This Arduino sketch is specifically made and tested for a Volkswagen Golf MK4 GTI, but it will most likely work on older cars as long as the immobilizer is removed/defeated.
You will need to have a neutral switch in your car if it is a manual car, you can easily connect this switch to an arduino pin.
Our Arduino Sketch requires a SIM card-reader that you can send SMS messages to. We wrote the sketch specifically for the sim800l gsm module. We recommend using a prepaid card for your sim, as it is free to receive messages.
These items are required for our sketch to work.
💾A sim-card module that can read and send messages
📱A phone that can send messages
📲A sim-card that can receive messages
⚙️A neutral-switch in your car
🖨️A 3D-printer to print our case for the arduino and a relay-box
Use our sketch
To use our sketch, you will need to upload our .ino file to your arduino-board. Make sure you've changed all necessary values before uploading and that you've properly hooked the arduino to your sim-reader and your vehicle before powering on the arduino.