Controlling Lights Using Google Assistant and Bolt WiFi

IoT has also been implemented in home automation with the help of Google Assistant.

The function of this project to control our home lights with voice commands.

This project gives us freedom to control home automation from anywhere in the home. The only things we need is phone and a internet.

Step 1: Hardware Setup

Take the LED and Bolt WiFi Module.The two legs of the LED one is +ve (long) and second is -ve (Shot). Take +ve leg and insert it into pin 0 and the other leg -ve and insert it into ground pin (GND) of Bolt.

Using USB Cable you can connect Bolt WiFi module into online by laptop or Switch board

Step 2: Bolt API Key and Device ID

Log in to your Bolt Cloud account. In the dashboard, you can find your device ID.

On the left side of the screen you can find API tab.Click on that and copy your API key.

Save it for further use

Step 3: GPIO Control Command

To control your LED with your voice, you need to set up some commands.

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

The command given above is used to control your device.

Edit this command using your API_KEY, pin, HIGH/LOW and your DEVICE_ID.

API_KEY :- Replace the API_KEY by your API_KEY which you copy from could api tab.

PIN_NUMBER :- Replace the pin number by the pin you connected to LED.

HIGH/LOW:- High will turn lights ON and Low will turn lights off.

DEVICE_ID:- Replace the DEVICE_ID by ID copy from dashboard.

Make separate command for lights on and off in IFTTT

Step 4: IFTTT integration with Google Assistant and Webhooks

Go to IFTTT to create a new applet

Login using your Gmail account. Make sure you use same account which you'll be using on your mobile to interact with Google Assistant.

Click on '+This' to create the trigger.

Choose Google Assistant -> Say Specific Phrase

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Type the phrase you want to trigger the action. Make sure to specify the trigger command in different ways for example I used

a) Turn the lights on

b) Turn on the lights

c) Lights on

Click on 'Create Trigger'

Click on '+That'

Select Webhooks and then Make a web request.

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Enter the API URL you got in the previous Step. Make sure that you change the API Key and device name.

Method will be GET

Content type will be Application/json

Here is how your screen will look like

Click on 'Create Action' and then Click on 'Finish'

Steps to turn OFF the LED bulb

Now do the same process for a command to switch of the LED. Here you will change the state to LOW i.e. state=LOW in your code. Here is a sample of the code. Also, add a suitable phrase to switch off the LED.

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

Now it's time for testing!

Now your voice-controlled lights are reday to go. Say "Ok Google" on your Android phone to issue the command.