Arduino in an XC90 - who wants to join me?

[Bonefishblues]

Would a chimp with a hammer be of any use in your enterprise?

PM me if yes. I have my own hammer

[SiliconS]

Interesting project! I can't help, but I'm very interested. Please post updates as you make progress.

[SwissXC90]

So here's my first update:
1. Dusted of my Ardunio Uno board - literally, it was covered in dust. Shame on me.
2. Updated my Ardunio IDE to v1.8.5
3. Installed the mcp2515 library and various other CAN bus libraries
4. Studied some examples
5. Started writing my first example code to get debugging working

First output:
Welcome to SwissXC90's VolvoXC90 CAN of Worms Example
Version: 09 Jan 2018
0
1

Yeah it's not much but I've got to get the debugger working first before anything else, so gotta make sure the Serial.println() is working and understand the basic structure.

Next steps:
Research the code to use with CanHacker Windows software

Solder the headers onto my CAN bus board - I have this one:
https://www.seeedstudio.com/CAN-BUS-....2-p-2256.html

Try it!

[SwissXC90]

OK, managed to decypher and understand the source code of some examples. Heavy going, especially when the original example is very sparsely documented.

My Ardunio code compiles and produces:

Welcome to SwissXC90's VolvoXC90 CAN of Worms Example
Version: 09 Jan 2018
Can't Init CAN

Which is exactly what it should do as the CAN interface is not yet built.
This is all desktop stuff at the moment, haven't touched the car yet.

Enough for tonight, off to bed.

[GreenBrick]

I'm looking at replacing the ECU in my pickup with a Speeduino (Arduino based standalone system) in the future.

I will follow this, as I am also interested in the CAN stuff.

[GreenBrick]

So far I have got a dallas button working to use as the immobiliser key.

[SwissXC90]

You're a few steps ahead of me then

[SwissXC90]

A mixed bag tonight

Went to solder the headers onto the CAN interface, and found I'd lost a header. Swore and cursed and hunted and eventually found it. Fitted the headers.

Connected to the Arduino and tried to initialise the CAN interface. Init failled. Scratched my head and thought hard and then realised I left of the ISP header, not thinking it was needed.
So soldered that on.

Tried again. Init fail.
Googled and hunted and tried a few things.
One post said sometimes an external supply works.
So got my 12V supply, and connected it, and OOPS - laptop crashed.
Thats not good. Static / voltage leakage and all that.
Rebooted laptop, picked up Arduino and OOPS - Arduino regulator smoking hot.
Thats not good.
Disconnected everything pronto, let it cool, reconnected it.
Ardunio dead.
Won't run, won't reset.
Drats, I thought these Arduinos were foolproof. Obviously not.

Grabbed my 2nd Arduino (clone)

Fitted the CAN board.
Tried to init. Init fail.
Googled
Changed CS from pin9 to pin10
Tried again and....

Enter setting mode success
set rate success!!
Enter Normal Mode Success!!
CAN BUS Shield init ok!
In loop

Finally!

Then went back to the dead Arduino, checked the regulator- Shorted input to output. All the 5V components had 12V on them. Dead. Totally. Damn. Better buy a few spare Arduinos then....

OK, that's enough for tonight, off to bed.

[SwissXC90]

Just bought 3 x replacement Arduino clones

They cost around 6 EUR each. incl shipping!

[SwissXC90]

So today after having prepared myself with sufficient information, my Ardunio and CAN bus shield, some cables, my laptop and a battery charger, I went down to the garage

Opened the boot of the XC90
Connected the battery charger to the power outlet in the boot to ensure I don't get a flat battery.
Opened up the boot floor
Removed the rear quarter side panel to access the REM and the Parking Camera PAC (which I have). I had already determined the PAC was the easiest place to get into the active low-speed CAN bus.
Disconnected the connector from the PAC (with ignition off, as the PAC is only powered with key in PosI and PosII)
This connector has PosI ACC power, Ground, CAN-H, CAN-L and nothing else
I connected the Ardunio CAN shield to the CAN bus
Nothing. Drats.
I check the connections, all OK

Then I thought: maybe the CAN bus is not active?
I turned on the Ignition and BINGO - the CAN activity LEDs on the CAN shield started blinking and the CAN messages started appearing on my serial power monitor.
Success at first connection!
I had already set the bit rate to 125000 bps (the Volvo low-speed CAN runs at 125kbps)

Currently, I am just printing the messages to the serial port to show them on my PC

And logging them like this:
"13.01.2018 13:32:35",ID: 0 Data 0 0 0 0 0 0 0 0
"13.01.2018 13:32:36",ID: 42 Data 96 48 0 64 7 0 25 0
"13.01.2018 13:32:36",ID: 190 Data 128 49 64 6 0 160 160 2


Here's is what I learnt so far

• When the vehicle is asleep, the CAN bus is not active (logically)
• Pressing the Yellow button on the remove wakes up the CAN bus and messages start appearing for 25 seconds. After 25 seconds, the messages stop. After 30 seconds, the CAN bus goes back to sleep
• The first wakeup message is ID 0, with am empty packet (all 8 data bytes are 0)
• Pressing a remote button, opening any door, putting the key in the ignition - all these activities wake up the CAN bus.

I am now modifying my Arduino code to use with a CAN bus sniffer program I grabbed from the net, to save me writing my own sniffer....

Back to the garage I go....