This is my version of retepsnikrep OBDIIC&C Gauge
What I'm doing is using an Arduino Nano to piggyback on to his PIC to control an RGB LCD. This will give visual information such as changing the LCD to green when in lean burn or changing it to red when there is an error condition. Normally this is done with small LED's but I think an RGB LCD would be more fun and better for visual cues as to whats going on.
It is also my plan to pass the serial logging feature of the gauge through the Arduino and output it through USB. I could also do other things with the serial data within the Arduino if needed. For an example change the colour of the the LCD on what ever the specified parameter is when its seen in the serial data stream.
The PIC part of the gauge may be closed source but the source for the Arduino end will be open and freely available. I will post the source as soon as I get the basic features set and working.
I will be posting pictures as well as schematics of my modifications as soon as I get around to it.
While I gather my stuff up and organise it to post here I'll leave you with a short video of my progress.