Compatible RS485 Adaptors - wills106/homeassistant-solax-modbus GitHub Wiki
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RS485 - USB
Generic RS485 - USB
Amazon UK Link1, Berrybase Link1
RS485 - Ethernet
Whatever adapter you buy, make sure it supports modbus transmission. Transparent adapters that do not look into the modbus protocol cannot send the packages to the correct modbus slave.
USR-N510 RS232/RS485/RS422 to Ethernet
Older version of the USR-N510 with DB9 connector supporting RS232/RS485/RS422
USR-W610 RS232/RS485 to Wifi & Ethernet
Only ethernet mode tested so far.
Waveshare RS485 to RJ45 Ethernet DIN Rail Mount - RS485 TO ETH (B) / RS485 TO POE ETH (B)
More information on this adapter can be found under Installation Notes
Amazon UK Link1 , Amazon UK Link2 , Amazon UK Link3
ZLAN5843A 8-port RS232/485 serial port to Ethernet
Untested but should work according to the specs...
USR-N510 RS485 to Ethernet
Newer version of the USR-N510 without DB9 connector supporting RS485 (Specs mention RS232/RS485/RS422 Optional)
Should perform the same as the older version, although untested!
USR-TCP232-410S RS232 / RS485 Serial to Ethernet Adapter
Might work but potentially more hassle...
USR-TCP232-304 only supports a Virtual Com Port?
As this Model appears to only gives you a Virtual Com Port it might prove difficult to pass into Home Assistant running in a VM or Home Assistant OS?
Non Working / Troublesome RS485 Adaptors
Waveshare RS485 to WIFI/ETH
This RS485 adaptor is very problematic:
- There seems to be delayed communications,
- Struggles to read more than 7 registers at a time,
- Modbus Error: [Input/Output] Unable to decode request,
- No ability to set "Auto query storage type" for Sofar Inverters.
Waveshare RS485 to ETH
Not to be confused with the DIN Rail mounted Waveshare RS485 TO ETH (B) mentioned above.
- This adaptor does not support "Modbus Transmission" it is a passive device.
- You can't submit requests to the Inverter.
- It does not work!