Description
Step 1: Scheme
Step 2: Arduino IDE libraries
Step 3: Google Firebase
Step 4: NodeMCU
Step 5: DHT11 sensor
Step 6: Soil moisture sensor
Step 7: MQ-135 sensor
Step 8: Android application
My GreenHouse Monitoring System

Published February 21, 2019 © GPL3+

GreenHouse Monitoring System

Android application monitoring system for GreenHouse, several sensors for reading data and send to application.

IntermediateFull instructions provided10 hours34,504

Things used in this project

Hardware components

NodeMCU ESP8266 Breakout Board

DHT11 Temperature & Humidity Sensor (3 pins)

SparkFun Soil Moisture Sensor (with Screw Terminals)

Seeed Studio Grove - Gas Sensor(MQ2)

Li-Ion Battery 1000mAh

Arduino Nano R3

Software apps and online services

Arduino IDE

Android Studio

Google Firebase

Story

Description:

This project helps you to look at your greenhouse. It consists of sensors:

DHT11 (temperature and humidity),
MQ-135 (Air Quality),
Soil Moisture.

GreenHouse Montoring System

- The next few steps will explain how to make the system.

Step 1: Scheme

1 / 2 • Scheme: Connect NodeMCU and sensors

DHT11 sensor data pin is connected to NodeMCU via D0 pin.
Soil Moisture sensor data pin is connected to NodeMCU via D1 pin.
MQ-135 sensor data pin is connected to NodeMCU via A0 pin.
VCC pin on sensors is connect to VIN pin on NodeMCU and GND pin is connect to GND pin on NodeMCU.

Step 2: Arduino IDE libraries

- The required libraries are:

Step 3: Google Firebase

Google Firebase serves to store data collected on the NodeMCU. These datas can be further used on websites, mobile applications and anywhere they can access the Internet. Sign in using your Google Account and follow the steps below.

After login follow the next steps:

Click on "+ Add project"
Fill information and click "Create"
After loading, click "Develop" in left navigation bar. Then click "Database"
Click "Create database" then check "Start in test mode" and click "Enable"
Next to "Database" title in the drop-down menu, select "Realtime Database"
Click on "Roles" tab. In code delete "false" and add "true".
Back to "Data" tab. Copy link of your database and insert in Arduino code.
Click on icon gear (left navigation bar) choose "Projects settings" and click on "Service accounts" choose "Database secrets".
On right copy "Secret" code and insert in Arduino code.

Now, we've connected NodeMCU and Google Firebase.

Step 4: NodeMCU

NodeMCU

NodeMCU is a board that has the ability to connect to the Internet. In addition, there are several digital pins and one analog pin. It is excellent for projects that need to connect to the Internet.
The code required to connect to the Internet and connect to Google Firebase is shown below:

#include <PubSubClient.h>
#include <FirebaseArduino.h>
#include <ESP8266WiFi.h>
#include <ArduinoJson.h>
#define FIREBASE_HOST "firebase_link"
#define FIREBASE_AUTH "firebase_secretcode"
  
#define WIFI_SSID "wifi_name"
#define WIFI_PASSWORD "wifi_password"
  
  
void setup() {
 Serial.begin(9600);
    WiFi.begin (WIFI_SSID, WIFI_PASSWORD);
       while (WiFi.status() != WL_CONNECTED) {
          delay(500);
           Serial.print(".");
        }
         Serial.println ("");
         Serial.println ("WiFi Connected!");
         Serial.println(WiFi.localIP());
    Firebase.begin(FIREBASE_HOST, FIREBASE_AUTH);
}
void loop() {
  
}

Step 5: DHT11 sensor

DHT11 Sensor

- Connecting the dhtnew.h library and pin to which the data pin of the sensor is connected is done using the following command:

int dhtPin = 0;
DHTNEW dhtsensor(dhtPin);

- Reading the temperature and humidity is done using this command:

dhtsensor.read();
float t = dhtsensor.temperature;
float h = dhtsensor.humidity;

- Finally sending data to Google Firebase is done with using this command:

Firebase.setFloat("t", t);
Firebase.setFloat("h", h);

