CAN Diagnostics Logger with Arduino CAN shield

have added to files: https://cdn.hackaday.io/files/12644540960896/LOG40.CSV

first full working commit has been made to github

So here is my first build of the standalone device, Some LED and an LCD for status display and a sd card for logging to csv.

The individual components:

Gearbox ecu pinout: https://en.wikipedia.org/wiki/AWTF-80_SC

Diagnostics tool used for citroen:

Diagnostics "double adapter" so a can monitor the traffic between diagnostics tool and car ecu's::

The Arduino CAN bus shield:

Adapter for shield to diagnostics port:

The Car im working on:

So i got some results, found this nice program to graph csv, this is results of B1, C1, C2, C3 against gear shift over time. http://www.datplot.com/ now just have to get the gearbox to play up while logging.

Things are going great, im nearly done on the arduino script.

Using CAN Hacker i was able to locate 3 key CAN message ID's of interest to me,

1. one with general gearbox state that is transmitted all the time 0x489
2. one that is used by the diagnostics tool to transmit, 0x6A9
3. and one that is used by likely the BSI to reply to requests by the diag tool, 0x689

I was then able to 'decode' how the readings where being sent back by looking at changes while triggering a change in the reading via a switch or gear shift.

And put this all into an arduino sketch to emulate the process of requesting diagnostics readings, 'translating' them into readable data, and displaying/logging them for review.