Bluetooth Call Notifier




About: So basically i am a crazy person, who loves to think the most odd way ever possible,who makes what he thinks and also let other also make those . Check out my crazy projects if you like do follow me :D


I was browsing instructables news feed some days ago when i came across this Project.

It was a cool project. But i thought Why not build it with a Bluetooth instead of complicated wifi stuff.

Specification of this Bluetooth Call Notifier

  1. Glows green on Incoming Call.
  2. Its easy to make
  3. works on Bluetooth, therefore phone can be charging while a call comes we wont miss to notice it .
  4. Color can be changed on will
  5. Glows red on Missed call

What motivated Me to make this

Basically when i work i keep my phone silent most time to avoid distraction , but since it silent i don't notice the calls that i missed,some of them are after seeing the project i was inspired to make one for me but better and cheap.

Also like my page for support

Step 1: Lets Collect the Parts We Need at First

The first list is of the electronics component and second for the craft.

Second List for the case.

  • Art paper (I used black ).(buy it from a local store)
  • Xacto Knife/Hobby Knife
  • A logo to used i download it from a store

Step 2: Electronics

The Circuit Diagram is very simple to understand.

The Bluetooth module serially communicates with the arduino and then tells it what is the data received.

For a incoming call we receive 'C'

For a missed call we receive 'M'

According to the data received the arduino fades the green and red lights.

The RGB can be changed with a red and green led also.

Note:I used Common cathode RGB so the program given here needs slight changes if you use common cathode and before burining the program make sure the arduino's rx and tx are disconnected from the bluetooths ones.

Step 3: Installing the App

Download the app from this link.

Steps to Install the App.

  1. Go to settings.
  2. Go to security
  3. Turn on Unknown Sources.
  4. Click on the file.

How to use the App.

  1. Click On Connect Button.
  2. Choose the HC-05 Module.
  3. Enjoy the Show :P

Step 4: Creating the Case

  1. I started by drawing a template on the Art paper.i selected 50mm square cube for the job.
  2. I made the cube with downside hollow.
  3. Then using a Xacto Knife i cut the template.
  4. then i joined all the side except the top layer
  5. I drew the clip-art i downloaded on the top layer.
  6. Again Using the Xacto knife i cut the Clip-Art
  7. Then i take a tracing paper and trace the template all on it.
  8. I cut the tracing paper and paste it to top side from inside.
  9. Lastly i joined the last surface and complete the Cube

Step 5: The Last Step

Simply Put the case over the LED And enjoy.

Future Up gradation.

I am Trying to bring A priority mode. And Making it in a Compact space.
If You like it Please Vote for me and Follow me .

Check the video



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    23 Discussions


    Question 4 months ago on Step 3

    Where can i find code for this app?


    Question 6 months ago on Step 1


    I take it you used Mit app inventor to create the app.

    Do you mind sharing the blocks diagram.

    I have a simular project in mind. I Can control the arduino with a mit app. But cant get the incoming call to send request.



    Question 10 months ago on Step 5

    Please make a Android app which send all notifications to Arduino on a lcd with Bluetooth.....


    2 years ago

    Can you also make the notifier to display who is calling and a text on a screen?


    2 years ago

    Can you release the AIA source code, please?


    2 years ago

    i am facing trouble in code. the notifier showing both of lights at a time, if we missed a call the red led starts to fade but green led remains also on.

    help me to fix this problem

    2 replies

    Reply 2 years ago

    you had some connections issues

    Mayannk geekrex

    Reply 2 years ago

    all the connections are formed as per your instruction for 3 times but facing same problem


    3 years ago on Introduction

    just to clarify did you use common cathode rgb? or common anode? what are the changes to be made in code? thank you! :)

    6 replies

    Reply 3 years ago on Introduction

    Hi Paolo I am using RGB common anode for this build, but if you are using common cathode u need to alter the code by LOW to HIGH and vise versa


    Reply 3 years ago on Introduction

    Ya U can use hc-06 also as the project is using only slave mode .
    Is there any thing more PaoloC12

    Vince A.R

    3 years ago on Introduction

    Is it possible to have a notification when messeage is recieved on facebook or facebook messenger? And tweet from twitter maybe? But anyways nice instructible Thanks you very much? :)

    1 reply
    geekrexVince A.R

    Reply 3 years ago on Introduction

    ya it can be made so, Since i am not a pro in android i didn't go for the other notifications but it is possible


    omg wat a simple thought can be mold into some cool stuffs..#proud to be a frnd with u.:) :)