Dear Bexander
Thank you very much for explanation. I found this part odd/even in * Balancing of cells * part.
Time depends on balanceCellCounterTurnAround.
Thank you again.
Marek

Dear Bexander
I have some problems with balancing (with your original code).
After Balancing ON cell current coming from cell to BMS (+70mA / 20second / good condition) but after this current coming from BMS to cell (-70mA 20second). These both directions are in the loop.
Could you please check if ...

Dear bexander
The current was causing the problem i think. My test charger make only 0,5A /350V.
Now i split one baterry to 6small in parallel connection. I using charger with 60V and 10A and balansig working 10 min without error.
Die temperatures are also higher.
Thank you very much for your help ...

Dear bexander
changes in your code:
const uint8_t lowCurrentPIN = 17;
const uint8_t highCurrentPIN = 18;
in loop disabled //readCAN(); because i don't have can

Please see my log. If i change startShuntVoltage from 4050 to 3600 / for Start cell balance I received:
3 2 2 0 2 0 0 0 2 0 2 0 2 0 2 0 2 ...

Dear bexander.
Cells voltage and temperatures are already working. Now I using 12pcs slaves.
Now I have a little problem with cells ballancing. I edited the code with small error I think.

I have also Battery management unit.
Worse way is find Can on management unit and decode cells voltage but first i want to use code from bexander.
Marek

Dear EV_Builder
I think BMS is same V2.9

This is my Arduino uno log file.

Dear bexander

I tested BMS2_7_3.ino only with 6pcs slaves. I haven´t no reply from slaves. Could you please write me if I need all 12pcs for test or not.
I don´t know if old slaves are damaged or MAX17841B is wrong.

Dear bexander

Thank you for the reply.
I have 12pc of slave modules as you. I want to read voltage with BMS2_7_3.ino (your latest BMS SW)
Thank you once again.
Marek