Interfacing of Soil-Moisture Sensor with Arduino, Blynk, Bluetooth

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Interfacing of Soil-Moisture Sensor with Arduino, Blynk, Bluetooth

Components Required:

Hardware Required:

  • Arduino UNO and Cell-Phone
  • OTG Cable
  • Arduino Cable
  • Soil-Moisture Sensor
  • Sample Soil
  • Bluetooth HC-05 Module
  • Jumper Wires

 

Software Required:

  • Arduino-Droid App in Cell-Phone
  • Blynk App in Cell-Phone

 

Circuit Diagram:

Connection-between-Arduino-bluetooth-and-Soil-Moisture-Sensor

 

Connections:

 

Connection Arduino and Bluetooth module

Arduino Bluetooth Module
Digital Pin 10  Tx
Digital Pin 11  Rx
5V/3.3V VCC
Ground(GND)  GND

 

Connection Arduino and Soil Moisture Sensor

Arduino Soil Moisture Sensor
Analog Pin A0  A0
5V/3.3V VCC
Ground(GND)  GND

 

Steps to Follow:

  1. Make the Circuit-Connections as shown above.
  2. Open Arduino Droid App.
  3. Paste the Code written in the Code-Section.
  4. First Compile(try to remove comments if you get error) and then Upload the code to Arduino.
  5. Now open Blynk App.
    Blynk-Android-App-User-InterfaceImage Credit: Blynk Documentation
  6. Open Widget Box in Blynk App by touching (+) icon in the Upper-Right Corner.
    Blynk-App-And-Select-Plus-Button
  7. Choose Value Display by clicking on it and now set the Virtual Pin 1.
    Select-Blynk-App-value-display-option

    Select-the-value-of-display-virtual-pin
  8. Now similarly choose Bluetooth Button. (To know how to set it please refer Annexure).
    Choose-Bluetooth-element-from-blynk-app
  9. Click play button and now you can read your Soil-Moisture Sensor Reading in the Blynk App.

Code:

#define BLYNK_PRINT Serial 
#include <SoftwareSerial.h>

SoftwareSerial SwSerial(10, 11); // RX, TX

const int sensor_pin = A0; /* Soil moisture sensor O/P pin */ 
float moisture_percentage;

int sensor_analog;

#include <BlynkSimpleSerialBLE.h> 
#include <SoftwareSerial.h>

BlynkTimer timer; // Announcing the timer

// You should get Auth Token in the Blynk App.

// Go to the Project Settings (nut icon).

char auth[] = "0efba9ac0b3f48daa6473567a34f4e00"; (Your Auth. Code)

SoftwareSerial SerialBLE(10, 11); // RX, TX void myTimerEvent()

{

Blynk.virtualWrite(V1,moisture_percentage);

delay(100);

}

void setup()

{

// Debug console 
Serial.begin(9600); 
pinMode(sensor_pin, INPUT);
SerialBLE.begin(9600);
Blynk.begin(SerialBLE, auth);

timer.setInterval(1000L, myTimerEvent);
Serial.println("Waiting for connections...");

}

void loop()

{

moisture_percentage = analogRead(sensor_pin); 
moisture_percentage = map(moisture_percentage,1023,150,0,100);
delay(1000);

Blynk.run();

timer.run();

// You can inject your own code or combine it with other sketches.

// Check other examples on how to communicate with Blynk. Remember

// to avoid delay() function!

}

 

Similar Challenges:

1. Automatic Plant Watering System.

2. Rain Alert System

 

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