VOLT / AMPERA support - Githubissues

liebefuroscar commented 5 years ago

Opel Ampera / Chevrolet Volt users need to be included with priority:

Preclimatization (OBD MX already has it)
Load amperage selection

In a less priority way:

The estimated autonomy is displayed (show 0)
Tire pressure shown (show 0 psi)
The motor temperature is displayed (show 0)
Odometer Km shown in the app (show 0)

We are many users of Opel Ampera / Chevrolet Volt with OVMS that we miss these functions, which already has, for example, Tesla Roadster or Nissan Leaf.

I am also sure that if these features are added, many more users of these VE will buy an OVMS. Thank you

raulcorreo commented 5 years ago

Por favor, necesitamos estás funciones. Hemos confiado comprando el dispositivo... Creo que lo merecemos....

markwj commented 5 years ago

We are limited by what the car can show on the CAN BUS, and what we can decode (or discover) as available. Very willing to implement these features, but we need the codes (which are not publicly available).

lolvince commented 5 years ago

Did you already see that ? https://m.youtube.com/watch?v=xcfdSGDaqfs

mjuhanne commented 5 years ago

I'm in the middle of implementing extended Volt/Ampera support for OVMS (see my fork for preliminary work) and I'll make a pull request when it gets more stable and is usable on the mobile app. However most of the interesting stuff and functionality happens on Single-Wire CAN (SWCAN, Low speed GMLAN) bus and unfortunately the CAN transceivers OVMS uses (MCP2515) won't be able to drive SWCAN with full functionality. It should be able to read and write CAN messages without bus errors, but waking the car (for unlocking/locking doors, remote heating, getting metrics updates etc) requires driving the SWCAN bus to 12 volts (High Voltage Wake Up) and this MCP2515 is unable to do. To fully utilize OVMS on Volt/Ampera, a proper SWCAN transceiver is needed (like TH8056), so I ended up designing an add-on SWCAN board for OVMS. The actual hardware now works on my Ampera, but software side needs more polishing. At this stage everything is very experimental, so if anybody's interested, you do need some DIY/tinkering skills to produce the pcb, source the components and hand-solder the SMDs.. So definitely not ready for end-users yet :)

SirSheik commented 5 years ago

Good job mjuhanne In Spain there are many users who would be interested. Would it be possible to ask a company to mount the board? Thx

jinnatar commented 3 years ago

Any updates here @mjuhanne ? Did you get anywhere with the hardware?

mjuhanne commented 3 years ago

@Artanicus Hi,

I haven't done any development or testing using OVMS for over year now since I sold my Ampera and bought a Tesla Model S, but I can comment on its status back then:

The add-on SWCAN HW board works ok, but the OVMS firmware needs to be rebuilt with a special support for the board.
The board itself is needed if you need to wake up the car in order to poll the car status or the turn on the heater
I remember that most of the useful CAN messages were deciphered and processed (outside/cabin temperature, alarm status)
Unfortunately the MCU in my car (Finnish MY2014) would not respond to Onstar CAN messages (commands to turn on heater/preconditioning, lock/unlock doors etc). This may be because there was no Onstar module installed in the first place and most likely the main MCU was not configured to respond to those commands. The Onstar CAN messages OVMS sends are identical to the ones used by MyVoltStar, which I also used but with no luck. So I would assume that if you can use MyVoltStar to control your car with success, it can be done with OVMS+SWCAN board as well (but I haven't heard any success stories so far)
I was able to turn on heater/preconditioning using diagnostic CAN commands sniffed from GDS2. There's a configuration for using them on OVMS as a kind of backup solution, but I found the diagnostic commands to be quite finicky (heating would turn off automatically after a while and forcing the heating back again resulted in variable success). Lock/unlock doors using diagnostic commands worked too, but the alarm wasn't disabled so opening the doors would result in alarm going off :) I did not find a way to disable alarm using CAN commands.

In summary, if MyVoltStar can be used to control your car then OVMS+SWCAN board combo might be worth your while. Otherwise you are stuck with just status updates which are IMHO not that useful (In my case 95% of the occasions I use Tesla app is for climate control).

RobTuckfield commented 2 years ago

I've got a Volt with an OnStar module, if you need someone to test.

I'm a decent Python dev, and lately I've been trying to learn this car stuff, but I don't think I can contribute much to the code.

melaz commented 2 years ago

Hi community, is there any updates? Or something I can help? Recently bought Chevy volt 2013 and ordered ovms. How can I help with developing?

markwj commented 2 years ago

We are trying to produce a standard SWCAN board. See here:

https://github.com/openvehicles/Open-Vehicle-Monitoring-System-3/issues/704

Once that is produced, then perhaps a developer will step forward to see what can be done with it on the Volt/Ampera.

openvehicles / Open-Vehicle-Monitoring-System-3

VOLT / AMPERA support #196