Alert! There is an intruder! or just someone entered your room
Step 1: Make the Connections
Step 2: Create an account on Twilio
Step 3: Install Python and Boltiot Library
Step 4: Coding...
Step 5: Execution

Published August 8, 2020 © GPL3+

Get a SMS when someone enters your Room!

When someone enters your room and switches on the light you'll an alert message via SMS on your phone.

IntermediateFull instructions provided1 hour807

Get a SMS when someone enters your Room!

Things used in this project

Hardware components

LDR, 5 Mohm

USB-A to Micro-USB Cable

Resistor 10k ohm

Bolt IoT Bolt WiFi Module

Story

Alert! There is an intruder! or just someone entered your room.

Let's say you don't want anybody come into your when you're away. So this project might help you.

This project will help you how to set up a system which will send you an alert sms on your phone when someone or anyone enters your room and switches on the light. We will be using Light Sensor and Z - Score analysis to detect any sudden change in light inside the room (of course if someone comes into your they will turn on light which will be an anomaly) this will trigger our system to send an sms while you are away.

Step 1: Make the Connections.

Get your Bolt device

Bolt Device

It should look like this if it isn't then maybe you got the wrong package (pun intended)

Now, get your LDR senor and 10K Ohm resistor

1 / 2 • LDR Sensor

Now, put one leg of LDR in 3V3 pin of Bolt Module and the other leg in A0 pin. For the resistor, put one leg of resistor in GND pin of bolt device and the other also in A0 pin. Please check that in no case the GND pin of resistor is touching the 3V3 pin of the LDR sensor. Connection should look like this.

Note: Check Schematic Diagram for detail connection.

Final Connection

Step 2: Create an account on Twilio

Twilio is just basically a website which will give you a phone number so that your device will use that phone number to send you alert messages when someone enters your room. Go to Twilio.com to create an account. They will ask your email and phone number for verification. This will give you a trial account which we need. After creation of the account you will get a dashboard like below you just need to click on "get a trial number" to get a number. Now it will look like this.

Twilio Dashboard

Here are three important things.

1. Trial Number

2. Account SID

3. Auth Token

To get Auth Token you just need to click on show and it will start showing you your auth token. Make sure to save these three things somewhere like notepad. Because we will need them. Also you need Bolt API key and Bolt Device ID which you can get on your account on cloud.boltiot.com

Step 3: Install Python and Boltiot Library

If you do not have python install on your computer click on this link and download it's latest package. When the installation is complete open cmd and type

pip install boltiot

This will install Boltiot library on your computer.

Step 4: Coding....

Go to code section. create a txt file on your computer and save it as conf.py file with configuration code inside it. Similarly do it for Main file and save it as main.py

Step 5: Execution

Power your Bolt Device. Now, to run your code go to the folder where you have saved your python files and click on the address bar and type cmd and press enter to open command prompt.

python main.py

Type this above command in cmd and hit enter the code will start running. If everything went correct it should look like this.

Execution

It will say that it needs 10 more data point to compute z - score analysis. Just let it run for about 100 seconds and after you can leave the room and wait. If someone enters your room and switches on the light you will get an sms like this.

SMS

Code

#Here we are importing some important librarires to help in our code
import conf, json, time, math, statistics

#Import Bolt Library
from boltiot import Sms, Bolt

#Define a fucntion for checking any suddeness in light
def compute_bounds(history_data,frame_size,factor):
    if len(history_data)<frame_size :
        return None

    if len(history_data)>frame_size :
        del history_data[0:len(history_data)-frame_size]
    Mn=statistics.mean(history_data)
    Variance=0
    for data in history_data :
        Variance += math.pow((data-Mn),2)
    Zn = factor * math.sqrt(Variance / frame_size)
    High_bound = history_data[frame_size-1]+Zn
    Low_bound = history_data[frame_size-1]-Zn
    return [High_bound,Low_bound]

#Give info like your api key, device ID, your number, Twilio Number etc.
mybolt = Bolt(conf.API_KEY, conf.DEVICE_ID)
sms = Sms(conf.SSID, conf.AUTH_TOKEN, conf.TO_NUMBER, conf.FROM_NUMBER)
history_data=[]

#Make an infinite loop which will keep running until you stop with CTRL + C
while True:
    response = mybolt.analogRead('A0')
    data = json.loads(response)
    if data['success'] != 1:
        print("There was an error while retriving the data.")
        print("This is the error:"+data['value'])
        time.sleep(10)
        continue

    print ("This is the value "+data['value'])
    sensor_value=0
    try:
        sensor_value = int(data['value'])
    except e:
        print("There was an error while parsing the response: ",e)
        continue

    bound = compute_bounds(history_data,conf.FRAME_SIZE,conf.MUL_FACTOR)
    if not bound:
        required_data_count=conf.FRAME_SIZE-len(history_data)
        print("Not enough data to compute Z-score. Need ",required_data_count," more data points")
        history_data.append(int(data['value']))
        time.sleep(10)
        continue

    try:
        if sensor_value > bound[0] :
            print ("The light level increased suddenly. Sending an SMS.")
            response = sms.send_sms("Someone turned on the lights")
            print("This is the response ",response)
        elif sensor_value < bound[1]:
            print ("The light level decreased suddenly. Sending an SMS.")
            response = sms.send_sms("Someone turned off the lights")
            print("This is the response ",response)
        history_data.append(sensor_value);
    except Exception as e:
        print ("Error",e)
    time.sleep(10)

Get a SMS when someone enters your Room!

Things used in this project

Hardware components

Story

Alert! There is an intruder! or just someone entered your room.

Step 1: Make the Connections.

Step 2: Create an account on Twilio

Step 3: Install Python and Boltiot Library

Step 4: Coding....

Step 5: Execution

Schematics

Connections

Code

Configuration

Main Code

Credits

Rishabh Dwivedi

Comments

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Get a SMS when someone enters your Room!

Get a SMS when someone enters your Room!

Things used in this project

Hardware components

Story

Alert! There is an intruder! or just someone entered your room.

Step 1: Make the Connections.

Step 2: Create an account on Twilio

Step 3: Install Python and Boltiot Library

Step 4: Coding....

Step 5: Execution

Schematics

Connections

Code

Configuration

Main Code

Credits

Rishabh Dwivedi

Comments

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