3 ms·

> I'd pay to just not have one, but I'm not even sure that's possible any more. Yeah, some stuff makes you go through the head unit on some machines. Any repl

by RajT88 3y ago

> I'd pay to just not have one, but I'm not even sure that's possible any more. Yeah, some stuff makes you go through the head unit on some machines. Any replacement head unit would have to implement the same controls somehow. Wealthy will be the person who makes a generic 2 DIN head unit, where you have physical buttons which you can map to various CANBus messages.

dotancohen 3y ago
I'm working on a generic device that sends canbus messages, that can have inputs such as potentiometer, push buttons, toggle switches, and rotary encoders. My end goal is to have real hvac controls on my Tesla, but I'd like to abstract the device as much as possible. Fun project, and most of the hardware necessary is already out there.
- Scoundreller 3y ago
  The dream: https://www.amazon.ca/Honeywell-CT87N1001-Round-Manual-Thermostat/dp/B000FCCZ5Q https://www.amazon.ca/Honeywell-CT87N1001-Round-Manual-Therm...
- djbusby 3y ago
  Awesome! I demand links! Give me a GitHub I can watch and contribute too. My soldering iron is already hot! LFG!
- freedomben 3y ago
  That is super badass and I'd love to have something like that. Does the factory display/controls use the canbus to do their work? How much stuff can you reasonably do through that? Do you know if it varies between manufacturers?
  - CamperBob2 3y ago
    The problem is, there's not just one "CAN/LIN bus." There are probably a dozen different segments. One device attached to one segment can only talk to the upstream gateway and whatever peripherals are on that bus segment. Of course this isn't a problem per se, it's good design -- but it has the side effect of making it harder to hack your own car through a single point of entry other than the main OBD2 port, which is connected to the top-level gateway.
    - freedomben 3y ago
      > it has the side effect of making it harder to hack your own car through a single point of entry other than the main OBD2 port Thanks! Do you know by chance if the OBD2 port can talk to/control everything? Would that be a good entrypoint?
      - CamperBob2 3y ago
        In my own VW group cars, the CAN bus pins on the OBD2 port do have access to everything. I don't know if that's true for all/most cars in general, though.
- guidoism 3y ago
  I've been hoping somebody would do that. I have a only half-joking business idea to build high-quality physical controls for all of the crap touchscreen shit being forced upon us. High-end ovens for example rarely now include physical controls so (I'm looking at you Miele) so I would like an aftermarket thing that sticks on to the outside of it. Maybe even directly over the touch screen. Actually, hmm, that's a good idea. Maybe we need a device that is the size of various standard touch screens that can read the contents of the screen, interpret them, and then have some sort of way to do capacitance touch on the screen. All of this of course hidden from the user who just wants a damned analog knob.
- pierat 3y ago
  You're touching on a real opportunity, going down a open hardware canbus-dash computer. This is one of those rare 'holy shit do this right now' kind of things.

by RajT88 3y ago

dotancohen 3y ago

I'm working on a generic device that sends canbus messages, that can have inputs such as potentiometer, push buttons, toggle switches, and rotary encoders. My end goal is to have real hvac controls on my Tesla, but I'd like to abstract the device as much as possible. Fun project, and most of the hardware necessary is already out there.

Scoundreller 3y ago
The dream: https://www.amazon.ca/Honeywell-CT87N1001-Round-Manual-Thermostat/dp/B000FCCZ5Q https://www.amazon.ca/Honeywell-CT87N1001-Round-Manual-Therm...
djbusby 3y ago
Awesome! I demand links! Give me a GitHub I can watch and contribute too. My soldering iron is already hot! LFG!
freedomben 3y ago
That is super badass and I'd love to have something like that. Does the factory display/controls use the canbus to do their work? How much stuff can you reasonably do through that? Do you know if it varies between manufacturers?
- CamperBob2 3y ago
  The problem is, there's not just one "CAN/LIN bus." There are probably a dozen different segments. One device attached to one segment can only talk to the upstream gateway and whatever peripherals are on that bus segment. Of course this isn't a problem per se, it's good design -- but it has the side effect of making it harder to hack your own car through a single point of entry other than the main OBD2 port, which is connected to the top-level gateway.
  - freedomben 3y ago
    > it has the side effect of making it harder to hack your own car through a single point of entry other than the main OBD2 port Thanks! Do you know by chance if the OBD2 port can talk to/control everything? Would that be a good entrypoint?
    - CamperBob2 3y ago
      In my own VW group cars, the CAN bus pins on the OBD2 port do have access to everything. I don't know if that's true for all/most cars in general, though.
guidoism 3y ago
I've been hoping somebody would do that. I have a only half-joking business idea to build high-quality physical controls for all of the crap touchscreen shit being forced upon us. High-end ovens for example rarely now include physical controls so (I'm looking at you Miele) so I would like an aftermarket thing that sticks on to the outside of it. Maybe even directly over the touch screen. Actually, hmm, that's a good idea. Maybe we need a device that is the size of various standard touch screens that can read the contents of the screen, interpret them, and then have some sort of way to do capacitance touch on the screen. All of this of course hidden from the user who just wants a damned analog knob.
pierat 3y ago
You're touching on a real opportunity, going down a open hardware canbus-dash computer. This is one of those rare 'holy shit do this right now' kind of things.