Hi,
If you bought your S6 from the same seller I really hope you didn’t require the dual MPPT version!
Ah No… I have an Arduino acting as Modbus master reading both the Solis (on Address 01) and the OB115 on address 02. The Solis has no method to access values from the OB115. The Arduino board receives the Modbus, then transmits values via 433mHz in Nextion display format. Data can go straight into a remote Nextion display and also to ‘smart’ sockets which intelligently switch connected loads on /off or proportionally ‘burn’ whatever excess (export) power is available. The socket in photo adjusts power delivered to a small oven such that on a cloudy day etc we can avoid any grid import.
I have some projects on Arduino Project hub (for PV Hotwater) but not this Modbus / Smart socket yet, maybe that will be a winter project if there is any interest.
I’ve attached a zip of the code for the master end (the PCB shown in the earlier post above connected to a 20x4 LCD).
Modbus_OB115_SolisMiniG4_RS485-In_Nextion-Out_V2.zip (6.5 KB)
