Integration Diagnostics
Integration diagnostics give you a snapshot of internal data without having to use debug logs. This snapshot will download a JSON file with internal data from the integration. You must upload this diagnostic file with all issue reports.
Click on the integration menu from "Devices & Services" in Home Assistant, and choose "Download diagnostics" from the hub menu.
You can also enable/disable debug logging from this menu while the integration is running.
To get startup debug logs: turn on debug logging, reload the integration, then turn off. When debug logging is turned off it will download a log file.
If your issue requires pymodbus debug logs you will have to edit configuration.yaml and reload Home Assistant. This is rarely needed and increases the log size.
logger:
default: warning
logs:
pymodbus: debug