Hello,
I know I'm very late to the party, but here goes my question.
I see that in the growatt documentation tehre is BMS info from input register 90 to 117. Using the code supplied here + a bit of modifications, I am trying to get BMS data. It always comes back as 0. Am I missing a slave...
Did you ever find a solution to this? I got it to fire at one point then nothing. I ran it twice, one after another, first got results, second got error. I rebooted, plugged in different USB...nothing.
I moved the adapter to a windows laptop with Seplos Monitor installed and worked first try...