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Is it possible to data-log the info on the "4x4 Info&qu

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rubot

Member Since: 16 Mar 2016
Location: San Diego, California
Posts: 27

I've made a little progress:

I decided to follow Sparkfun's hookup guide to get my feet wet since i wasn't entirely sure what to expect (https://learn.sparkfun.com/tutorials/can-bus-shield-hookup-guide). I'm using their Sparkfun Redboard and Can Bus Shield. It was surprising easy to begin seeing can bus messages.

My plan is:

I've hit a couple obstacles:

Land Rovers have more than one can bus. With my current hardware I can only monitor one at a time. I should be able to consult the service manual to see which controllers reside on each bus. Eventually I would like to monitor all. The solution for that might be multiple micro controllers or a custom shield. I almost purchased the seeed studios can bus shield since it would allow me to stack multiple shields on the redboard but it would have to ship from china and i was anxious to get started.

I have been able to record messages and play back but i'm not getting the desired result. for example, i tell the micro controller to start recording. The i push a button such as the door lock. Then i stop the recording and replay it. In theory the same behavior should occur, the doors should lock, however its not. I suspect i'm not properly composing the messages before replaying them and the ECUs are ignoring it. I've tried two different programming libraries and both produce a different result when i parse the message ID. I'm looking for a way to see the RAW message so i can determine which library is properly handling the message.

Anyone out there have an example can bus message? I'm specifically interested in the length of the message ID.

sorry for the long post. I might move further discussion to its own thread or something later.

21st Apr 2016 6:35 pm

Sidestick

Member Since: 22 Apr 2012
Location: Rome
Posts: 2309

2008 Discovery 3 TDV6 HSE Auto Java Black

Try to send a PM to "alex Pescaru" or make a search on his posts here on the forum,
he could be the right man for you

- Easy-Lift suspension module 4.0
- GoodWinch 9500 lb
- Full underbody protections
- Tree/Rock sidebars
- Prospeed roofrack & ladder
- Compressor guard
- Raised Air Intake
- Driving lights (2+4)
- 50 mm Waffle boards
- Altox Heater control
- Overland Rooftop Tent
- Rear seats entertainment
- Front & Rear camera
- GVIF
- Removable tow bar
- Cubby box fridge
- BFG KO2 265/65R17
- iidTool BT

21st Apr 2016 6:41 pm

rubot

Member Since: 16 Mar 2016
Location: San Diego, California
Posts: 27

Last edited by rubot on 21st Apr 2016 8:14 pm. Edited 1 time in total

21st Apr 2016 8:10 pm

rubot

Member Since: 16 Mar 2016
Location: San Diego, California
Posts: 27

Sidestick wrote:
Try to send a PM to "alex Pescaru" or make a search on his posts here on the forum,
he could be the right man for you

I looked for posts from alex_pesacru. Found this one: http://www.disco3.co.uk/forum/topic102801.html?highlight=can+bus

...mind...blown... Alex has the answers. Thanks for pointing me in the right direction.

21st Apr 2016 8:12 pm

rubot

Member Since: 16 Mar 2016
Location: San Diego, California
Posts: 27

Started a new topic similar to this thread regarding acquisition of the data from the can bus. With a focus on the 4x4 screen: http://www.disco3.co.uk/forum/topic145750.html.

17th May 2016 8:34 pm

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