Use RS485 instead of LIN transceiver

[Anoxym]

Hi,

I'm a bit confused about the protocols used to control the LG system.

I already have a module called LG-RC-MBS-1 that controls the LG system via RS485.

Could anyone help me or guide me on how to modify the code to use this module instead of the LIN transceiver?
I assume I just need to update the connection part?

Here’s the module manual, which includes a table listing the register addresses for controlling the LG system:

LG-RC-MBS-1 User Manual

I have an ESP32 with an RS485 output that will be connected to the RS485 module via A+ and B- and B Y R to LG unit.

Can someone guide me?

[JanM321]

I don't think that's possible? The ESPHome controller in this repository talks to the indoor unit using LG's B/Y/R connection/protocol. The IntesisBox module does the same thing, but it also offers RS485. This is very different from the LG protocol though - it seems to use Modbus.

[Anoxym]

The intensisBox is wired to indoor unit too, so the best way is to replace my RS485 on esp32 and add a LIN transceiver ? then :
B : GND
Y : DATA
R : +12V
I don't need the +12V, just need to wire B and Y to LIN ?
Actually, I want to use the IntesisBox because it would save me from having to buy the LIN module, as I already have it and it works with the current system. Besides, it is specifically designed to control the LG environment.