I was looking to update my Bluetooth-connected ODB II reader, and I found that they now sell ODB II readers which connect via WiFi. (ODB II readers plug into a vehicle for reading status and error codes.)
Of course, this got me thinking about how that might be used in HA.
At this point I have no idea how they connect to a WiFi network, what format they might use to send and receive data, or whether any of this could be of value in HA. But I figured someone here might have already looked at it. There were some posts from a couple/few years ago, but nothing jumped out at me.