Step 6: Soil moisture sensor

Soil Moisture sensor

- The intialization of the pin for read value of soil moisture data is done with using this command:

int soilPin = 1;

Reading data and sending to Google Firebase is done with using this commands:

int soilData = digitalRead(soilPin);
Firebase.setInt("soilData", soilData);

Step 7: MQ-135 sensor

MQ-135 sensor

- The intialization of the pin for read value of air quality data is done with using this command:

int airPin = A0;

- Reading data and sending to Google Firebase is done with using this commands:

int airData = analogRead(airPin);
Firebase.setInt("airData", airData);

Step 8: Android application

1 / 2 • GreenHouse application

The application was created in the android studio. The part that connects the app from Google Firebase from where the sensor data is taken from is shown below.
For Temperature, Humidity and Air Quality:

dref = FirebaseDatabase.getInstance().getReference();
       dref.addValueEventListener(new ValueEventListener() {
           @Override
           public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
               temp = dataSnapshot.child("t").getValue().toString();
               text_temperature.setText(temp + "°C");
           }
           @Override
           public void onCancelled(@NonNull DatabaseError databaseError) {
           }
       });
       dref = FirebaseDatabase.getInstance().getReference();
       dref.addValueEventListener(new ValueEventListener() {
           @Override
           public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
               hum = dataSnapshot.child("h").getValue().toString();
               text_humidity.setText(hum + "%");
           }
           @Override
           public void onCancelled(@NonNull DatabaseError databaseError) {
           }
       });
       dref = FirebaseDatabase.getInstance().getReference();
       dref.addValueEventListener(new ValueEventListener() {
           @Override
           public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
               air = dataSnapshot.child("airData").getValue().toString();
               text_airquality.setText(air);
           }
           @Override
           public void onCancelled(@NonNull DatabaseError databaseError) {
           }
       });

- For Soil Moisture(if-else is used to decides whether watering is necessary or not):

dref = FirebaseDatabase.getInstance().getReference();
       dref.addValueEventListener(new ValueEventListener() {
           @Override
           public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
               soilmoisture = dataSnapshot.child("soilData").getValue().toString();
               int soilData = Integer.parseInt(soilmoisture);
               if (soilData == 0) {
                   text_soilmoisture.setText("No watering required.");
                   text_soilmoisture.setTextColor(col2);
               }
            else {
                   text_soilmoisture.setText("Watering required!");
                   text_soilmoisture.setTextColor(col1);
               }
           }
           @Override
           public void onCancelled(@NonNull DatabaseError databaseError) {
           }
       });

- Part of the code for linking text that is written in activity_main.xml (displayed in the application) and Google Firebase is in attachments with name MainActivity.java. Also the xml file is in attachments.

My GreenHouse Monitoring System

1 / 3 • Box with electronics

Power for my system is power bank. Power bank + is connect to VIN on NodeMCU and - is connect to GND on NodeMCU.

Code

#include <PubSubClient.h>
#include <FirebaseArduino.h>
#include <ESP8266WiFi.h>
#include <ArduinoJson.h>
#include <dhtnew.h>

#define FIREBASE_HOST "firebase_link"
#define FIREBASE_AUTH "firebase_secret"

#define WIFI_SSID "wifi_name"
#define WIFI_PASSWORD "wifi_password"

int soilPin = 5, airPin = A0, dhtPin = 16;

DHTNEW dhtsensor(dhtPin);

void setup() {
  //Serial Begin at 9600 Baud 
  pinMode(soilPin, INPUT);
  pinMode(airPin, INPUT);
  
  Serial.begin(9600);
     WiFi.begin (WIFI_SSID, WIFI_PASSWORD);
        while (WiFi.status() != WL_CONNECTED) {
           delay(500);
            Serial.print(".");
  
         }
          Serial.println ("");
          Serial.println ("WiFi Connected!");
          Serial.println(WiFi.localIP());
     Firebase.begin(FIREBASE_HOST, FIREBASE_AUTH);


