Published October 28, 2017 © GPL3+

A Crib for the Care of Babies with Android Remote Alert

A device for baby crib that measures parameters such as temperature, humidity or others, whit monitoring using firebase on Android.

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A Crib for the Care of Babies with Android Remote Alert

Things used in this project

Hardware components

NodeMCU ESP8266 Breakout Board

DHT11 Temperature & Humidity Sensor (4 pins)

Android device

Software apps and online services

Google Firebase

Google Android Things

Story

In the world, millions of babies are born to day. A baby needs special care, things like humidity, temperature, danger moves, and others, are important factors for a healthy baby. In this project we measure humidity and temperature from a cot of a baby, this is possible using a DHT11 then, we use a NODE MCU for upload the data to Firebase, the parents can supervise your baby in a Android App that generates notifications when the data are not secure for the baby, in the same app, the parents can modificate the threshold for a secure range.

Send Data to Firebase

DHT conection

Using the NodeMcu we upload the data to a project in firebase and they may see like the next image:

When we create a project in firebase to facilitate the use we need follow the next steps:

Click on 'Database':

Click on 'Rules' (I'm from Colombia, that's why it's in Spanish):

Delete and write this:

Now we don't require authorization for editing data, but, we'll need an auth code for our library in NODE MCU, for this, in the project configuration click on 'service accounts' then, in 'Secrets of the Database', finally click on 'To Show' and copy the code.

In this moment we use the code for Arduino IDE and programming the NODE MCU whit each your data (ssid, password, firebaseurl, auth). (Attached is the application code)

Android App

In Android Studio, we'll make an app for download the data of sensors and established the secure range, when the data are out of secure range, the app generates an notification. (Attached is the application code)

The following image shows the application:

App

The sensor data is updated in every second and shows in the up of the app, in the bottom, the parents can modify the value of the ranges and this values also upload to firebase:

The app compares the sensor data with the range and if the data are out of range the app will generates a notification:

And this is the end, this is a short project make for protect our babies.

Code

package nedzib.firebaseuno;

import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Intent;
import android.provider.MediaStore;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.app.NotificationCompat;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Log;
import android.widget.EditText;
import android.widget.TextView;

import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.ValueEventListener;

public class MainActivity extends AppCompatActivity {
    EditText eth,ett,humin,humax,temin,temax;
    int hmi=0,hma=0,tmi=0,tma=0;
    //Notification
    NotificationCompat.Builder noti;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        //
        final int notid=001;
        noti=
                (NotificationCompat.Builder) new NotificationCompat.Builder(this)
                        .setSmallIcon(android.R.drawable.ic_dialog_alert)
                        .setContentTitle("Baby Care")
                        .setSound(MediaStore.Audio.Media.INTERNAL_CONTENT_URI, 6)
                        .setContentText("Data outside of secure limits");
        //
        Intent resultIntent = new Intent(this, MainActivity.class);
        PendingIntent resultPendindIntent=
                PendingIntent.getActivity(
                        this,
                        0,
                        resultIntent,
                        PendingIntent.FLAG_UPDATE_CURRENT
                );
        noti.setContentIntent(resultPendindIntent);
        //
        final NotificationManager notima=
                (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
        //
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        eth=(EditText)findViewById(R.id.editText);
        ett=(EditText)findViewById(R.id.editText2);
        humin=(EditText)findViewById(R.id.ethmi);
        humax=(EditText)findViewById(R.id.ethma);
        temin=(EditText)findViewById(R.id.ettmi);
        temax=(EditText)findViewById(R.id.ettma);
        FirebaseDatabase  Datab=FirebaseDatabase.getInstance();
        ///Principal Lectures
        DatabaseReference  ref=Datab.getReference("Humidity");
        DatabaseReference  ref1=Datab.getReference("Temperature");
        //threshold lectures
        final DatabaseReference  tmin=Datab.getReference("tmin");
        final DatabaseReference  tmax=Datab.getReference("tmax");
        final DatabaseReference  hmin=Datab.getReference("hmin");
        final DatabaseReference  hmax=Datab.getReference("hmax");
        //Single Listen Threshold From Firebase
        hmin.addListenerForSingleValueEvent(new ValueEventListener() {
            @Override
            public void onDataChange(DataSnapshot dataSnapshot) {
                hmi=dataSnapshot.getValue(Integer.class);
                humin.setText(Integer.toString(hmi));
            }

            @Override
            public void onCancelled(DatabaseError databaseError) {
                Log.e("ERROR", databaseError.getMessage());
            }
        });
        hmax.addListenerForSingleValueEvent(new ValueEventListener() {
            @Override
            public void onDataChange(DataSnapshot dataSnapshot) {
                int hma=dataSnapshot.getValue(Integer.class);
                humax.setText(Integer.toString(hma));
            }

            @Override
            public void onCancelled(DatabaseError databaseError) {
                Log.e("ERROR", databaseError.getMessage());
            }
        });
        tmin.addListenerForSingleValueEvent(new ValueEventListener() {
            @Override
            public void onDataChange(DataSnapshot dataSnapshot) {
                int tmi=dataSnapshot.getValue(Integer.class);
                temin.setText(Integer.toString(tmi));
            }

