Unlock my car with my phone, Start engine, Start A/C, Anti theft using Arduino

(Last Updated On: February 13, 2020)

Unlock my car with my Phone


Unlock my car with my phone, Start the engine, Start A/C, and Anti-theft using Arduino-

In this tutorial, I will show you how to control your car wirelessly using your android cell phone. In this tutorial, you will also learn how to protect your car from being stolen. This project is based on an atmega328 microcontroller, the same microcontroller which is used in Arduino and HC-05 or HC-06 Bluetooth module. I named this project a Bluematic car, a car that can be controlled using an android cell phone and Bluetooth.

You can also watch a video Tutorial given at the end of this Article. Without any further delay let’s get started!!!

The components and tools used in this project can be purchased from Amazon, the components Purchase links are given below:

HC-05 Bluetooth Module: https://amzn.to/2KBx0Ph
Arduino Uno: https://amzn.to/2tVz1vu
Mega 2560: https://amzn.to/2ze1kdu
GSM sim900A: https://amzn.to/2LLeFzy
Neo 6m GPS module: https://amzn.to/32XCYiX
Mq-2 gas/smoke sensor: https://amzn.to/313Sx6O
Nodemcu esp8266 wifi module: Best price https://amzn.to/2NAvmiB
LM7805 Voltage Regulator: https://amzn.to/2IZEl5x
Potentiometer: https://amzn.to/2JSLbfg
330-ohm resistors pack: https://amzn.to/2NtlAeh
5v 2A adaptor: https://amzn.to/2GsNfcw
2n2222 NPN transistors: https://amzn.to/2EmXsIb
10k Resistor: https://amzn.to/2KTd6OW
lm7805 Voltage Regulator: https://amzn.to/2IZEl5x
330-ohm resistors pack: https://amzn.to/2NtlAeh
LDR pack: https://amzn.to/2m2khGR
female DC power jack socket: https://amzn.to/2KEo1gt
470uf capacitors: https://amzn.to/2xDCOzf
5×7 cm Vero board: https://amzn.to/2OHGbvn
female headers: https://amzn.to/2zqmtiJ
connection wires: https://amzn.to/2DpBuW7
Super Starter kit for Beginners: https://amzn.to/2KJvmKG
Jumper Wires: https://amzn.to/2KMoVXs
Bread Board: https://amzn.to/2MS4q8X
12v Adaptor: https://amzn.to/2Ntr6h1
PCB plate: https://amzn.to/2IUwpCt
Variable Supply: https://amzn.to/2MT4Qfj
Digital Multimeter: https://amzn.to/2Nvft9i
Vero Board / stripboard: https://amzn.to/2MTf9jD
Soldering iron kit: “best” You guys should definitely purchase this: https://amzn.to/2zfoNuJ
Solder wire: https://amzn.to/2ufUMWf
Wire Stripper: https://amzn.to/2KOqxfU
wirecutter: https://amzn.to/2ucIq14
PCB small portable drill machine: https://amzn.to/2Nu62XF


Please Note: these are affiliate links. I may make a commission if you buy the components through these links. I would appreciate your support in this way!

Bluematic Car:

I named this project as the Bluematic Car. Bluematic car is an app designed for the security of your Car. Bluematic car allows you to operate your car without even touching it. it has a number of features including, anti-theft, Ignition and doors unlocking, in case you forget your keys inside the car or you lose your keys while the car is locked, do not panic, take out your cell phone and using your cell phone you can unlock the doors. By enabling the anti-theft function nobody can start your car even if he has a key to do so. if you suspect anyone near your car, you can horn to scare the people away. This project is designed in such a way that even if someone removes the battery terminals, the car won’t reset, that’s how efficiently the anti-theft function works.

I have practically installed the circuit and it works perfectly

  • I can Unlock my car with my phone
  • I can start my car engine remotely using my cell phone
  • I can lock and unlock the doors.
  • I can turn on the car A/C using my android cell phone
  • I can enable my car anti-theft protection mode.

Now I can use my cell phone as the Car Key. This Car project really helped me to control and protect my car and I believe every car owner should make this project. If you follow this article completely you will be able to design your own car automation system using Arduino and a Bluetooth module. Or you can use my designed PCB to reduce the project cost. It’s just like the Arduino as I am using the same microcontroller “Atmega328”.

Block Diagram

Unlock my car with my Phone


  1. SolidWorks for 3D designing
  2. Arduino Uno IDE for programming
  3. Proteus simulation for basic circuit checking to confirm connections
  4. Eclipse for android application designing.
  5. Cadsoft eagle for PCB designing.

We tried to design this project according to the market requirements, for this purpose before building the hardware, first, we designed our hardware in 3d software called SOLIDWORKS. This designing really helped us in understanding the dimension of the components and then using these components within the defined area. for the complete hardware design, we had to make each and every component. After the design was final. then we started performing some experiments on the Bluetooth interfacing and basic commands transferring. we defined the credentials like pin code and its baud rate. after we completed the circuit then we started the programming to check our hardware. for the programming, we used Arduino Uno IDE. The heart of our project is the Atmega328 microcontroller.  The Android software is highly secured as it needs pairing code, and the login password. In the android application, we also defined different passwords for all the features. This android application can not be used for other cars unless new passwords are defined. each and every car will have its own codes, in order to make it highly secured.

Circuit Diagram:

Unlock my car with my Phone

Unlock my car with my Phone


Unlock my car with my Phone

Hardware Picture:

Unlock my car with my Phone

Download the Original PCB board file: Bluetooth

SolidWorks design:

Unlock my car with my Phone

The SolidWorks designing really helped me in understanding the dimensions of all the components. It was due to the dimensions that I was able to place the components with precise accuracy. If you want to learn SolidWorks then you can visit my YouTube channel “Electronic Clinic”.

Download the APK file of the Car control App:

Download APK file: unlock my car apk

Note: You can use the above cell phone App for free. The app source code is available only at 100 Dollars.

Arduino car project Programming:

For the complete explanation watch video tutorial given below.

At the end of this project, I was able to Unlock my car with my phone, I was also able to start the engine, open and close the doors, blow the horn, turn on the A/C, and activate the anti theft mode. This project was a success, you can watch the practical demonstration in the following video.

Watch Video Tutorial:

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About the Author: Engr Fahad

My name is Shahzada Fahad and I am an Electrical Engineer. I have been doing Job in UAE as a site engineer in an Electrical Construction Company. Currently, I am running my own YouTube channel "Electronic Clinic", and managing this Website. My Hobbies are * Watching Movies * Music * Martial Arts * Photography * Travelling * Make Sketches and so on...


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