Steps for making this project

Published May 26, 2020

Smart doorbell for deaf people

A doorbell which can be controlled online via phone or computer which then glows the bulb and sends an SMS every time it is on.

IntermediateFull instructions provided1 hour897

Things used in this project

Hardware components

LED (generic)

Resistor 330 ohm

Male/Male Jumper Wires

Bolt IoT Bolt WiFi Module

Breadboard (generic)

Software apps and online services

Microsoft Visual Studio Code Extension for Arduino

Bolt IoT Bolt Cloud

Twilio SMS Messaging API

Story

I saw many people with deafness encountering this problem. Every time, someone knocked at the door they were unable to realise it because most of the doorbells these days are sound-oriented. Hence, I decided to make such a device which will light a bulb every time anyone presses the button on their screen and also sends an SMS saying "The doorbell rang" as a precautionary measure. We can also use a switch instead of the HTML code but in light of the occurrence of the new COVID-19 pandemic, I thought it is best if someone rings the bell via their phone.

Steps for making this project :

1. Take one leg of the 330-ohm resistor and wrap it around the longer leg of the LED i.e positive leg.

2. Insert the above connection onto a breadboard

3. Now insert Male/Male jumping wires (2), and connect them to GND and GPIO pins

. Make sure you connect the one near LED to GND and another one to the GPIO pin. I have used GPIO pin 2 in my case, you can use any one of them. It doesn't matter. Just make sure you change your code accordingly if you do so.

There you go, we're done with the hardware connections.

For the software part, copy the code that I have written below. Beware that the python code(app.py) should run in the background every time you turn on or off the bulb for successful execution.

It doesn't matter how many times you switch the bulb off while the code is running, once you switch it on, you will receive an SMS.

We can also check the status of the bulb by typing "status" in the console.

Video :

Code

<!DOCTYPE html>
<html>
    <head>
        <title>Smart Doorbell System</title>
       
        <script type="text/javascript" src="https://cloud.boltiot.com/static/js/boltCommands.js"></script>
        <script>
        setKey('{{ApiKey}}','{{Name}}');
        </script>
        <style>
            button{width : 250px;height  : 200px;font-size : 100px;}
          
        </style>
    </head>
    <body>
        <center>
         <h1>Smart Doorbell System</h1>
        <button onclick="switchLEDoN()">ON</button>
        <button onclick="switchLEDoFF()">OFF</button>
        
        </center>

        <script>
            let status = 0;
            function switchLEDoN() {
                if(status == 0) {
                    status=1;
                    digitalWrite(2, 'HIGH');
                    fetch("http://localhost:5000/sendSMS?ledstatus=1")
                        .then(res=>res.json())
                        .then(data=>{
                            if(data.code==200)
                                console.log(data.data);
                        })
                }
            }
            function switchLEDoFF() {
                if(status == 1){
                    status = 0;
                    digitalWrite(2, 'LOW');
                }
            } 
        
        </script>
    </body>
</html>

from flask import Flask, request
import conf
import json
import time
from boltiot import Sms, Bolt
import json
import time

mybolt = Bolt(conf.API_KEY, conf.DEVICE_ID)
sms = Sms(conf.SSID, conf.AUTH_TOKEN, conf.TO_NUMBER, conf.FROM_NUMBER)

app = Flask(__name__)


@app.route("/sendSMS", methods=['GET'])
def sendSMS():
    if request.method == 'GET':
        ledstatus = request.args.get('ledstatus')

        print(ledstatus)
        print(ledstatus == '1')

        res = {
            'code': "400",
            'data': "Bad request",
        }
        if ledstatus == '1':
            print(sms.send_sms('The door bell rang!'))
            res = {
                'code': 200,
                'data': "SMS sent"
            }

        elif ledstatus == '0':
            print("led off")

        return json.dumps(res)


app.run()

Credits

Sakshi Doshi

1 project • 2 followers

Smart doorbell for deaf people

Things used in this project

Hardware components

Software apps and online services

Story

Steps for making this project :

Schematics

Circuit Diagram

Code

main.html

app.py

Credits

Sakshi Doshi

Comments

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Smart doorbell for deaf people

Smart doorbell for deaf people

Things used in this project

Hardware components

Software apps and online services

Story

Steps for making this project :

Schematics

Circuit Diagram

Code

main.html

app.py

Credits

Sakshi Doshi

Comments

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