# Should it be possible to read values from automotive sender units with an Arduino?

There are after-market sensors you can get for cars, for example, reading the oil temperature. You basically screw a sensor in and it has a little sender that goes to an electronic gauge.

Would it be possible to instead run these cables to an Arduino and infer the same information? I imagine so, but how would it be done? A lot of experimenting or would it be relatively straightforward?

I want to have a custom interface for this information combined with a Raspberry Pi and the auxiliary video input to a car stereo's display.

• You would need to get details of the sensor and work-out what interface circuit is needed to connect to the RaPi – Andy aka Feb 10 '14 at 9:40

• Its difficult to find a sensor that is not readable by ODB-II, like @Itj said. About the year, from Wikipedia: 1996: The OBD-II specification is made mandatory for all cars sold in the United States. The effort you will made its the interface, as ODB has a series of protocols, so you need to discover the one used for your vehicle. Also to note you are working with the vehicle central controller, not a good thing and/or inexpensive to let errors occur. – Diego C Nascimento Feb 10 '14 at 12:57