Description

Baby Monitoring System

We are very well familiar with the hurdles faced by Parents to nurture their infant and especially in case if both the Parents are working. So, we found the need to develop something unique that can help Parents to have a continuous surveillance on the baby and can notify about the same. Thus, we have come up with an idea to design a Baby Monitoring System which will help the Parents to monitor their child even if they are away from home. The design uses the technologies which include GSM module, cry detection mechanism, temperature sensing mechanism and motion detection mechanism. Measurements of these vital parameters can be done easily and can be conveyed to the parents.

Problem Statement

At present, female participation in the workforce in the industrialized nations has greatly increased, thereby affecting infant care in many families. Both parents are required to work due to the high cost of living. However, they still need to look after their babies, thereby increasing workload and stress, especially for the mother. Working parents cannot always care for their babies. They either send their babies to their parents or hire a baby caregiver while they are working. Some parents worry about the safety of their babies in the care of others. Thus, they go home to check on their babies during their free time, such as lunch or tea break. A baby monitoring system that can monitor the babies’ condition real time is proposed to solve these problems.

This proposed system is an innovative, smart & protective system to nurture an infant in an efficient way. This system considers all the minute details required for the care & protection of the Baby. These days people seem to be always in a rush with their work and they may not be able to monitor the child all the time. The baby monitoring system is a kind of alarm system which can detect baby movements and activities . In the proposed system baby monitoring has been designed and developed using PIR motion sensor, temperature sensor. The baby's sound, like crying, is detected by a sound sensor. If the temperature rises, the sensor detects it. It is detected and sent to parents. The system operates at a voltage range of 12V and the sensors provide data with an accuracy of ±1% . The proposed system provides an easier and convenient way for busy parents to take care of their babies.

PROBLEM STATEMENT

As we are very well familiar with the hurdles faced by Parents to nurture their infant and

especially in case if both the Parents are working. To give 24 hours of time in such cases is

next to impossible. So, we need to develop something unique that can help Parents to have a

continuous surveillance on the baby and can notify about the same. Thus, we have come up

with an idea to design a Baby Monitoring System which will help the Parents to monitor their

child even if they are away from home. The design uses the technologies which include

GSM module, cry detection mechanism, temperature sensing mechanism and motion

detection mechanism. Measurements of these vital parameters can be done easily and can be

conveyed to the parents.

MATERIALS REQUIRED

Hardware

Jumper wire
Bread board
Arduino uno
SIM 900A
Sound sensor
PIR motion sensor
DHT 11

Software

Arduino IDE
Fritzing

Flowchart

STEP 1 : FOLLOW THE CIRCUIT DIAGRAM

STEP 2 : USE THE CODE

Code is provided at the bottom of the page

TEST PLAN BLOCK DIAGRAM

DESIRED OUTPUT

Code

CODE

C/C++

#include "arduinoFFT.h" #define SAMPLES 128 //SAMPLES-pt FFT. Must be a base 2 number. Max 128 for Arduino Uno. #define SAMPLING_FREQUENCY 1024 //Ts = Based on Nyquist, must be 2 times the highest
expected frequency. arduinoFFT FFT = arduinoFFT();

unsigned int samplingPeriod;
unsigned long microSeconds;

double vReal[SAMPLES]; //create vector of size SAMPLES to hold real values
double vImag[SAMPLES]; //create vector of size SAMPLES to hold imaginary values

#include<SoftwareSerial.h>
SoftwareSerial gsm(2,3);

#include "DHT.h" #define DHTPIN 4 // Digital pin connected to the DHT sensor
#define DHTTYPE DHT11 // DHT 11
DHT dht(DHTPIN, DHTTYPE);

const int pirPin = 5;
int pirState = LOW;

8

unsigned long previousMillis = 0; // will store last time LED was updated
const long interval = 10000; // interval at which to blink (milliseconds)
int motionCount = 0;

void setup() {
Serial.begin(9600);
samplingPeriod = round(1000000*(1.0/SAMPLING_FREQUENCY)); //Period in microseconds
gsm.begin(9600);
dht.begin();
pinMode(pirPin, INPUT);
}

void loop() {
double soundPeak = readSoundData();
Serial.print(F("soundPeak: "));
Serial.println(soundPeak);
Serial.print("__");

pirState = digitalRead(pirPin);
Serial.print(F("pirState: "));
Serial.println(pirState);
Serial.print("__");

float temp = getTemprature();
float humid = getHumidity();

if(soundPeak>800){
makeCall();

9

}

unsigned long currentMillis = millis();
if(pirState==HIGH){
motionCount++;
Serial.println();
Serial.println();
Serial.println("motionCount: ");
Serial.println(motionCount);
Serial.println();
Serial.println();
if (currentMillis - previousMillis >= interval) {
motionCount=0;
previousMillis = currentMillis;
}

if(motionCount>2){
sendMessage(temp, humid);
}
}

delay(300);
}

double readSoundData(){
//Sample SAMPLES times/
double reading = 0;

10
for(int i=0; i<SAMPLES; i++)
{
microSeconds = micros(); //Returns the number of microseconds since the Arduino board
began running the current script. vReal[i] = analogRead(0); //Reads the value from analog pin 0 (A0), quantize it and save it as
a real term. reading = vReal[i];
vImag[i] = 0; //Makes imaginary term 0 always
//remaining wait time between samples if necessary/
while(micros() < (microSeconds + samplingPeriod))
{
//do nothing
}
}

//Perform FFT on samples/
FFT.Windowing(vReal, SAMPLES, FFT_WIN_TYP_HAMMING, FFT_FORWARD);
FFT.Compute(vReal, vImag, SAMPLES, FFT_FORWARD);
FFT.ComplexToMagnitude(vReal, vImag, SAMPLES);

//Find peak frequency and print peak/
double peak=FFT.MajorPeak(vReal, SAMPLES, SAMPLING_FREQUENCY);
Serial.print(F("Frequency: "));
Serial.println(peak);
Serial.print("__");
return reading;
}

11

float getTemprature(){
// Read temperature as Celsius (the default)
float t = dht.readTemperature();

// Check if any reads failed and exit early (to try again). if (isnan(t)) {
Serial.println(F("Failed to read from DHT sensor!"));
return 0;
}

return t;
}

float getHumidity(){
float h = dht.readHumidity();

// Check if any reads failed and exit early (to try again). if (isnan(h)) {
Serial.println(F("Failed to read from DHT sensor!"));
return 0;
}

return h;
}

void sendMessage(float temp, float humid){
Serial.println(F("Sending message"));

12

gsm.println("AT+CMGF=1");
delay(1000);
gsm.println("AT+CMGS=\"+916235207024\"\r"); //replace x by your number
delay(1000);
gsm.println("Baby is moving");
delay(100);
gsm.print("Temprature: ");
delay(100);
gsm.println(String(temp, 1));
delay(100);
gsm.print("Humidity: ");
delay(100);
gsm.println(String(humid, 1));
delay(100);
gsm.println((char)26);
delay(2000);
}

void makeCall(){
Serial.println(F("Sending call"));
gsm.println("ATD+916235207024;"); //replace x by your number
delay(100);
gsm.println("ATH");
delay(1000);
}

Schematic and Layout

IMAGE

Screenshot 2022-09-27 205125.png