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jamiejones85 / ESP32VWMITM

A ESP32 based can bus-man-in-the-middle for VW GTE battery packs, allows communication with parallel packs by adding and removing an ID offset.
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Schematics #1

Open alcomys opened 1 month ago

alcomys commented 1 month ago

Hello, Jamie

Do you have the schematics of the board? I want to transfer the board to Kicad but without schematics it is hard to do.

Thanks for the help.

jamiejones85 commented 1 month ago

Schematic_ESP32-CanBridge_2024-07-29.pdf

alcomys commented 1 month ago

Hi Jamie,

Much thanks for the schematics.

And i like your project a lot.

Best regards, Alcomys

alcomys commented 1 month ago

Hi Jamie,

I have a question for you.

I have 5 VW gte battery packs and I want to try to communicate with the battery packs.

I want to make a home battery from them with my solar panels.

Can you tell me witch project is the best to use from your repository?

I don’t have a lot of money to buy expensive BMS controllers so I like to reuse the BMS on the battery.

I have some hardware lay around like ESP32 Vroom/ESP8266 modules etc. and I have ordered some MCP2515 and VP230 ic’s

I thought the project ESP32VWMITM-main was usable for me, but I don’t understand the two can-bus ic’s in the schematics.

Maybe you can explain me some of my questions? And or help me to connect my battery’s ?

Thanks for your help

Best regards, Alcomys

Van: Jamie Jones @.> Verzonden: Monday, 29 July 2024 19:30 Aan: jamiejones85/ESP32VWMITM @.> CC: alcomys @.>; Author @.> Onderwerp: Re: [jamiejones85/ESP32VWMITM] Schematics (Issue #1)

Schematic_ESP32-CanBridge_2024-07-29.pdf https://github.com/user-attachments/files/16416833/Schematic_ESP32-CanBridge_2024-07-29.pdf

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jamiejones85 commented 1 month ago

So I have one board that I use as the BMS master, that's https://github.com/jamiejones85/VW-bms/tree/ESP32-PORT-TEST and because the can ID's will clash with multiple packs I use the MITM to add an offset to them for the BMS master so they can be on the same canbus. I only have 3 packs in parallel though.

alcomys commented 1 month ago

Hi Jamie,

I did read you comment and i think i understand it.

So I need two of your projects right? ESP32-PORT-TEST and ESP32VWMITM But the only question is. how do i connect them together?

Thanks for the help.