Published August 2, 2019 © GPL3+

Automatic Lights for Two-Door Hall

Turns lights on when people enter and turns them off when they leave. Also sends email notifications regarding number of people in the hall.

IntermediateFull instructions provided1 hour476

Things used in this project

Hardware components

Bolt IoT Bolt WiFi Module

IR Infrared Obstacle Avoidance Sensor Module

Breadboard (generic)

LED (generic)

Resistor 330 ohm

Male/Female Jumper Wires

Male/Male Jumper Wires

Micro-USB to USB Cable (Generic)

Software apps and online services

Bolt IoT Bolt Cloud

Bolt IoT Android App

Bubble Visual Programming Platform

Story

Introduction

Did you ever gave your hall on lease and wondered how people are using it? Or worried about mistakenly leaving the lights ON? Maybe you want to impress your friends or colleagues with your tech-savviness. In all of these cases, we got you covered!

In this project, you will learn how to build a device which turns ON the lights when someone enters the room and turns it OFF when they leave. You can also get an on-demand notification through your email informing you about the number of people inside the hall.

Step 1: Important

Do note, this is an intermediate tutorial and assumes that you know the basics of Bolt IoT module and also how to set up your Virtual Private Server (VPS) for using alongside Bolt Cloud.

If you’re unaware about Bolt IoT and VPS, follow the link below:-

https://docs.boltiot.com/docs/introduction

https://docs.boltiot.com/docs/python-library

Bolt Documentation

Step 2: Form the Circuit

Produce the circuit as shown in the schematics. Always remember to complete the circuit before supplying power to your electronic device.

Step 3: Writing the Code

Write the given python code in your Virtual Private Server. My VPS works on Ubuntu Server Edition.

Before executing the code, you need to put one sensor on the door-frame of the Entry door and one on the door-frame of the Exit door.

Now every time someone enters, the sensors would send the information to us and the code will increase the number of people in the hall by 1. Similarly, when someone leaves, the code will decrease the number of people in the hall by 1. And accordingly, the lights will be switched ON or OFF.

Step 4: Making the Web App

Here, we will learn to build a web app using Bubble Visual Programming Platform which will make the device send an Email informing us about the number of people in the hall.

If you’re unaware Bubble Visual Programming, follow the link below:-

https://docs.boltiot.com/docs/creating-app-from-basics

Bubble.is

When you’re done with that, create an app that has a single button which on being pressed turns pin-2 of Bolt IoT module HIGH. This would be the signal for the device to send the email.

Step 5: Execution

When you have set up the Bolt IoT module with sensors at the designated places and loaded the VPS with your code, it is time for some action!

This is how the prototype looks

Execute the code on your virtual private server. Put your fingers in front of the sensor to test whether it is working or not. VPS would show “People = 1”. Do the same thing with the other sensor and VPS would show “People= 0”.

Screen of my Virtual Private Server (VPS)

Open the web app you just created and press the button. An Email with information regarding the number of people in the hall will be sent to your email address.

My Web App

Code

Code for Automatic Lights System

from boltiot import Bolt, Email
import conf	#contains all confidential information like API Key, Device ID, Sandbox URL, etc.
import json, time

mybolt = Bolt(conf.api_key, conf.device_id)
mailer = Email(conf.mg_api_key, conf.sandbox_url, conf.sender_EM, conf.recipient_EM)

people = 0

while True:
	try:
		# Read Input and determine number of people entering the room

		response = mybolt.digitalRead('0') #IP Sensor for Entry Door
		data = json.loads(response)
		if data['value'] == "0" :
			people = people + 1


		#Read Input and determine number of people exiting the room

		response = mybolt.digitalRead('1') #IP Sensor for Exit Door
		data = json.loads(response)
		if data['value'] == "0" :
			people = people - 1
			if people < 0:
				people = 0

		#Take action on Lights

		if people > 0:
			mybolt.digitalWrite('4', 'HIGH') #To Relay or LED
		else:
			mybolt.digitalWrite('4', 'LOW')


		#Send Email with details when asked to do so through web-app

		response = mybolt.digitalRead('3') #Detects whether pin-2 is HIGH
		data = json.loads(response)
		if data['value'] == '1' :
			response = mailer.send_email("Room Info.", "The number of people in the room =" +str(people))
			print("Email Sent")
			response = mybolt.digitalWrite('2', 'LOW')
		print("The number of people in the hall = "+str(people))
		print("Sleep for 2 seconds") #Use delay of 20 seconds if you do not have Pro Pack of Bolt Cloud
		time.sleep(2)

	except Exception as e:
		print("Something went wrong: ", e)
		print("Restarting Bolt...")
		response = mybolt.restart()

Credits

Dhanesh Tolia

1 project • 0 followers

I am currently an undergraduate student at NIT Jamshedpur. Computers fascinate me. To watch them transform our physical world is my passion.

Automatic Lights for Two-Door Hall

Things used in this project

Hardware components

Software apps and online services

Story

Introduction

Step 1: Important

Step 2: Form the Circuit

Step 3: Writing the Code

Step 4: Making the Web App

Step 5: Execution

Schematics

Circuit Diagram

Code

Code for Automatic Lights System

Credits

Dhanesh Tolia

Comments

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Automatic Lights for Two-Door Hall

Automatic Lights for Two-Door Hall

Things used in this project

Hardware components

Software apps and online services

Story

Introduction

Step 1: Important

Step 2: Form the Circuit

Step 3: Writing the Code

Step 4: Making the Web App

Step 5: Execution

Schematics

Circuit Diagram

Code

Code for Automatic Lights System

Credits

Dhanesh Tolia

Comments

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