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I have some code laying around somewhere for communicating with proprietary requests such as knock, oil temp, and some other misc ones using J15765 communications using an MCP2515 & MCP2551 chipset. I never got around to finishing my setup and i was really torn between where I was going to install my display as well. I am a huge fan of having the minimal gauges in my car and figured I would just make my own setup so i could toggle things on and off for diagnostic purposes. I was looking into sticking a small 1.3" oled into the driver side vent at one point.
I never finished the code but did manage to make some progress. I also was making progress using an STN based chipset (ELM327 replacement) and was working with ST trying to resolve an issue with using raw data not coming in correctly to make a cheaper / easier solution for working with SSM like setups.
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