Serial Communication

[bko]

I think you should check the thread for Carloop, the open-source product Particle and OBD-II ports.

Carloop: connected car adapter

I wanted to make a compact internet-connected adapter for my car’s OBD-II diagnostic port. The Photon or better yet the Electron are great options for that. I found that the pins for a Photon luckily fit right in between the 2 rows of pins of a straight OBD-II connector so it’s possible to make a very compact OBD-II adapter with a Photon by interleaving the OBD-II connector and the headers for the Photon. Here’s the result: Carloop [image] More details, pictures, hardware files on GitHub I…

OBD-II is CAN bus, which is similar to serial but is multi-drop and requires a transmitter enable and differential signaling. Details of how Carloop does this are in their github repo which you can find in that thread.