A ESP32 project for interfacing with fortin remote starter and car alarm systems via the antenna data-link interface.

It will connect to your home wifi and be interfaced by MQTT. This way it allows users to connect their car to things such as Home Assistant.

This poject originated as a means to capture, analyze, and explore the data-link protocol used by Fortin remote starters and alarm system. A unintended, but 'fun' side effect of this work was a code base which could be used as a cellular remote or wifi remote for the system.

Ok, so you don't need any of this, but this is what I found worked best for me.

2 diodes if you are hooking up mulitple attennas to the data-link bus all but the primary antenna should have a diode on the tx line. If you don't plan on impersonating the remote starter you only need one diode.

Level Shifter Particle MCUs (photon, electron) use 3.3v logic levels. While the Fortin remote starter uses a 5v logic level. Thus if you don't want to fry your Particle you will need to convert the 5v signal from the remote starter to a 3.3v signal and vice-versa.

Electron or Photon The electron has more uarts than the photon, as such it is capable of monitoring the data-link connection in both directions.

5v regulator If you are using an electron you will need some way to provide a 5v reference to your level shifter. DO NOT use this to power the photon from the data-link 12v-14v source. If you need to power a photon you should use a buck down DC->DC power supply, or other USB power source.

This image shows the pinout of the data-link port on the Fortin Evo-One

This schematic for using electron with ORS

While the code written for the ORS project is distributed under the BSD 3 clause license depending on how this project is compiled it may include the AssetTrackerRK library which is under a different license. If you intend on distributing a compiled version of this code please respect the licenses of all dependencies.