ESP8266/RS485 on Growatt inverter - spurious data between updates

ESPHome
21

Hi

The DB9 can’t be used for this purpose
Next to the connection there is a small opening that has several connectors among which a RS485

22

Hello,
maybe someone can help, where to connect RS485_to_ETH RS485 A/B ports to inverter Growatt MOD inverter

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Thank you.

23

pins 3,4 to A.B