[philippecottier]

Problem

When a wireless device is removed from the gateway or replaced (in my case a faulty A9MEM1570 F63 3P+N swapped for three A9MEM1560 1P+N tags), the old device stays in Home Assistant forever:

• the Delete action is not offered in the UI,
• the API answers Config entry does not support device removal,

because the integration does not implement async_remove_config_entry_device.

The only workaround so far is to delete and re-add the whole integration (see the comment in #50), which loses entity customisations (names, areas, energy dashboard, automations).

Change

• During the (sequential) platform setup scan, the identifiers of the gateway and of every wireless device found are collected in hass.data[DOMAIN][entry_id]["present_devices"].
• async_remove_config_entry_device allows removal only if none of the device's identifiers are in that set:
  • devices still reported by the gateway are refused (they would be re-created on the next reload anyway),
  • if the entry is not loaded, removal is refused (we cannot tell what is on the gateway).
• README: short Removing old devices section.

No change to unique IDs, entities or Modbus traffic.

Notes

• A tag that is paired but currently unreachable is skipped by the scan (existing behaviour), so it can be deleted too; it is simply re-created on the next reload once reachable again.

[Breina]

Very good! You even included a README section! <3

Thanks for the fix!

[Breina]

Released in https://github.com/Breina/PowerTagGateway/releases/tag/v0.6.6