Voice Controlled Smart Home

This is a voice controlled ( Google Assistant ) home automation project.

In this project we can connect any of our home appliance ( I have used light here) and make it a IOT stuff.

Step 1 - Get all the required components with you

1) Bolt iot wifi module

2) 5v Relay

3) Jumper wires

4) Bulb & its holder

5) 2-pin socket & a smartphone charging adapter (any usb port will work)

Step 2 - Connecting those hardware together

1) Connect the 5V pin and GND pin of the Bolt module to the VCC/DC+ and GND pin of the relay module.

2) Connect any of the digital pin (i.e 0-4) of the Bolt to the IN/REL pin of the relay module.

3) Connect a wire from the NO pin of the relay module to the 2-pin socket.

4) Connect a wire from the COM pin of the relay module to the bulb holder.

5) Connect the remaining terminal of the bulb holder tot the other terminal of the 2-pin socket.

CIRCUIT DIAGRAM:

Step 3 - Configuring Bolt Cloud

1. Go to cloud.botiot.com and login with your account credentials.

2. Note the ID of your Bolt WiFi module.

3. Now click on 'API' and then Generate the Key and enable it. Note it down, we will use it very soon!

4. Since relay is a digital output device, we will need to get a Digital Write command that can be sent to Bolt over the Internet to switch on the relay.

Click here or move to Docs Tab -> API Documentation -> GPIO Commands API -> Write Digital Output to understand how to create a API command link to turn on and to turn off a pin of the Bolt.

5. The code we are going to use will look like this:

https://cloud.boltiot.com/remote/API_KEY/digitalWrite?pin=PIN_NUMBER&state=HIGH/LOW&deviceName=DEVICE_ID

Here:

High refers to the state ON

Low refers to the state OFF

PIN_NUMBER is the gpio (0-4) pin which you have connected to the relay's vcc/dc+/5v.

Step 4 - Integration with Google Assistant for voice control

Steps to turn ON the Relay

Step 1 - Go to IFTTT and login/signup with your google account and then create a new applet by clicking here.

Make sure you use same account which you are using in your android right now.

Step 2 - Click on Add

Step 3 - Search for Google assistant and Click on it

Step 4 - Click Say a simple phrase and Type whatever you need to make google assistant switch on the light! Click on Create trigger.

Step 5 - Now click on Then That Add

Step 6 - Search for Webhooks and then Make a web request.

Step 7 - Enter the API URL that you got previously. Make sure that you change the API Key, input pin number (0/1/2/3/4) and device id as your configuration.

Method will be GET

Content type will be Application/json

Here is how the screen will look like:

Now click Create action -> Continue -> Finish

Now your Google assistant will hear you and perform switch ON action!

Steps to turn OFF the Relay

Now follow the same process (step-4 to step-7) that we have done before for switching ON the relay. Here you will change the state to LOW i.e. state=LOW in our code. Here is a sample of the code.

https://cloud.boltiot.com/remote/API_KEY/digitalWrite?pin=0&state=LOW&deviceName=BOLT432123

Now your Google assistant will hear you and perform switch OFF action!

Time to test it out!

Take your Android phone and say "OK Google" followed by our command (eg: turn on the light) and watch what happens next! BOOM!!!!!!

Thank you!