KWP71 Compatibility about obd9141 HOT 2 CLOSED

Also found this http://www.internetsomething.com/kwp/

from obd9141.

I think its based on the ISO9141.
I also found this repository that also mentions the ISO9141:

It mentions ISO9141 because the physical bus characteristics are similar / identical. The protocol itself looks different; 9600 as baudrate, every byte is echo'd back inverted and it doesn't look like there is a checksum, all of which are key differences to ODB9141-2.

Also is there any board that I can use directly with arduino? without the need of soldering?

The SN65HVDA series chips are usually K-line transceiver chips, so that could very well work if the physical bus is identical.

Do you think this would work with an ECU that uses the KWP71 used on some older bmw ecus?

I don't think this library will really work for this protocol. I'd start from scratch, or use the kwp71scan repo you found, the actual protocol implementation seems to be grouped in these free functions, so you may be able to pull that out without too much problems and reuse it.

Good luck with your project!

from obd9141.