  
}

void loop() {

int soilData = digitalRead(soilPin);
Firebase.setInt("soilData", soilData);

int airData = analogRead(airPin);
Firebase.setInt("airData", airData);

dhtsensor.read();
float t = dhtsensor.temperature;
float h = dhtsensor.humidity;
Firebase.setFloat("t", t);
Firebase.setFloat("h", h);


delay(2000);




}

package com.example.elmin.plastenik;

import android.graphics.Color;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.Button;
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 {


    DatabaseReference dref;
    TextView text_temperature, text_humidity, text_airquality, text_soilmoisture;
    String temp, hum, air, soilmoisture;
    int col1 = Color.parseColor("#b32d00"), col2 = Color.parseColor("#000000");

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        text_temperature = (TextView) findViewById(R.id.textTemp);
        text_airquality = (TextView) findViewById(R.id.textAir);
        text_humidity = (TextView) findViewById(R.id.textHum);
        text_soilmoisture = (TextView) findViewById(R.id.textSoil);



        dref = FirebaseDatabase.getInstance().getReference();
        dref.addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(@NonNull DataSnapshot dataSnapshot) {

                temp = dataSnapshot.child("t").getValue().toString();
                text_temperature.setText(temp + "C");

            }

            @Override
            public void onCancelled(@NonNull DatabaseError databaseError) {

            }
        });


        dref = FirebaseDatabase.getInstance().getReference();
        dref.addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(@NonNull DataSnapshot dataSnapshot) {

                hum = dataSnapshot.child("h").getValue().toString();
                text_humidity.setText(hum + "%");

            }

            @Override
            public void onCancelled(@NonNull DatabaseError databaseError) {

            }
        });

        dref = FirebaseDatabase.getInstance().getReference();
        dref.addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(@NonNull DataSnapshot dataSnapshot) {

                air = dataSnapshot.child("airData").getValue().toString();
                text_airquality.setText(air);
              
                }

            @Override
            public void onCancelled(@NonNull DatabaseError databaseError) {

            }
        });

        dref = FirebaseDatabase.getInstance().getReference();
        dref.addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(@NonNull DataSnapshot dataSnapshot) {

                soilmoisture = dataSnapshot.child("soilData").getValue().toString();
                int soilData = Integer.parseInt(soilmoisture);


                if (soilData == 0) {

                    text_soilmoisture.setText("No watering required.");
                    text_soilmoisture.setTextColor(col2);

                }
             else {
                    text_soilmoisture.setText("Watering required!");
                    text_soilmoisture.setTextColor(col1);
                }

            }

            @Override
            public void onCancelled(@NonNull DatabaseError databaseError) {

            }
        });
    }
}

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">


  <RelativeLayout
      android:layout_width="match_parent"
      android:layout_height="75dp"
      android:layout_marginTop="10dp"
      android:layout_marginLeft="20dp"
      android:layout_marginRight="20dp"
      android:background="#f3f4ee">
      <TextView
          android:layout_width="150dp"
          android:layout_height="40dp"
          android:layout_marginTop="15dp"
          android:layout_marginLeft="50dp"
          android:textSize="16dp"
          android:gravity="center"
          android:text="Temperature"
          android:textColor="#000000"
          android:alpha="0.8"/>
      <ImageView
          android:layout_width="40dp"
          android:layout_height="40dp"
          android:layout_marginLeft="5dp"
          android:layout_marginTop="15dp"
          android:src="@drawable/temperature"
          android:alpha="0.8"/>
        <TextView
            android:id="@+id/textTemp"
            android:layout_width="150dp"
            android:layout_height="50dp"
            android:layout_marginTop="10dp"
            android:layout_marginLeft="200dp"
            android:gravity="center"
            android:textSize="40dp"
            android:text="N/A"
            android:textColor="#000000"
            android:alpha="0.8"
            />
  </RelativeLayout>


