Jbd Bms Rs485 address - Guru needed - Solar Assistant

[NutSolar]

I've had two JBD BMS working with SA for a while now using two USB RS485 adapters to deal with each BMS sharing the same address. My inverter can also use RS-485 to communicate with the batteries which would be nice to implement but due to the shared address situation I don't think it would work.

I had an idea this morning though that is admittedly beyond my current capabilities. Would it be possible to use an ESP board to man-in-the-middle one or more RS-485 connections to rewrite the originating address and drop it onto another interface that would then translate incoming packets to the correct BMS interface? With enough connections, it could just sit in the middle of the RS-485 network acting as a switch.

I've been looking on GitHub for something similar this morning but haven't found it yet. Seems like this should already be a thing if it's feasible.

After more reading, I don't think this is feasible with an ESP board.