Diybms - poor cell modules communication SOLVED

I’ve had a lot of trouble with constant dropouts of cell module communication, I believe it’s my noisy inverter messing things up badly.

I notice communication is fine if inverter not running.

So I went back to basics and simply grabbed both the rx and tx lines, and controller starts picking up the modules right away!
Thinking I must be grounding the noise signals, I’ve next tried putting some aluminium tape over the rx and tx lines and connecting that to battery negative. Seems to be working well :blush:

(Basically I’ve just made diy screened cable! :joy:)

Hope this helps people with cell coms issues?