Headland Turning System over CanBus

Hardware CanBus
12

Hi everyone.

So I read the discussion again today and hopefully it’s starting to make a little sense to me. With your permission, I’ll try to present how I understood it, I’d be very happy if someone could try to tell me where I’m wrong.

according to Case Niew AFS Connect canbus
I understood that there is not one single CAN bus in the tractor but several

CAN Bus 1: VEICOLO 500 Kbits/s

CAN Bus 2: EHR/ITBV 500 Kbits/s

CAN Bus 3: PCM/GUIDA AUTOMATICA/STERZO AVANZATA 250 Kbits/s

CAN bus (motore): MOTORE 250 Kbits/s

or
CaseIH_GPS.pdf

I’m sorry, I wrote that I’m probably missing something :slight_smile:

Furthermore, I think I understood correctly that Teensy has two CAN interfaces. Where one serves as a branch for the actual tractor control with preparation and the other is free, let’s say for peripherals.

Then I came across that @andyinv in the thread Engage AIO boards via CANBUS is solving the steering button on the multifunction lever.

Assuming:

  • My tractor configuration is not equipped with Autosteer, I steer via a hydraulic block.
  • If we assume that the Autosteer and HTS buttons on the multifunction lever are on the same CAN.
  • Isn’t the CAN bus a two-way communication? When I press a button on the multifunction lever (for example Autosteer or HTS), both the tractor and possibly the other participant, Teensy, will know about it.

So it is theoretically possible that if according to the findings Steel181 we know the commands of the multifunction lever, we can also tell Teensy what is going on here?

The result would be that the section control in AGO would start the HTS of the tractor (I don’t program what I want to do with the tractor on the headland there), at the same time, when I press a button on the multifunctional tractor, the AGO would know that the section is on or off and so the work switch would also be switched.
I also found a thread Work switch coverage mapping where @CommonRail comments on the solution for a three-point hitch. The problem is that not all machines I use are connected to a three-point hitch. That’s why I would like to control the work switch defacto using HTS.

And as a bonus, the button directly on the lever would also work, which is relatively well ergonomically placed.

Thank you in advance for your comments.

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