Found this post and the very useful informations about the PWM Signal.
I like to use a ESP32 based HW. This one delivers 3.3V output. Has anyone tried this for PWM control of the Nissan / Tesla pumps?


Just gave it a short try and it failed. Logik Level Converter from 3.3 to 5V is the way to ...

Actually I'm up to version 3 of my setup with an 24Ah LFP and a separate charge regulator. Diode and Relay contact changed a lot...
The 12V LFP battery is charged whenever the main DC-DC provides energy and it does only supply the car when it does not.
Actually this solution needs more components ...

Found this post and the very useful informations about the PWM Signal.
I like to use a ESP32 based HW. This one delivers 3.3V output. Has anyone tried this for PWM control of the Nissan / Tesla pumps?

Thanks in advance
Frank

tom91 wrote: ↑Tue Feb 25, 2025 11:34 am Yes if you use the warning ones and not the alarm ones.

That was my approach. Maybe I should add LowTemperature for the Limit specification. But first: TEST.

Thank's a lot for your fast response, the complete definition for 0x35A and the corresponding code snippet.

Have a nice day!
Frank

I'm interpreting CANbus data from my SimpBMS. The manual says that 0x35A Warning should send these Datas:
image.png
But in the TESLABMSV2.ino project I found a more complex definition, that maybe is related to a Victron system I didn't use:
msg.id = 0x35A;
msg.len = 8;
msg.buf[0] = alarm[0 ...

I do have a similar challenge with the weight as DVD3000 and had nearly the same idea as muehlpower to use a battery from the supplier in his link. But I do like the smaller 24Ah batterie much more. https://www.autobatterienbilliger.de/Accurat-Traction-T24-LFP-12V-LiFePO4-Lithium-Versorgungsbatterie ...

You need to change code so up to you how you do it.

You are right, if I want to do that, it is my responsibility.
Based on the code, the VEcan() function was added primary for the Victron Energy support and maybe that's why so many ID's are in use.
A Charger is enable via CAN broadcast message ...

tom91 wrote: ↑Sun Oct 27, 2024 3:58 pm Not possible. You need to modify the code to add this message structure.

OK. Is it easier to add a new ID with this structure or modify one of the existing?
I do have an Elcon charger and DC/DC converter on the same Canbus. So I shouldn't interfere those communications.

Best regards
Frank

At the moment I'm configuring my Hyper9 system with the SME AC-X1 controller in combination with SimpBMS. They should exchange data via CAN network, but the configuration page of the TAU smartview software causes me problems.
I'm running TESLABMSV2.ino and this is the CAN output: https://up.picr.de ...

Do you still plan to finish this? I've got a SimpCharge in combination with SimpBMS. The lock mechanism is a TUEV requirement and I've already started with a DRV8871 to operate it. LED's would be an additional feature.
Let me know if the unit is available, please.

Best regards
Frank

i just received my SimpBMS board from Second Life EV Batteries Ltd and start to play around with it. Amazing thread with lots of information!
Just wondering: Did someone create a housing for this board and provides a step or stl file to print it?