Published May 31, 2019

Home Automation Using Mobile App

Control your home applications using a mobile phone.

IntermediateProtip1,861

Things used in this project

Hardware components

NodeMCU ESP8266 Breakout Board

ControlEverything.com 4-CHANNEL RELAY CONTROLLER FOR I2C

9V battery (generic)

Software apps and online services

Arduino IDE

Blynk

Story

Step 1: Blynk

Download the Blynk app from google play store
Sign in using a valid E-mail address
Create a new project
Give a project name and choose NodeMCU from choose device dropdown list.
Then choose Wi-Fi from connection type dropdown list and press Create.
An Auth Token will be generated and send to the E-mail address which you signed in.
Copy and save the Auth Token somewhere safe, We will use it in the next step DO NOT share it, anyone who is having it can control your device.
Now click on the "+" symbol to add widgets, then add a Button. Now you can see a button will be added to the dashboard.
Click on the Button widget from the dashboard to edit the button settings.
Now from the settings choose the pin which you want to control, I'm choosing digital pin D5
Change the ON state to 0 and OFF state to 1, by default ON will be 1 ie HIGH and OFF will be 0 ie LOW. We are doing this because Our relay will turn ON on LOW and turn OFF on HIGH.
Change the mode to switch instead of push.

Step 2: NodeMCU

We are going to program NodeMCU with Arduino IDE.

open node mcu blynk code File In Arduino IDE.

Then paste the AuthToken generated from Blynk app to the Blynk Arduino sketch.
Type your WiFi SSID and Password also to the Blynk Arduino sketch, where it is mentioned.

tep 3: Relay Connection

Power SupplyNodeMCURelay Channel- D5IN3VVINVCC12V -VJ-VCCGNDGNDGND

NOW USING Blynk app u can turn on/off your Home Applications in this project I connect two LED You can also connect More Devices based on your requirement so u create two button one dashboard in Blynk app

node_mcu_blynk_code.ino

#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>

// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth[] = "YourAuthToken";

// Your WiFi credentials.
// Set password to "" for open networks.
char ssid[] = "YourNetworkName";
char pass[] = "YourPassword";

void setup()
{
  // Debug console
  Serial.begin(9600);

  Blynk.begin(auth, ssid, pass);
  // You can also specify server:
  //Blynk.begin(auth, ssid, pass, "blynk-cloud.com", 80);
  //Blynk.begin(auth, ssid, pass, IPAddress(192,168,1,100), 8080);
}

void loop()
{
  Blynk.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!
}

Credits

Smit Babariya

12 projects • 39 followers

Embedded Eng. with demonstrated history of working in diff. Projects like ESP32,8266 & Arduino.Strong engineering professional in E&C eng.

Home Automation Using Mobile App

Things used in this project

Hardware components

Software apps and online services

Story

Step 1: Blynk

Step 2: NodeMCU

tep 3: Relay Connection

Code

node_mcu_blynk_code.ino

Credits

Smit Babariya

Comments

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Home Automation Using Mobile App

Home Automation Using Mobile App

Things used in this project

Hardware components

Software apps and online services

Story

Step 1: Blynk

Step 2: NodeMCU

tep 3: Relay Connection

Code

node_mcu_blynk_code.ino

Credits

Smit Babariya

Comments

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