            @Override
            public void onCancelled(DatabaseError databaseError) {
                Log.e("ERROR", databaseError.getMessage());
            }
        });
        tmax.addListenerForSingleValueEvent(new ValueEventListener() {
            @Override
            public void onDataChange(DataSnapshot dataSnapshot) {
                int tma=dataSnapshot.getValue(Integer.class);
                temax.setText(Integer.toString(tma));
            }

            @Override
            public void onCancelled(DatabaseError databaseError) {
                Log.e("ERROR", databaseError.getMessage());
            }
        });
        //EditText Listener and Send to Firebase
        humin.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
            }

            @Override
            public void afterTextChanged(Editable s) {
                hmi=Integer.parseInt(humin.getText().toString());
                hmin.setValue(hmi);
            }
        });
        humax.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {

            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {

            }

            @Override
            public void afterTextChanged(Editable s) {
                hma=Integer.parseInt(humax.getText().toString());
                hmax.setValue(hma);
            }
        });
        temin.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {

            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {

            }

            @Override
            public void afterTextChanged(Editable s) {
                tmi=Integer.parseInt(temin.getText().toString());
                tmin.setValue(tmi);
            }
        });
        temax.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {

            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {

            }

            @Override
            public void afterTextChanged(Editable s) {
                tma=Integer.parseInt(temax.getText().toString());
                tmax.setValue(tma);
            }
        });
        //EventListener Value read from Firebase
        ref.addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(DataSnapshot dataSnapshot) {
                int h = dataSnapshot.getValue(Integer.class);
                eth.setText(Integer.toString(h));
                if (h<hmi || h>hma){
                    notima.notify(notid, noti.build());}
            }
            @Override
            public void onCancelled(DatabaseError databaseError) {
                Log.e("ERROR", databaseError.getMessage());
            }
        });
        ref1.addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(DataSnapshot dataSnapshot) {
                int t = dataSnapshot.getValue(Integer.class);
                ett.setText(Integer.toString(t));
                if (t<tmi || t>tma){
                    notima.notify(notid, noti.build());}
            }

            @Override
            public void onCancelled(DatabaseError databaseError) {
                Log.e("ERROR", databaseError.getMessage());
            }
        });

    }
}

#include <ESP8266WiFi.h>
#include <DHT.h>
#include <FirebaseArduino.h>

// Uncomment whatever type you're using!
#define DHTTYPE DHT11   // DHT 11
//#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321
//#define DHTTYPE DHT21   // DHT 21 (AM2301)
 
// Connect pin 1 (on the left) of the sensor to +5V
// NOTE: If using a board with 3.3V logic like an Arduino Due connect pin 1
// to 3.3V instead of 5V!
// Connect pin 2 of the sensor to whatever your DHTPIN is
// Connect pin 4 (on the right) of the sensor to GROUND
// Connect a 10K resistor from pin 2 (data) to pin 1 (power) of the sensor


const char* ssid = "**********";  //your ssid
const char* pass = "**********"; //your password

const char* base       = "myurl.firebaseio.com"; //your URL project Firebase
const char* auth       = "***************"; //your Auth password

const int DHTPin = 10;     // what digital pin we're connected to
 
DHT dht(DHTPin, DHTTYPE);
 
void setup() {
   Serial.begin(9600);
   dht.begin();
   Firebase.begin(base, auth);
}
 
void loop() {
    /////////////////////////////Conect to WiFi//////////
  Serial.print("Conect to: "); 
  Serial.println(ssid);
  WiFi.begin(ssid, pass);
 
  while (WiFi.status() != WL_CONNECTED) {
    delay(100);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("Conected");
  
 while(true){
   delay(10);
 
   float h = dht.readHumidity();
   float t = dht.readTemperature();
 
//   if (isnan(h) || isnan(t)) {
//      Serial.println("Failed to read from DHT sensor!");
//      return;
//   }
 
   Serial.print("\nHumidity: ");
   Serial.print(h);
   Serial.print(" %\t");
   Serial.print("Temperature: ");
   Serial.print(t);
   
   Firebase.setInt("Humidity", h);
          if (Firebase.failed()) {
            Serial.print("failed");
            Serial.println(Firebase.error()); 
            return;
          }else{Serial.println("\nVar Ok ");}


      Firebase.setInt("Temperature", t);
          if (Firebase.failed()) {
            Serial.print("failed");
            Serial.println(Firebase.error()); 
            return;
          }else{Serial.println("Var Ok");}
}}

Credits

Nedzib Sastoque Rangel

6 projects • 13 followers

#UDistrital Electronics student, I love programming, domotic, create prototypes and learn new things

A Crib for the Care of Babies with Android Remote Alert

Things used in this project

Hardware components

Software apps and online services

Story

Send Data to Firebase

Android App

Schematics

DHT Conection

Code

Android App

NodeMCU Code

Credits

Nedzib Sastoque Rangel

Comments

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A Crib for the Care of Babies with Android Remote Alert

A Crib for the Care of Babies with Android Remote Alert

Things used in this project

Hardware components

Software apps and online services

Story

Send Data to Firebase

Android App

Schematics

DHT Conection

Code

Android App

NodeMCU Code

Credits

Nedzib Sastoque Rangel

Comments

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