Setting up the buzzer
Setting up the LDR
Setting up Twillio
IFTTT integration via Google Assistant and Webhooks
Where to write the code
Lets test it

Published March 31, 2020

alarm_system

Alarm system for your vault at home

BeginnerWork in progress1 hour479

Things used in this project

Hardware components

LDR, 5 Mohm

Buzzer

Bolt IoT Bolt WiFi Module

Male/Female Jumper Wires

Jumper wires (generic)

Software apps and online services

IFTTT google-assistant

Twilio SMS Messaging API

Story

Overview of the project

The working of project is simple. On opening the vault door the LDR would sense a change in light and the buzzer would turn on. An SMS will be immediately sent to you on your phone. To turn of the buzzer simply use 'OK GOOGLE'.

We have all the components required and now we need to know how to set it up.

Setting up the buzzer

Using the male-female wires insert the buzzer pins to the female points
Connect the positive side of the buzzer to the pin 1 of boltiot module
Connect the other point of buzzer to the pin 2

Setting up the LDR

Place the LDR on the bread board
Connect one point of LDR to the 'A0' pin using male wires
Connect the other point of the LDR to the ground/GND of the module

Setting up Twillio

Here's a link for you to follow how to create a account on twillio and get a number to send SMS from

https://support.vision6.com.au/hc/en-us/articles/230673727-Text-Messaging-Account-Setup-with-Twilio

IFTTT integration via Google Assistant and Webhooks

Go to IFTTT or sign in by clicking here

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 your profile and select "Create"

Click on '+This' to create the trigger.

Choose "Google Assistant" -> Say Specific Phrase

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 off alarm

b) Turn off the alarm

c) Alarm off

Click on 'Create Trigger'

Click on '+That'

Select Webhooks and then Make a web request.

Enter the your API URL. Make sure that you change the API Key and device name.

Here is how your URL will look like: https://cloud.boltiot.com/remote/<API-KEY>/digitalMultiWrite?pins=1, 2&states=LOW, LOW&deviceName=<DEVICE-ID>

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'

Done.!

Where to write the code ?

I've launched an Ubuntu server using AWS EC2 instance.

You can use any of the platform (like digitalOceans ubuntu image or a VM or any other tool that you already use to write your IOT code)

Lets test it

We are done setting up everything. Time to test before we finally put it to use.

Set a threshold value to compare against first

Turn off the light or simply cover the LDR ciruit with a box to keep it dark. After a few seconds say 20 remove the box or turn on the light. ASA the LDR senses the change in light it will raise an alarm and send an SMS to you. On receiving the SMS wake your google assistant by saying "OK GOOGLE" and commanding it to turn off the buzzer.

Code

from boltiot import Bolt,Sms
import json, conf, time

mybolt = Bolt(conf.api_key,conf.device_id)
sms = Sms(conf.SID,conf.AUTH_TOKEN,conf.TO_NUMBER,conf.FROM_NUMBER)

threshold = 10

#function to turn on buzzer
def intruder():
        mybolt.digitalWrite('1','HIGH')
        mybolt.digitalWrite('2','LOW')

while True:
        #reading LDR data
        response = mybolt.analogRead('A0')
        data = json.loads(response)
        current_voltage = int(data['value'])
        print(current_voltage)
        try:
                if current_voltage < threshold:
                        print('current voltage dropped')
                        intruder()
                        print('Sending SMS via twilio')
                        response = sms.send_sms('ALERT....Vault opened')
                        print(str(response.status))
        except Exception as e:
                print('Error: ', e)
        time.sleep(2)

Credits

Swapnil Sawant

1 project • 0 followers

alarm_system

Things used in this project

Hardware components

Software apps and online services

Story

Setting up the buzzer

Setting up the LDR

Setting up Twillio

IFTTT integration via Google Assistant and Webhooks

Where to write the code ?

Lets test it

Schematics

Alarm_system_circuit

Code

Alarm_system

Alarm_system

Alarm_system

Credits

Swapnil Sawant

Comments

Embed the widget on your own site

alarm_system

alarm_system

Things used in this project

Hardware components

Software apps and online services

Story

Setting up the buzzer

Setting up the LDR

Setting up Twillio

IFTTT integration via Google Assistant and Webhooks

Where to write the code ?

Lets test it

Schematics

Alarm_system_circuit

Code

Alarm_system

Alarm_system

Alarm_system

Credits

Swapnil Sawant

Comments

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