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I'm having a pretty big problem with charging. I have the Orion BMS2 and the Tesla Gen2 charger (V1.19). I've connected the proxy and pilot to the BMS. As soon as it's plugged in, it activates the charging pin and switches on the Tesla charger via pin A3. The same pin is also fed to the Zombieverter at GP12V to activate the pumps, but unfortunately, the charger isn't charging. The pumps start running, and the Zombie also switches to charging mode. Or could it be that the proxy and pilot must be connected to the Tesla charger?

medo wrote: ↑Fri Nov 21, 2025 6:30 pm Or could it be that the proxy and pilot must be connected to the Tesla charger?

Yes as said before a few times.

https://openinverter.org/forum/viewtopi ... 243#p80243

I've already tried that, the problem is that the contactors need to be closed to start the charging process. Unfortunately, it seems that output A6 only becomes active when there's voltage present, in order to control a relay so that the BMS and the zombie go into charging mode. Or am I doing something wrong?

Yes there are differences in the SMT32 version. The V5 board and R1.19 were:
1.there never is an output before enable is present
2.ACpresent only turns on when EVSE is on

My version of the software had, ACpresent go high when the evse is detected.

So no way of detecting the plug is in via outputs.

Oh man, this is getting complicated, what options do I have now?

Enable always high.

Then the HV request output can be used to put BMS and Zombie into charge mode.

Correct ways to fix:
1. Someone makes the change to the ACpresent output to function before enable needs to be present
2. Someone finishes the work on the CAN integration for the Zombie and Tesla Charger V5 boards

Won't that drain the 12V battery if it's constantly switched on?

Does your software do that?

Unfortunately, compiling isn't working for me, I have no idea why.

Correct, so will many other things like the zombie

https://github.com/Tom-evnut/stm32-teslacharger

EDIT: Note I do not have a charger to test on so use at your own risk.

Here is my rework of the stm32-teslacharger firmware to make the following change:

A1-OUT2 - AC present : Goes LOW when EVSE is connected and verified it allows charging.

Enable then needs to be applied to continue the charging process.

The problem is, I can't compile, I keep getting an error message on Windows.

I sent you a direct message to help.

Yes, so I've now flashed the custom firmware, but as soon as I connect the charging cable, the A1 pin isn't pulled to ground. I need it to switch a relay to supply the Orion BMS2 (charge power pin), and also to activate the VCU on pin 50 GP12vin so that the pumps run. The wiki states that this pin has no function, is that correct?

Okay so the charger is connected to the Charge port Control Pilot and proximity, as we can see the EVSE and cable limits.

I need to review some more of the code and maybe make more changes. Made another version for you to try, as I said I have no way of testing my changes myself.

Perfect, it works! Tomorrow I'll wire everything up and report back on how it all works together.
Thank you so much, you made my day!