I’m trying @alexdelprete sensors package but I get few errors:
The BT Status and BT RSSI sensors report Unknown/Sconosciuto very often as the following screenshot

And the following errors appear in the HA log:
Logger: homeassistant.components.template.template_entity
Source: components/template/template_entity.py:72
Integration: Template (documentation, issues)
First occurred: 18 maggio 2021, 15:09:44 (4 occurrences)
Last logged: 5:21:37
TemplateError('UndefinedError: 'mappingproxy object' has no attribute 'timestamp'') while processing template 'Template("{{ (as_timestamp(states.sensor.nuki_lock_status.attributes.timestamp)) | timestamp_custom("%H:%M (%b %d)") }}")' for attribute '_state' in entity 'sensor.nuki_last_activity'
Logger: homeassistant.helpers.template
Source: helpers/template.py:1378
First occurred: 18 maggio 2021, 15:09:44 (16 occurrences)
Last logged: 5:22:37
Template variable error: 'mappingproxy object' has no attribute 'timestamp' when rendering '{{ (as_timestamp(states.sensor.nuki_lock_status.attributes.timestamp)) | timestamp_custom("%H:%M (%b %d)") }}'
Logger: homeassistant.components.rest.data
Source: components/rest/data.py:69
Integration: RESTful (documentation, issues)
First occurred: 18 maggio 2021, 15:09:44 (491 occurrences)
Last logged: 7:59:35
Error fetching data: http://192.168.0.84:8080/list?token=xxxxxxxxxx failed with
Error fetching data: http://192.168.0.84:8080/info?token=xxxxxxxxxx failed with Server disconnected without sending a response.
Error fetching data: http://192.168.0.84:8080/list?token=xxxxxxxxxx failed with Server disconnected without sending a response.
Logger: homeassistant.components.rest.sensor
Source: components/rest/sensor.py:181
Integration: RESTful (documentation, issues)
First occurred: 18 maggio 2021, 15:09:44 (491 occurrences)
Last logged: 7:59:35
Empty reply found when expecting JSON data
BTW I tied to fetch data manually (multiple times) from http://192.168.0.84:8080/list?token=xxxxxxxxxx or http://192.168.0.84:8080/info?token=xxxxxxxxxx and everytime the bridge reports data flawlessly.
If I restart HA, BT values appear again.