    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="75dp"
        android:layout_marginTop="95dp"
        android:layout_marginLeft="20dp"
        android:layout_marginRight="20dp"


        android:background="#f3f4ee">
        <TextView
            android:layout_width="150dp"
            android:layout_height="40dp"
            android:layout_marginTop="15dp"
            android:layout_marginLeft="50dp"
            android:textSize="16dp"
            android:gravity="center"
            android:text="Humidity"
            android:textColor="#000000"
            android:alpha="0.8"/>
        <ImageView
            android:layout_width="40dp"
            android:layout_height="40dp"
            android:layout_marginLeft="10dp"
            android:layout_marginTop="15dp"
            android:src="@drawable/humidity"
            android:alpha="0.8"/>
        <TextView
            android:id="@+id/textHum"
            android:layout_width="150dp"
            android:layout_height="50dp"
            android:layout_marginTop="10dp"
            android:layout_marginLeft="200dp"
            android:gravity="center"
            android:textSize="40dp"
            android:text="N/A"
            android:textColor="#000000"
            android:alpha="0.8"
            />
    </RelativeLayout>



    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="120dp"
        android:layout_marginLeft="20dp"
        android:layout_marginRight="20dp"
        android:layout_marginTop="180dp"
        android:layout_marginBottom="20dp"
        android:background="#f3f4ee"
        >
        <ImageView
            android:layout_width="80dp"
            android:layout_height="80dp"
            android:layout_marginLeft="20dp"
            android:layout_marginTop="25dp"
            android:src="@drawable/soil"
            android:alpha="0.8"/>
        <TextView
            android:id="@+id/textSoil"
            android:layout_width="200dp"
            android:layout_height="match_parent"
            android:layout_marginTop="10dp"
            android:layout_marginBottom="10dp"
            android:layout_marginLeft="130dp"
            android:gravity="center"
            android:textAlignment="center"
            android:textSize="25dp"
            android:text="N/A"
            android:textColor="#000000"
            android:alpha="0.8"
            />

    </RelativeLayout>

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="180dp"
        android:layout_marginLeft="20dp"
        android:layout_marginRight="20dp"
        android:layout_marginTop="310dp"
        android:layout_marginBottom="20dp"
        android:background="#f3f4ee"
        >
        <TextView
            android:layout_width="90dp"
            android:layout_height="40dp"
            android:layout_marginTop="30dp"
            android:layout_marginLeft="55dp"
            android:textSize="16dp"
            android:gravity="center"
            android:text="Air Quality"
            android:textColor="#000000"
            android:alpha="0.8"/>
        <ImageView
            android:layout_width="40dp"
            android:layout_height="40dp"
            android:layout_marginLeft="5dp"
            android:layout_marginTop="30dp"
            android:src="@drawable/airquality"
            android:alpha="0.8"/>
        <TextView
            android:id="@+id/textAir"
            android:layout_width="150dp"
            android:layout_height="50dp"
            android:layout_marginTop="90dp"
            android:textAlignment="center"
            android:textSize="40dp"
            android:text="N/A"
            android:textColor="#000000"
            />
        <ImageView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_marginLeft="150dp"
            android:src="@drawable/kvalitetazraka"/>
    </RelativeLayout>


</RelativeLayout>

Credits

Elmin Delibašić

12 projects • 81 followers

Bachelor of Electrical Engineering || Enthusiast for AI and IoT || Master Student at Faculty of Electrical Engineering

GreenHouse Monitoring System

Things used in this project

Hardware components

Software apps and online services

Story

Description:

Step 1: Scheme

Step 2: Arduino IDE libraries

Step 3: Google Firebase

Step 4: NodeMCU

Step 5: DHT11 sensor

Step 6: Soil moisture sensor

Step 7: MQ-135 sensor

Step 8: Android application

My GreenHouse Monitoring System

Schematics

Scheme

Code

nodemcu.ino

MainActivity.java

activity_main.xml

Credits

Elmin Delibašić

Comments

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GreenHouse Monitoring System

GreenHouse Monitoring System

Things used in this project

Hardware components

Software apps and online services

Story

Description:

Step 1: Scheme

Step 2: Arduino IDE libraries

Step 3: Google Firebase

Step 4: NodeMCU

Step 5: DHT11 sensor

Step 6: Soil moisture sensor

Step 7: MQ-135 sensor

Step 8: Android application

My GreenHouse Monitoring System

Schematics

Scheme

Code

nodemcu.ino

MainActivity.java

activity_main.xml

Credits

Elmin Delibašić

Comments

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