0.034 / 2;

Serial.print("Distance2: ");

Serial.println(distance2);

if (distance1 <= 20 || distance2 <= 20) {

//Prateek

//www.justdoelectronics.com

//https://www.youtube.com/@JustDoElectronics

digitalWrite(5, HIGH);

delay(1000);

digitalWrite(5, LOW);

digitalWrite(5, HIGH);

delay(1000);

digitalWrite(5, LOW);

digitalWrite(5, HIGH);

delay(1000);

digitalWrite(5, LOW);

}

else if (distance1 <= 15 || distance2 <= 15) {

digitalWrite(5, HIGH);

delay(500);

digitalWrite(5, LOW);

digitalWrite(5, HIGH);

delay(500);

digitalWrite(5, LOW);

digitalWrite(5, HIGH);

delay(500);

digitalWrite(5, LOW);

}

else

digitalWrite(5, LOW);

int sensorValue = digitalRead(A4);

if (sensorValue == 1) {

digitalWrite(5, HIGH);

Serial.println("Rain Alert");

delay(1500);

digitalWrite(5, LOW);

digitalWrite(5, HIGH);

delay(1500);

}

else

digitalWrite(5, LOW);

if (digitalRead(buttonpin) == LOW) {

Serial.println("button pressed");

delay(2000);

SendMessage();

}

if (gsmSerial.available() > 0)

Serial.write(gsmSerial.read());

while (gsmSerial.available()) {

gsmSerial.read();

}

while (Serial.available()) {

Serial.read();

}

get_gsm();

}

float *get_gps() {

gpsSerial.listen();

Serial.println("INSIDE get_gps");

while (1) {

while (gpsSerial.available() > 0) {

gps.encode(gpsSerial.read());

}

if (gps.location.isUpdated()) {

//Prateek

//www.justdoelectronics.com

//https://www.youtube.com/@JustDoElectronics

Serial.print("LAT=");

Serial.println(gps.location.lat(), 6);

Serial.print("LONG=");

Serial.println(gps.location.lng(), 6);

lattitude = gps.location.lat();

longitude = gps.location.lng();

break;

}

a[0] = lattitude;

a[1] = longitude;

return a;

}

void get_gsm() {

gsmSerial.listen();

while (gsmSerial.available() > 0)

//Prateek

//www.justdoelectronics.com

//https://www.youtube.com/@JustDoElectronics

{

Serial.println("INSIDE gsmSerial.available");

if (gsmSerial.find("Track")) {

Serial.println("INSIDE track");

gsmSerial.println("AT+CMGF=1");

delay(1000);

gsmSerial.println("AT+CMGS=\"+9188305848xx\"\r");

delay(1000);

p = get_gps();

gsmSerial.listen();

Serial.print("Your Location: ");

gsmSerial.print("Your Location: ");

Serial.print("LATTITUDE=");

Serial.print(*p, 6);

gsmSerial.print("LATTITUDE=");

gsmSerial.print(*p, 6);

gsmSerial.print(",");

Serial.print("LONGITUDE=");

Serial.print(*(p + 1), 6);

gsmSerial.print("LONGITUDE=");

gsmSerial.print(*(p + 1), 6);

delay(100);

gsmSerial.println((char)26);

delay(1000);

}

void SendMessage() {

gsmSerial.println("AT+CMGF=1");

delay(1000);

gsmSerial.println("AT+CMGS=\"+9188305848xx\"\r");

delay(1000);

gsmSerial.println("I Am In Problem Plz Help Me");

delay(1000);

p = get_gps();

gsmSerial.listen();

Serial.print("Your Position is : ");

gsmSerial.print("position is : ");

Serial.print("LATTITUDE=");

Serial.print(*p, 6);

gsmSerial.print("LATTITUDE=");

gsmSerial.print(*p, 6);

gsmSerial.print(",");

Serial.print("LONGITUDE=");

Serial.print(*(p + 1), 6);

gsmSerial.print("LONGITUDE=");

gsmSerial.print(*(p + 1), 6);

delay(100);

//Prateek

//www.justdoelectronics.com

//https://www.youtube.com/@JustDoElectronics

gsmSerial.println((char)26);

}

Now I have tested the code is working Properly you just change your mobile number

Here You Put Your Mobile Number

gsmSerial.println("AT+CMGS=\"+9188305848xx\"\r"); 
delay(1000); 
gsmSerial.println("I Am In Problem Plz Help Me");

gsmSerial.println("AT+CMGS=\"+9188305848xx\"\r");

delay(1000);

gsmSerial.println("I Am In Problem Plz Help Me");

Project Demo

Video

Sensor

3 Comments

Anonymous says:

18/08/2024 at 3:50 pm

is it that we have to put sim for gsm
Ashlyn says:

29/09/2024 at 8:33 pm

Can we use any type of gsm module? And can you say any easier alternatives for step down converter, pls say fast I have a competition
Prateek says:

30/09/2024 at 11:43 am

yes

Introduction

Bill Of Materials

Hardware Part

Circuit Diagram

PCB Design

Source Code

Project Demo

Video

Prateek

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