Published July 16, 2019

Controlling Lights using LDR Sensor and BOLT wifi module

This project can be used in a place where you need to control the lights.

IntermediateFull instructions provided2 hours1,243

Controlling Lights using LDR Sensor and BOLT wifi module

Things used in this project

Hardware components

Bolt IoT Bolt WiFi Module

LDR, 5 Mohm

Resistor 10k ohm

Resistor 330 ohm

LED (generic)

Story

WORKING of the PROJECT

1) The LDR sensor keeps reading the value of the light intensity in the room.

2) The maximum value the sensor can read is 1024. Which means that the lights are ON.

3) So you can set the maximum_limit to about 1000 to make sure that the BOLT module respond by sending you an email using MAILGUN, that the lights are ON.

4) If the lights are OFF it does the same thing. The minimum_limit can be set according to your will. I have set it to 500.

5) So if the sensor value becomes less then 500 it will again inform you by sending you an email that that the lights are OFF.

6) If the lights are OFF it automatically turn ON the lights (In this case I used the LEDS to show the working ).

This is the whole working of the project.

It is very important to have a mailgun account. The instructions are given below

Creating an account on Mailgun

Step 1: Open https://www.mailgun.com/ in browser.

Step 2: Click on Sign Upbutton.

Step 3: Fill all the necessary details in SIGN UP form. Make sure you are unchecking the payment option. Below is the screenshot of filled sign up form.

Step 4: You will get a verification mail having a link. Click on that link to verify your mail.

Step 5: To verify they will ask for phone number. Choose India as an option in the dropdown and then enter your phone number.

Step 6: After verification, scroll down to Sandbox Domain section. Click on Add Recipient button.

Step 7: Click on Invite New Recipient button.

Step 8: Enter the Receipient Email ID. In this case enter your Email ID.

Step 9: After adding Email ID a new sandbox will be generated. Click on the ID of the newly generated sandbox. Refer below image for the same.

Step 10: The new screen will have all the necessary credentials that you want for sending an email. Copy all this credentials and save in the notepad.

That's it. You have successfully created the account on Mailgun. In the next lesson, we will use Bolt Python library to create our own Email Alert system.

Connection on the bread board

Remember the color of wire connected on the bolt module .
1) Connect the blue wire to 3.3v of the bolt module and to ldr(to the small leg of the ldr)
2) Connect the red wire to A0 and other leg of the LDR
3) Connect the ground by a brown wire and then to the resistor on the bread board. As in the picture shown below.
4) Now connect the green wire to "1"on the bolt module and connect leds by using the 330ohm resistor .
5) The purple wire is just the jumper wire which i have used to as a ground connected wire the ground of the bolt

AND THAT'S IT YOUR PROJECT IS READY

Code

MAIN CODE

#write this in email_conf.py file
MAILGUN_API_KEY = 'This is the private API key which you can find on your Mailgun Dashboard' 
SANDBOX_URL= 'You can find this on your Mailgun Dashboard' 
SENDER_EMAIL = 'This would be test@your SANDBOX_URL'
RECIPIENT_EMAIL = 'Enter your Email ID Here'
API_KEY = 'This is your Bolt Cloud account API key'
DEVICE_ID = 'This is the ID of your Bolt device'

#this is your main code 
import email_conf
from boltiot import Email, Bolt
import json, time

minimum_limit = 500
maximum_limit = 1000  


mybolt = Bolt(email_conf.API_KEY, email_conf.DEVICE_ID)
mailer = Email(email_conf.MAILGUN_API_KEY, email_conf.SANDBOX_URL, email_conf.SENDER_EMAIL, email_conf.RECIPIENT_EMAIL)


while True: 
    print ("Reading sensor value...")
    response = mybolt.analogRead('A0') 
    data = json.loads(response) 
    print("Sensor value is: " + str(data['value']))
    try: 
        sensor_value = int(data['value']) 
        if sensor_value > maximum_limit :
            print("Making request to MAILGUN to send an EMIAL..")
            response = mailer.send_emial("Alert ", "Lights are ON..")
            response = mybolt.digitalWrite('1','LOW')
            response_text = json.loads(response.text)
            print("Response received from MAILUGun is: " + str(response_text['message']))
        elif sensor_value < minimum_value :
            print("Making request to MAILGUN to send an EMAIL...")
            response = mailer.send_email("Alert","The lights are OFF")
            response = mybolt.digitalWrite('1','HIGH')
            response_text = json.loads(response.text)
            print("Response received from MAILUGun is: " + str(response_text['message']))
    except Exception as e: 
        print ("Error occured: Below are the details")
        print (e)
    time.sleep(10)

Credits

Akash Auti

2 projects • 1 follower

Controlling Lights using LDR Sensor and BOLT wifi module

Things used in this project

Hardware components

Story

WORKING of the PROJECT

Creating an account on Mailgun

Schematics

Connection on the bread board

EMAIL

Circuit connection

Connections on the bolt module

Code

MAIN CODE

Credits

Akash Auti

Comments

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Controlling Lights using LDR Sensor and BOLT wifi module

Controlling Lights using LDR Sensor and BOLT wifi module

Things used in this project

Hardware components

Story

WORKING of the PROJECT

Creating an account on Mailgun

Schematics

Connection on the bread board

EMAIL

Circuit connection

Connections on the bolt module

Code

MAIN CODE

Credits

Akash Auti

Comments

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