If these modules use Max1785x slaves and you are struggling for support let me know. I have an STM32 and ESP32 solution.

Here's what the preamble should look like on both MAX17841 TX -> MAX17845 RX (up) and MAX17845 TX -> MAX17841 RX (down) pairs.

Hi,
Im currently working on my project with A Peugeot E-208 battery pack. The modules use MAX17854 chips and I use the PCB design from Manny with Arduino pro mini, MAX17841B along with BMS2_7_4.ino code, but I running into a problem where the serial monitor says:
errorByte cleared writeAll ...

YankeeB wrote: ↑Thu Oct 30, 2025 2:03 pm Hi, does this work with the KIA EV6 BMS?

For the Maxim ISO BUS connection, yes. These are the 2x twisted pair which forms a daily chain between the modules.

AmeldePamel wrote: ↑Fri May 09, 2025 11:23 am Hello, can this board also communicate with the BMS of a Kia Niro?

Yes. I have a few complete Maxim ISO-SPI dual CAN boards now rather than just the SPI interface. They use an ESP32-C6 and Arduino.

77evzen77 wrote: ↑Tue Mar 04, 2025 4:13 pm Hi, I would like to ask where it would be possible to get the module that is in the 6QupRET.jpeg with MAX17841??? many Thank Evzen

I have one left. It’s not too difficult to reuse the hardware from the vehicle if you have the main control module.

If anyone is having no comms issues with these modules there may be a fundamentally different slave IC in their packs.

Tried all the code shared here only to find the modules I have are MAX17854 as confirmed from reading register 0x0.

Currently working my way through new code based on the ...

If its supposed to be CCS EV to ChaDeMo EVSE it would be more complicated.


Yes, this is the plan. I suppose it would be easier to start with an open ended implementation of CCS and then patch in the mocked CHAdeMO vehicle as middleware.


Are you aware that the Ph.2 has (different to Ph.1) a ...

I’m not 100% sure but from a quick search that Mercedes uses CATL packs. The only interface I know that works with this tech is the MAX178xx controller.

This thread should put you in the right direction. https://openinverter.org/forum/viewtopic.php?t=2181&start=25

I do have some spare SPI ...

Hi,

Thought I'd share my £12 off the shelf setup, no soldering required!

I wrote a Solax battery emulator almost 2 years ago now and have been using that code to use unmodified Renault EV batteries on Solax and FoxESS kit. Over the years this was adapted for 65V Victron kit (BYD emulation) and so ...

Modbus control is done on pins 3 & 4 (Modbus Meter is 1 & 2)

There's a discussion here for driving the inverter manually. https://github.com/nathanmarlor/foxess_ ... ssions/513

There’s no need to simulate a power meter, you can drive a FoxESS manually by commanding power.

I’ll edit this comment with a link to their internal communications specification document.

Here: https://drive.google.com/file/d/1eZSxXRflruOIlPNNiN7fuOvuC0YZZzjg/view

Look up Active Power ...

Hey there, I may able to help you out with your Zoe PH1 CAN data. Let me setup a repo and I will add some DBC files and an extensive collection of logs (which I think were found in here).

Edit: Logs can be found in this forum here https://openinverter.org/forum/viewtopic.php?p=40132#p40132 and I ...

For the V2X application, I already need to accurately report battery current to the ChaDeMo CAN interface. By offsetting this and reporting to the inverter via RS485, I can control the charge / discharge current.


I have a copy of the official CHAdeMO spec and built my own library based on it ...

I am probably wrong on that.

Found this from last year.

> The project is designed to play both roles, EVSE and car. To work on the project, I just open two console windows on the same machine, start in the first window the EVSE with "python pyPlc.py E" and in the second the PEV with "python pyPlc ...

I see you have confused pyPLC.py P as a pseudo vehicle. Not just me then…

There’s no vehicle simulator here from what I can tell. P is for translating CHAdeMO can to CCS from what I can gather.

Just received my used indra v2g device that I suppose not able to use in v2g because outside UK. Do you have any detailed teck info about the PRE v2g500 inverter model? I can find only this short document: https://www.chademo.com/wp2016/wp-content/uploads/2018/05/V2G%206kW%20-%2010kW%20datasheet ...

paaa wrote: ↑Wed Jun 28, 2023 11:45 am Can you share these can logs ?

https://github.com/rand12345/Ardni-V2H

I can see the voltage in can data and on the meter, the contactors close initially because target voltage is reached. Going to change the capacitor and see what happens.

I can see the states change using SavvyCan and the M3 dbc https://streamable.com/sia5kn , the voltage comes up and when equalised the contactors close. My fault condition is like your fault but I have no load. I needed to power cycle the BMS to restart the precharge state.

I have used the same ...

Thanks for responding OOP. My issue is happening with no load (nothing connected) on the HVDC lines, did your contactors stay closed when you did not have the inverter connected?

I have a complete dump of the BeagleBone file system, and both can1 and can2 logs if anyone is interested.

Tempted to DIY my own V2G as a V2H this summer.

I have an odd contactor issue with one out of two M3 packs.

Pack 1 is dated 2020, pack 2 is 2021. I have no issues with pack 1, contactors closing and all is well. Using exactly the same routine as bielec's ESP32 code, pack 2 will only close the contactors for approximately 60 seconds before ...

I think the other 0x1871 frames are for can slaves, I noticed differences on the BMS version screen when responding to them. Can’t be sure though.

I think that cell voltage data goes in there too but I don't have a V2 FoxESS BMS master to get a can log from. You can see cell voltages on their cloud platform, numbered 1-141 IIRC.