CANbus connection

[iancass]

Can somebody tell me where best to hook into the Canbus on a 2020 R1250GS and what's the pinout of whatever plug is suggested?

There is an unused 3 wire plug inside the front fairing, but I think this is LINBUS.

I'm trying to load some photos but it keeps telling me "can't load from this link"

 

[autogs]

So why do you need to access the can bus?

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[Santa-2512]

Or linbus for that matter

 

[autogs]

Er yea that as well!

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[RadioFlyer]

Anyone wanting to connect an aftermarket controller or wanting to sniff the CAN or LIN messages would want to know the easiest place to connect.

 

[autogs]

Right and how many people have done that apart from a ezecan or similar?
Wouldn't mind betting he just wants a switched live

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[RadioFlyer]

Right and how many people have done that apart from a ezecan or similar?
Wouldn't mind betting he just wants a switched live

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Well there is no shortage of people misusing the term that's for sure but I gave the benefit of the doubt.

 

[iancass]

To answer "Why" - I want to intercept the CANbus messages from the switches and other controls using an ESP32 and MCP2515 CAN module which I've already built.

I could also do this via LINbus, but I don't believe all switches are covered by that.

And I do know the difference between LINBus, CANBus and a switched live.

If you don't know then that's OK.

 

[SBD]

I guess the easy way to access CAN would be the diagnostics connector just ahead of the battery behind the RH side panel. The beauty of that is that there are compatible sealed connectors readily available.

The other option would be the connector under the pillion where the ezeCAN goes (there are pix on the ezeCAN website iirc). I think you can easily get those connectors too.

Out of interest, why do you want to sniff the bus?

 

[autogs]

To answer "Why" - I want to intercept the CANbus messages from the switches and other controls using an ESP32 and MCP2515 CAN module which I've already built.

I could also do this via LINbus, but I don't believe all switches are covered by that.

And I do know the difference between LINBus, CANBus and a switched live.

If you don't know then that's OK.

Ah a smart arse! Why didn't you explain yourself in the first post?

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[SBD]

I guess the easy way to access CAN would be the diagnostics connector just ahead of the battery behind the RH side panel. The beauty of that is that there are compatible sealed connectors readily available.

The other option would be the connector under the pillion where the ezeCAN goes (there are pix on the ezeCAN website iirc). I think you can easily get those connectors too.

Out of interest, why do you want to sniff the bus?

Forgot to say. Pinout of diagnostic is standard.

 

[iancass]

Thanks SBD,
I'll look at both those options.
You wouldn't happen to know which of the wires is CAN Hi and CAN Lo under the saddle? I've put a meter on the plug, the 2 outer ones are switched +12V (red/green) and -12V (Br). The 2 central ones (grey and blue) both just appear to be ~2.5V.

The more detailed response to "Why" is that I'm fed-up having to take my gloves off to to adjust the map on my phone (in the wireless charging cradle) when there's a perfectly good "Magic Wheel" controller on the left handlebar. So I've built a board which connects to my mobile via BT and pretends to be a keyboard and can send "-", "+" etc to the map app. I've also got most of the hardware and software sorted to be able to connect to a CANbus and filter out the messages from the Magic Wheel.

There is one commercial option I've found which can do this but it needs the NAV cradle to be installed. and its $200. The parts to build this are about $20

 

[Santa-2512]

Thank SBD,
I'll look at both those options.
You wouldn't happen to know which of the wires is CAN Hi and CAN Lo under the saddle? I've put a meter on the plug, the 2 outer ones are switched +12V (red/green) and -12V (Br). The 2 central ones (grey and blue) both just appear to be ~2.5V.

The more detailed response to "Why" is that I'm fed-up having to take my gloves off to to adjust the map on my phone (in the wireless charging cradle) when there's a perfectly good "Magic Wheel" controller on the left handlebar. So I've built a board which connects to my mobile via BT and pretends to be a keyboard and can send "-", "+" etc to the map app. I've also got most of the hardware and software sorted to be able to connect to a CANbus and filter out the messages from the Magic Wheel.

Carpe Iter have done it already

might save you some time

 

[iancass]

Carpe Iter have done it already

might save you some time

I'd not spotted that one. Thanks.

 

[SBD]

Thanks SBD,
I'll look at both those options.
You wouldn't happen to know which of the wires is CAN Hi and CAN Lo under the saddle? I've put a meter on the plug, the 2 outer ones are switched +12V (red/green) and -12V (Br). The 2 central ones (grey and blue) both just appear to be ~2.5V.

The more detailed response to "Why" is that I'm fed-up having to take my gloves off to to adjust the map on my phone (in the wireless charging cradle) when there's a perfectly good "Magic Wheel" controller on the left handlebar. So I've built a board which connects to my mobile via BT and pretends to be a keyboard and can send "-", "+" etc to the map app. I've also got most of the hardware and software sorted to be able to connect to a CANbus and filter out the messages from the Magic Wheel.

There is one commercial option I've found which can do this but it needs the NAV cradle to be installed. and its $200. The parts to build this are about $20

I don’t know which way round they are, but I doubt very much that it matters. If you’ve got it wrong, it’ll work badly, and if not…. Either way, it should not damage anything.

Otherwise put a scope on them, CANH will be between 2.5 & 4 V and CANL will be between 1 & 2.5 V, or thereabouts.

Do share your design when you’ve got it working

 

[RadioFlyer]

Ah a smart arse! Why didn't you explain yourself in the first post?

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There was nothing to explain. He asked a straightforward question.

 

[Bigcats]

I'd not spotted that one. Thanks.

I have a Carpe Iter and it does exactly what you require

But you could just buy gloves that have touch screen capability at a fraction of the price because it ain't cheap compared!!

 

[SBD]

There was nothing to explain. He asked a straightforward question.

Yeah, and got a smart arse answer…

 

[iancass]

Have managed to snoop the bus and can detect all movements of the Wonder Wheel - plus a few other things. So all the hard stuff done - I just need to work on packaging now. Cost so far ~ €8

 

[SBD]

Yeah, that laptop’ll be in your way