1. Introduction
2. Wiring and assembling the component
3. Setting up your Blynk App
4. Adding Blynk library and ESP Board on the Arduino IDE
5. Coding
6. Setting up your IFTT Applet for Voice Control
Reference

Published July 9, 2020 © GPL3+

Normal Plug to an App and Voice Controlled Smart Plug

Control your lighting and other appliances from your smartphone using Blynk app and voice control using google assistant IFTT webhook.

BeginnerFull instructions provided5 hours2,476

Things used in this project

Hardware components

Seeed Studio Grove - SPDT Relay(30A)

AC-DC converter 230v to 5v isolated switching power supply board

NodeMCU ESP8266 Breakout Board

Two gang metal socket

Software apps and online services

Arduino IDE

Blynk

IFTTT Maker service

Hand tools and fabrication machines

Soldering iron (generic)

Solder Wire, Lead Free

10 Pc. Jumper Wire Kit, 5 cm Long

Story

1. Introduction

In this challenging times of pandemic, this solution can help lessen the spread of the virus in a premises by eliminating a common touch points such as switches of appliances or equipment.

Transform your regular appliances such as lamp shades, electric fan and others into a phone and voice controlled devices. This cost effective solution can make your dwelling into a smart home and requires less coding experience to implement.

2. Wiring and assembling the component

Using the schematics provided, wire up your component and assemble it firmly inside the outlet. Ensure to have a proper insulation when you seat any of the PCB component on metal part. You can use a double adhesive tape to secure the component and insulate at the same time or you can also use a glue gun.

3. Setting up your Blynk App

Step 1: Download the Blynk App to your phone and create a New Blynk account.

Step 2: Login to your account and start by creating a new project.

Step 3: Select ESP8266 from the hardware drop down and name your project.

Step 4: Every new project you create will have its own Auth Token. You’ll get Auth Token automatically on your email after project creation. You can also copy it manually. Click on devices section and selected required device :

Step 5: Your project canvas is empty, to add a button to control our relay tap anywhere on the canvas to open the widget box. All the available widgets are located here. Now pick a button.

Step 6:Drag-n-Drop - Tap and hold the Widget to drag it to the new position. Each Widget has it’s own settings. Tap on the widget to get to them.

Step 7: The list of pins reflects physical pins defined by your hardware. On our case we connect it to pin 5.

Step 8: When you are done with the Settings - press the PLAY button. This will switch you from EDIT mode to PLAY mode where you can interact with the hardware. You will get a message saying “Arduino UNO is offline”. Its normal because code has not been uploaded to the module yet.

4. Adding Blynk library and ESP Board on the Arduino IDE

Step 1: Start your Arduino IDE and open the Preferences window

Step 2: Enter the following into the Additional Board Manager URLs field. https://arduino.esp8266.com/stable/package_esp8266com_index.json

Step 3: Open Boards Manager from Tools > Board menu and install esp8266 platform (and don't forget to select your ESP8266 board from Tools > Board menu after installation).

Step 4: To install a new library into your Arduino IDE you can use the Library Manager. Open the IDE and click to the "Sketch" menu and then Include Library > Manage Libraries

Step 5: Then the Library Manager will open and you will find a list of libraries that are already installed or ready for installation. Search for Blynk library and in the version selection choose the latest version to date

Step 6: Finally click on Install and wait for the IDE to install the new library. Downloading may take time depending on your connection speed. Once it has finished, an Installed tag should appear next to the Bridge library. You can close the library manager. You can now find the new library available in the Sketch > Include Library menu.

5. Coding

Step 1: Open the sketch 'ESP8266_Standalone' as shown below or create a new file and paste the code provided here.

Step 2: Scroll the sketch and find the following line.

char auth[] = "YourAuthToken";

Step 3: This is the Auth Token that you emailed yourself. Please check your email and copy it, then paste it inside the quotation marks.

Step 4: Look for the following line again to put in your wifi network name and password.

char ssid[] = "YourNetworkName";
char pass[] = "YourPassword";

Step 6: Connect the ESP module to your computer and upload the program.

6. Setting up your IFTT Applet for Voice Control

Step 1: Create a google account if you dont have one and use it to login for IFTT account. https://ifttt.com/

Step 2: Sign in your account and on the top right corner click the drop down icon and click 'Create'.

Step 3: On the search bar, type google and click 'google assistant'.

Step 4: Click 'Connect'

Step 5: On the choose trigger page, select 'say a simple phrase'.

Step 6: Type the phrase you want to say to turn on the device.

Step 7: Click the '+' button on the following page

Step 8: On the search bar, type webhook and click the icon.

Step 9: Click 'connect'.

Step 10: Click 'Make a web request'

Step 11: Fill in the following as shown below. Take note that the authentication code of the URL part must be taken from your blynk account when you add a device. The io pin number refers to the ESP module pin number that you have connected your relay, in our case at D5.

URL: https://188.166.206.43/blynk authentication code/update/io pin number

Step 12: Click 'Finish'

Step 13: Follow the same procedure to create an applet that will turn off the device but take note to put ["1"] on the following settings.

Reference

1. https://docs.blynk.cc/#getting-started-getting-started-with-the-blynk-app-2-create-a-new-project

Code

Smart outlet code

/*************************************************************
  Download latest Blynk library here:
    https://github.com/blynkkk/blynk-library/releases/latest

  Blynk is a platform with iOS and Android apps to control
  Arduino, Raspberry Pi and the likes over the Internet.
  You can easily build graphic interfaces for all your
  projects by simply dragging and dropping widgets.

    Downloads, docs, tutorials: http://www.blynk.cc
    Sketch generator:           http://examples.blynk.cc
    Blynk community:            http://community.blynk.cc
    Follow us:                  http://www.fb.com/blynkapp
                                http://twitter.com/blynk_app

  Blynk library is licensed under MIT license
  This example code is in public domain.

 *************************************************************
  This example runs directly on ESP8266 chip.

  Note: This requires ESP8266 support package:
    https://github.com/esp8266/Arduino

  Please be sure to select the right ESP8266 module
  in the Tools -> Board menu!

  Change WiFi ssid, pass, and Blynk auth token to run :)
  Feel free to apply it to any other example. It's simple!
 *************************************************************/

/* Comment this out to disable prints and save space */
#define BLYNK_PRINT Serial


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

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

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

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

  Blynk.begin(auth, ssid, pass);
}

void loop()
{
  Blynk.run();
}

Credits

P.Santillan

4 projects • 2 followers

Just a hobby :)

Normal Plug to an App and Voice Controlled Smart Plug

Things used in this project

Hardware components

Software apps and online services

Hand tools and fabrication machines

Story

1. Introduction

2. Wiring and assembling the component

3. Setting up your Blynk App

4. Adding Blynk library and ESP Board on the Arduino IDE

5. Coding

6. Setting up your IFTT Applet for Voice Control

Reference

Schematics

Schematics

Code

Smart outlet code

Credits

P.Santillan

Comments

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Normal Plug to an App and Voice Controlled Smart Plug

Normal Plug to an App and Voice Controlled Smart Plug

Things used in this project

Hardware components

Software apps and online services

Hand tools and fabrication machines

Story

1. Introduction

2. Wiring and assembling the component

3. Setting up your Blynk App

4. Adding Blynk library and ESP Board on the Arduino IDE

5. Coding

6. Setting up your IFTT Applet for Voice Control

Reference

Schematics

Schematics

Code

Smart outlet code

Credits

P.Santillan

Comments

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