Published March 20, 2019 © GPL3+

Mi Band Home Automation

Use a Mi Band 2/3 to switch ON/OFF devices like fan, light or anything else that comes to your mind.

IntermediateFull instructions provided7,794

Things used in this project

Hardware components

MI band

NodeMCU ESP8266 Breakout Board

optocoupler 12v relay

Software apps and online services

IFTTT Maker service

Blynk

Mi Band 2/3 & Amazfit Сhannel ( Weather )

Story

Introduction

In this DIY project, we are using a Mi Band 2 (or you can use Mi Band 3) to turn on/off devices like a fan, a light or anything else that comes to mind, from anywhere in the world.

Let's See It in Action

Full Video Tutorial

Making

Let's divide the process into small sections for easy understanding.

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.

1 / 7

Step 2: NodeMCU

We are going to program NodeMCU with Arduino IDE.

First, We need to install the NodeMCU support in Arduino IDE, Watch the below video on how to do it or read the instructions https://www.hackster.io/najad/using-arduino-ide-to-program-nodemcu-33e899

Secondly, We need to install the required library to run Blynk in NodeMCU,
Search for blynk in Library Manager and install the latest version or You can download Zip file from Github (https://github.com/blynkkk/blynk-library) and install manually using add.ZIP Library option in Arduino IDE.
Then, go to File -> Examples -> Blynk -> Boards_WiFi -> NodeMCU, as shown below.

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.

Now select the board from the tools menu and upload the sketch.

Now open serial monitor from the tools menu, if everything is done successfully, You can see the results like this

Step 3: Relay Connection

Now connect a relay to the NodeMCU so We can control external AC / DC appliances.

Connect the circuit as follows.

Step 4: IFTTT

Either you can use IFTTT website to IFTTT mobile app to create Applets. Here I'm using IFTTT website, in the video, I have shown how to do it in the IFTTT mobile app.Before start create IFTTT applet we need to create two HTTP request links, one for turning ON the relay and one for turning OFF the relay.http://188.166.206.43/blynkAuthToken/update/D14?value=0http://188.166.206.43/blynkAuthToken/update/D14?value=1Here,

The 188.166.206.43 is the IP address of blynk server.
You need to replace your blynk Auth Token, where it is mentioned in the request link.
D14 is the pin which we have connected our relay, actually, we have connected relay to the D5 pin of NodeMCU but here in the HTTP request link we need to address the GPIO pin number, so the GPIO pin number for physical pin D5 is D14.
When we call value=0 it will make the pin D5 LOW, the relay is ON.
When we call value=1 it will make the pin D5 HIGH, the relay is OFF

Creating Applet For Relay ON

Go to www.ifttt.com then login using your account or signup if you don't have an account.
Then under applets tab click on new applets button.

Now, click on the +this button.
Then choose a service page will open.

From "choose a service" page, search for webhooks and click on it.
Then "choose trigger" page will open.

From "choose trigger" page click on Receive a web request.

Now in event name write Relay_ON.
and click create trigger button.

Now, choose +that button.

Then like before, search for webhooks and click on it.

Now from "choose action" click on Make a web request.
and fill the details as shown below.

URL: In this filed paste the HTTP request link which is created before, don't forget to edit the URL with your blynk Auth Token.
Method: From the drop-down list choose GET.
Content/Type: Choose text/plain from the dropdown list.
Body: Leave it blank.
Now, Click Create action Button.

Now we have successfully created an applet for turning the relay ON.
like the same way, we need to create another applet for turning OFF the relay.
Below is the screenshot of the two steps which you need to make changes.

In this applet Write Relay_OFF instead of Relay_ON.

Paste the HTTP request URL for turning OFF the relay, that is the value=1.
and click on create action button.

Now we have Successfully created Applets for both Relay ON and Relay OFF.

Step 5: Mi Band 2/3 & Amazfit Сhannel

Firstly connect your Mi Band with your phone using the MI Fit android app.
Now open Mi Band 2/3 & Amazfit Сhannel app from your phone and fill the details as shown below,

MAC: it will be filled automatically if you have connected the Mi Band with your phone.
Event 2 click: Write Relay_ON this is the same event name which we have given in IFTTT applet for Relay_ON.
Event 3 click: Write Relay_OFF this is the same event name which we have given in IFTTT applet for Relay_ON.
Key: this is the unique key for your webhooks service, follow the below steps to get your key,
go to https://ifttt.com/my_services.
search for webhooks and select it.
click on settings, and you can see your key.
copy and paste it in the Key field in Mi Band 2/3 & Amazfit Сhannel application.

Testing

Now click on the connect button, if everything is perfect your Mi Band will vibrate and you can see IFTTT notification on your Mi Band.

Now if you double tap on your band the relay will turn ON and if will turn OFF if you triple tap.

Test Video

Full Video Tutorial

Read in my blog: https://www.diyusthad.com/2019/03/turn-onoff-devices-using-mi-band.html

Code

Untitled file

/*************************************************************
  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 NodeMCU.

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

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

  For advanced settings please follow ESP examples :
   - ESP8266_Standalone_Manual_IP.ino
   - ESP8266_Standalone_SmartConfig.ino
   - ESP8266_Standalone_SSL.ino

  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[] = "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();
}

Credits

Najad

30 projects • 96 followers

Just crazy stuff

Mi Band Home Automation

Things used in this project

Hardware components

Software apps and online services

Story

Introduction

Let's See It in Action

Full Video Tutorial

Making

Step 1: Blynk

Step 2: NodeMCU

Step 3: Relay Connection

Step 4: IFTTT

Creating Applet For Relay ON

Step 5: Mi Band 2/3 & Amazfit Сhannel

Testing

Test Video

Full Video Tutorial

Schematics

circuit_bb_ezwgBGamE8.png

Code

Untitled file

Blynk library

Credits

Najad

Comments

Embed the widget on your own site

Mi Band Home Automation

Mi Band Home Automation

Things used in this project

Hardware components

Software apps and online services

Story

Introduction

Let's See It in Action

Full Video Tutorial

Making

Step 1: Blynk

Step 2: NodeMCU

Step 3: Relay Connection

Step 4: IFTTT

Creating Applet For Relay ON

Step 5: Mi Band 2/3 & Amazfit Сhannel

Testing

Test Video

Full Video Tutorial

Schematics

circuit_bb_ezwgBGamE8.png

Code

Untitled file

Blynk library

Credits

Najad

Comments

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