Home Automation Switching Bulbs ON and OFF in Mobile Application

This is Basic IOT home Automation Project in which we can Turn ON and OFF Bulbs and other appliances using Blynk in our Mobile phone through internet...

1. ESP8266-Nodemcu Board
2. 4-Channel relay Module
3. AC Power Supply
4. Bulbs
5. Bulb Holders
6. Connecting Wires and
7. Jumper Wires

These are the things that i used in this product...For your Convenience you can connect more Bulbs if You needed.

• At First, to use Nodemcu Board in your Arduino IDE, You need to add this board in your Arduino IDE

In Our Arduino IDE, Click File -> Preferences -> Add additional Board links :

Nodemcu board Copy and add this link in that box

• Then, In Arduino IDE -> Click 'Tools' -> Manage Libraries -> Search for "ESP8266"

Download that "ESP8266" library and Tools -> Boards -> Select 'Nodemcu 1.0 ESP-12 Module'

Tools -> Ports -> Select correct port in which your Nodemcu board is plugged in

Add the following Lines of code in your Arduino IDE which i given as a picture

#define BLYNK_PRINT Serial

#include < ESP8266WiFi . h >

#include < BlynkSimpleEsp8266 . h >

char auth[] = "YourAuthToken"; //enter your token id which is sent to your registered email id by blynk

char ssid[] = "open-wifi"; //enter your wifi id and Password

char pass[] = "1234509876"; //enter your wifi id and Password

void setup()

{

Serial.begin(9600);

Blynk.begin(auth, ssid, pass);

}

void loop()

{

Blynk.run();

}

• For Android Users, in playstore Search for "Blynk" app and download it for IOS users do the same in Appstore.

• Once You downloaded Signup with your Email-id (Make sure that email-id is active since the authentication code will be sent to this email-id, which will be used in coding in arduino IDE)

• Click Create New project and give a related name to it and select device here we are using "ESP 8266" select it.

• Click Plus Button on the top right corner to add widgets...Here we need 2 buttons to control 2 bulbs so add it by clicking and change the properties of the button if you need and don't forget to add the pin number in which nodemcu is connected which relay module (for ex: D0,D2,D3,etc...)

• Here we are using 2 bulbs hence we need only two relays to switch on.

• So connect VCC pin and GND pin of Relay module with Vin and GND pin of ESP8266 Nodemcu Board respectively with the help of Jumper Wires (F-F)

• Then connect Input1 and input2 pins of relay 1 and 2 with any GPIO D0,D1 pin in ESP8266 Nodemcu board. Here Input1 pin and input2 pin is connected with D0 and D1 pins Respectively using Jumper Wires (F-F)

• While doing these kind of IOT projects, Netural connection from Main AC supply should be connected directly to the home appliances here we connected netural wire directly with two Bulbs.

• Whereas the phase or line Wire from Main AC should connected with two 'Common' poles of two relays respectively.

• The output from the relays which is from the "Normally Open" is connected with the phase of the two bulbs respectively

Once All the above connections were made

Final product is ready to use. Now switch ON the AC power supply to relay module

Make sure that Nodemcu board is also connected with power of minimum 5V And check wheather nodemcu is connected with respective hotspot that is given while coding

Then open your Blynk app in your mobile phone and switch ON and OFF bulbs just by clicking it...

Thanks for reading my instructable

Hence we done this small IOT automation project and also i attached the my Youtube video on the working of this final product....

I attached simple circuit diagram for better understanding purpose

THANK YOU....................