ESP8266 wifi Based Home Automation

                                  

Introduction

Hey there in this session we will discuss about home automation i.e. IOT so we are using ESP8266-12F or Nodemcu and in software portion we will use blynk IOT to control all things over internet from one point to any point in the world.

Components

ESP8266-12F/12E or Nodemcu board 

USB to TTL converter(if you don't use nodemcu or any development board)

Breadboard

100R*5 resistors

LEDs

Circuit

So this is minimum circuit requires to work properly and while esp8266 is connect with wifi it consumes minimum of 150mA so make sure you have used 3.3v regulator to work properly, as I have used AMS1117 3.3v regulator which is enough to power the esp8266.

To program esp8266 you need any USB to TTL converter like CH340 or FDTI and wire connections are as follows 

                      

             ESP8266                                    USB to TTL converter

            VCC(3.3v)   -------------------------- 3.3v(use separate power supply to power ESP module)

            GND            --------------------------  GND

             TX              --------------------------   RX

             RX              --------------------------   TX

Also Circuit is given below make sure connect all wires properly.

Setup new ESP8266 or Nodemcu                                                       

Follows these steps to setup your first ESP module                                                                                  

1. First you need to add ESP boards to Arduino IDE for this you have to copy the link given below ESP8266 Library - https://arduino.esp8266.com/stable/package_esp8266com_index.json                                  

                             

Paste the copied link with commo" , "   and click OK                                                                                                    

                  

2. Now go to tools and select board manager now search for ESP8266 and install the latest version.                                                                       

3. Now go to boards and select your ESP8266 Generic Module and you are done with ESP board     configuration.                                                                                                                                 

4. Now we have to add blynk library to Arduino IDE for this download the library.                                                                                                                                      

 Blynk library(Click the link and download, extract the zip file paste to arduino library)                                                                                                                                         

Blynk IOT Setup                                                                                

1. To setup your blynk iot first you need to create account and login with gmail and password.             

2. After login go to templates and create new, configure with board type and name                              

3. After creating go to datastream click on new datastreams then go to digital to configure output pin name and on which pin will be the output                                                                                      

   

   4. After creating all datastreams go to Web Dashboard now add push button to control the output, I             have configured total of  8 outputs pins also choose the datastream in button settings.                    

5. After this click on save and go to my devices and click on new devices, choose the tamplate and        create the device. After this you need to copy the auth token and tamplate ID and paste it to arduino code given below, make sure entre your WiFi hotspot(wifi router) name and entre the password of your wifi, after this when you power the ESP8266 it automatically connect with wifi because your ESP8266 acts as wifi device.       

How To Upload Code in ESP8266

To program your ESP module you need press boot button then plug to computer and then release boot button to set ESP in boot mode simply click upload button in arduino ide, after uploading code to ESP press reset button to go in running mode that the simple and cheap method otherwise you have to buy premade development boards like Nodemcu.  

Code

#define BLYNK_PRINT Serial

#define BLYNK_TEMPLATE_ID "TMPL3lkduRc-B"

#include <ESP8266WiFi.h>

#include <BlynkSimpleEsp8266.h>

char auth[] = "R5xXov-4RDlBcDcr9PdRS2A7Y0fhwKU-"; 

char ssid[] = "your wifi name";

char pass[] = "wifi password";

void setup()

{

 Serial.begin(9600);

 Blynk.begin(auth, ssid, pass);

}

void loop()

{

  Blynk.run();

}

After code uploaded press reset button on esp8266, when your ESP8266 will connect to your hotspot then its onboard Blue LED will glow(GPIO 2). After that you are done with whole things now just go to your blynk iot and control upto 8 devices.

Circuit Diagram