it still gives lots of things in the errorlog:
sensor 3:
platform: template
sensors:
licht_raamkozijn:
friendly_name: Lichtst. raamkozijn (legohuis)
value_template: '{{ states.sensor.arduino2_3_101.state }}'
unit_of_measurement: ' '
entity_id:
- sensor.arduino2_3_101
16-08-13 13:22:10 homeassistant.core: WorkerPool:All 5 threads are busy and 16 jobs pending
16-08-13 13:22:10 homeassistant.core: WorkerPool:Current job from 2016-08-13T13:22:08.337291+02:00: (<function load_platform.<locals>.discover_platform at 0x0407A930>,)
16-08-13 13:22:10 homeassistant.core: WorkerPool:Current job from 2016-08-13T13:22:08.337291+02:00: (<function load_platform.<locals>.discover_platform at 0x0407A978>,)
16-08-13 13:22:10 homeassistant.core: WorkerPool:Current job from 2016-08-13T13:22:08.337291+02:00: (<function load_platform.<locals>.discover_platform at 0x0407A8E8>,)
16-08-13 13:22:10 homeassistant.core: WorkerPool:Current job from 2016-08-13T13:22:08.337291+02:00: (<function load_platform.<locals>.discover_platform at 0x0407A9C0>,)
16-08-13 13:22:10 homeassistant.core: WorkerPool:Current job from 2016-08-13T13:22:10.766217+02:00: (<function SensorTemplate.__init__.<locals>.template_sensor_state_listener at 0x052E64B0>, <Event state_changed[L]: old_state=None, new_state=<state sensor.licht_raamkozijn=; friendly_name=Lichtst. raamkozijn (legohuis), icon=mdi:lightbulb, unit_of_measurement= @ 2016-08-13T13:22:10.766217+02:00>, entity_id=sensor.licht_raamkozijn>)
16-08-13 13:22:10 homeassistant.core: WorkerPool:All 5 threads are busy and 31 jobs pending
16-08-13 13:22:10 homeassistant.core: WorkerPool:Current job from 2016-08-13T13:22:08.337291+02:00: (<function load_platform.<locals>.discover_platform at 0x0407A930>,)
16-08-13 13:22:10 homeassistant.core: WorkerPool:Current job from 2016-08-13T13:22:08.337291+02:00: (<function load_platform.<locals>.discover_platform at 0x0407A978>,)
16-08-13 13:22:10 homeassistant.core: WorkerPool:Current job from 2016-08-13T13:22:08.337291+02:00: (<function load_platform.<locals>.discover_platform at 0x0407A8E8>,)
16-08-13 13:22:10 homeassistant.core: WorkerPool:Current job from 2016-08-13T13:22:08.337291+02:00: (<function load_platform.<locals>.discover_platform at 0x0407A9C0>,)
16-08-13 13:22:10 homeassistant.core: WorkerPool:Current job from 2016-08-13T13:22:10.797468+02:00: (<function SensorTemplate.__init__.<locals>.template_sensor_state_listener at 0x052E68E8>, <Event state_changed[L]: old_state=None, new_state=<state sensor.licht_raamkozijn=; friendly_name=Lichtst. raamkozijn (legohuis), icon=mdi:lightbulb, unit_of_measurement= @ 2016-08-13T13:22:10.766217+02:00>, entity_id=sensor.licht_raamkozijn>)
16-08-13 13:22:10 homeassistant.core: WorkerPool:All 5 threads are busy and 61 jobs pending
16-08-13 13:22:10 homeassistant.core: WorkerPool:Current job from 2016-08-13T13:22:08.337291+02:00: (<function load_platform.<locals>.discover_platform at 0x0407A930>,)
16-08-13 13:22:10 homeassistant.core: WorkerPool:Current job from 2016-08-13T13:22:08.337291+02:00: (<function load_platform.<locals>.discover_platform at 0x0407A978>,)
16-08-13 13:22:10 homeassistant.core: WorkerPool:Current job from 2016-08-13T13:22:08.337291+02:00: (<function load_platform.<locals>.discover_platform at 0x0407A8E8>,)
16-08-13 13:22:10 homeassistant.core: WorkerPool:Current job from 2016-08-13T13:22:08.337291+02:00: (<function load_platform.<locals>.discover_platform at 0x0407A9C0>,)
16-08-13 13:22:10 homeassistant.core: WorkerPool:Current job from 2016-08-13T13:22:10.797468+02:00: (<function SensorTemplate.__init__.<locals>.template_sensor_state_listener at 0x052E68E8>, <Event state_changed[L]: old_state=None, new_state=<state sensor.licht_raamkozijn=; friendly_name=Lichtst. raamkozijn (legohuis), icon=mdi:lightbulb, unit_of_measurement= @ 2016-08-13T13:22:10.766217+02:00>, entity_id=sensor.licht_raamkozijn>)
after changing everything, most of it is gone, but now i get the old part back:
16-08-13 13:44:51 homeassistant.components.sensor.template: UndefinedError: 'None' has no attribute 'attributes'
16-08-13 13:44:51 homeassistant.components.sensor.template: UndefinedError: 'None' has no attribute 'attributes'
16-08-13 13:44:51 homeassistant.components.sensor.template: UndefinedError: 'None' has no attribute 'attributes'
16-08-13 13:44:51 homeassistant.components.sensor.template: UndefinedError: 'None' has no attribute 'attributes'
16-08-13 13:44:51 homeassistant.components.sensor.template: UndefinedError: 'None' has no attribute 'attributes'
16-08-13 13:45:00 homeassistant.core: WorkerPool:All 23 threads are busy and 70 jobs pending
16-08-13 13:45:00 homeassistant.core: WorkerPool:Current job from 2016-08-13T13:45:00.507226+02:00: (<function setup_scanner_platform.<locals>.device_tracker_scan at 0x0705FED0>, <Event time_changed[L]: now=2016-08-13T13:45:00.504226+02:00>)
16-08-13 13:45:00 homeassistant.core: WorkerPool:Current job from 2016-08-13T13:45:00.508227+02:00: (<function EntityPlatform._update_entity_states at 0x04EB7DF8>, <Event time_changed[L]: now=2016-08-13T13:45:00.504226+02:00>)
16-08-13 13:45:00 homeassistant.core: WorkerPool:Current job from 2016-08-13T13:45:00.543250+02:00: (<function Group._state_changed_listener at 0x07BD11E0>, <Event state_changed[L]: new_state=<state sensor.cpu_use=50; unit_of_measurement=%, friendly_name=CPU Use, icon=mdi:memory @ 2016-08-13T13:45:00.508227+02:00>, old_state=<state sensor.cpu_use=0; unit_of_measurement=%, friendly_name=CPU Use, icon=mdi:memory @ 2016-08-13T13:44:49.341234+02:00>, entity_id=sensor.cpu_use>)