Project Chimr

This is a project that my hackathon team made in Wildhacks 2015. We won “Best Communication Hacks” nominated by Twilio. More details of the project can be found here.

Simple, secure, and trendy-looking box that's easy to install

Chimr Smart Door Security System

Chimr is contained in a secure cardboard casing with ‘stylish’ skin that is up-to date with the current trend. It is very eye-catchting so that guests will take notice which compells them to look at the box. Chimr sensor will then recognize the person then notify the residents via text. Chimr box is also self-contained. Chimr’s internal system is complete with wifi adapter that connects it to the internet, sensors, and LCD screen to show texts to the guest. Chimr is easy to set up, securing it in your front door would be as easy as taking out garbage, just put it in front of your door and nobody will try to steal it.

Get Notifications Anywhere and Anytime

Chimr is connected to the cloud. Once you put your number in the Chimr system, wherever you are, you will have notifications if a guest is detected in front of your door. Chimr have a dedicated website so putting your number is as easy as typing a google search.

Chimr system accomodates multiple accounts to be notified. Simply add numbers to the dedicated Chimr website, and you are set.

How Chimr Works

Chimr is a doorbell which, when pressed, will buzz and then send a text message straight to your phone telling you that someone is at your door. You can then choose to respond to this message (to let the person at the door know that you’ll be out in five minutes) or you can ignore the message. This allows for all of the convenience and utility of a regular doorbell along with the modern capability of receiving text messages. This is helpful in situations where a traditional doorbell fails, such as: when you’re not home, when you’re in a part of your house where the doorbell can’t be heard, etc.


Our initial design was a motion sensor which would alert the homeowner that someone is at the door. We were designing this with the Intel Edison. However, this design is still very buggy and as such we went with a different approach — a button (“doorbell”) which connects to an Arduino board. Upon being pressed, a POST request is sent to a server which then sends a text message to the homeowner through the Twilio API. The homeowner can then respond to this message through another POST request which then writes the message to an LCD screen which is on the door. The server and web application was designed with Python and Flask; the circuitry used was Arduino; the API used was Twilio.

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