Installing Biometric Entry System on Toyota C-HR




A few months back my daughter asked me, why even the modern day cars are not equipped with biometric entry system,
when even a cell phone is having it. Since then was working on implementing this and finally managed to install and
test something on my Toyota C-HR. Guess this is the first Toyota C-HR with an actual Key-less Entry System.

Here is an attempt to install such a system on Toyota C-HR. This taps on the existing CAN bus customisation module
I already installed for sending door locking/unlocking message to the Microcontrollers, a link to which is already
made available in the site.



Now to the details of the project...

The heart of this project is a CAN Bus Shield hooked up to an Arduino UNO board, and to which fingerprint sensor is wired to

CAN Shield
Finger print sensor modules are actually readily available in market and can be purchased online from Aliexpress.
The one I used in this project is from a company called GROW (link to the site is https://hzgrow.en.ecplaza.net/)
Detailed Instructions comes with the module, explaining how to add finger prints. Connect the module to appropriate power
source and test before installation

Fingerprint Module

A door handle cover is purchased and a hole drilled to it and further shaped to fit fingerprint sensor.
Fingerprint sensor module is properly glued to the back of handle cover and waterproofed using rubber based adhesive.
Fingerprint Module

Fingerprint Module

Fingerprint Module

Fingerprint Module

Fingerprint Module

Now draw the wires from the fingerprint sensor module to the controller as show in video. Also hook up the controller to
arduino board as show in the schematics(can download below)

Fingerprint Module

Using USB cable connect Arduino to your PC and upload the sketch to the boards using Arduino IDE. Fingerprint Module

Now you are all set to go
The controller, based on fingerprint matching or not, will drive a relay to high (if success), which is the input to pin 3
of arduino. The code running in arduino, depending on the pin status and other parameters, will either send the door close
or door open CAN message.
The complete schematics is given in link given below.

Get the schematics/source code from the links below

Arduino Sketch for UNO

Schematics

Please drop me a mail if you would like to know more about this project