Really NO idea what device .166 is, as it’s not present, and Unifi won’t help me either.
And I don’t find anything in my config that refers to .166.
How would you hunt down that error? I mean 70k+ appearances is quite a lot …
The error message refers to pymodbus and to port 502 so it appears to be related to the Modbus integration.
Check under the modbus key in your configuration.yaml file to see how you have it configured.
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Thank you. Much easier if you READ the log properly 
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