Devices deleted in SmartThings aren't removed from Home Assistant

The problem

Devices deleted in SmartThings are not removed from Home Assistant automatically and can’t be deleted manually in Home Assistant.

Environment

• Home Assistant Core release with the issue: 2020.12.2
• Last working Home Assistant Core release (if known): Unknown
• Operating environment (OS/Container/Supervised/Core): OS (RPi 4)
• Integration causing this issue: SmartThings
• Link to integration documentation on our website: https://www.home-assistant.io/integrations/smartthings/

Problem-relevant configuration.yaml

GUI used for SmartThings integration configuration.

Traceback/Error logs

I enabled debug logging for the SmartThings integration per the documentation above but didn’t identify any relevant logs related to the issue. I don’t see any log entries related to the devices removed in SmartThings.

Additional information

I also attempted to delete and re-add the entire SmartThings integration but this caused entities to be revert to their default entity ID (requiring automations to be reconfigured) and entities/devices needed to be re-added to areas.

[ovidiupruteanu]

It looks like this is still an issue in 2021.10.2

[briodan]

I completed my migration from ST to HA so this does not really impact me anymore but figured I would share the process I used in case it helps others. Since I doubt this is getting fixed anytime soon.

1. made sure none of the ST devices or entities were renamed in HA or if they were revert them to original name. I had about 40 devices so it took a bit of work. Had influxdb running in ST which helped with getting the original names from ST.
2. Made sure to have a saved copy of the ST token
3. For each device I wanted to move I would do the following
4. Check for all automations using the device/entity in HA, I would just open the automation in a new tab.
5. Remove the device from ST
6. Rename the device/entities in HA to start with “old_”. This allows reuse of the name without having to add _2 or something to it
7. Added device to HA, note sometimes the entities get new names in HA ie temperature_measurement would become temperature.
8. Updated automations with the new device/entity name
9. Test automations
10. Deleted and re-add the ST integration every 2-3 devices migrated this would get rid of the “old_” devices, however it would keep all existing automation etc working after the add since the names are the same.

I was fortunate to not have a lot of devices that I renamed in HA, so it was not much of a problem, if someone renamed extensively I would save step 10 for when all devices have been migrated.