group – nocin.eu

[Home Assistant] Presence detection

December 30, 2022 April 19, 2024

There are different ways to realize presence detection in Home Assistant:

https://www.home-assistant.io/getting-started/presence-detection/

As I have a FritzBox at home, I’m using the AVM FRITZ!Box Tools Integration, which has “presence detection by looking at connected devices”.

You can find your devices using the developer tools and looking for the device_tracker entity. I then use the devices in a group to easily check if anyone is home.

/config/groups.yaml

family:
  - device_tracker.xiaomiredminote8pro
  - device_tracker.xioamimi8

Update 19.04.2024: Instead of a group, you could also use the zone.home entity and check if its numeric value is 0 (not_home) or above 0 (home) in your automations. The zone.home entity relates to the person and the device that belong to a person, that you can configure under Settings → People → Select a Person → Select the devices that belong to this person.

Home Assistant

[Home Assistant] Control lights with multiple motion sensors

April 3, 2022 April 3, 2022

Create group of motion sensors in groups.yaml
https://www.home-assistant.io/integrations/group/

cellar_motion:
  name: Cellar Presence
  icon: mdi:motion-sensor
  entities:
    - binary_sensor.bewegungsmelder_xxx_ias_zone
    - binary_sensor.bewegungsmelder_xxx_ias_zone

Next, if you have more than one light you’d like to control, create a group of lights in your configuration.yaml
https://www.home-assistant.io/integrations/light.group/

# Light Groups      
light:
  - platform: group
    name: Cellar Lights
    entities:
      - light.ikea_of_sweden_tradfri_bulb_e27_ww_806lm_xxx_level_on_off
      - light.ikea_of_sweden_tradfri_bulb_e27_ww_806lm_xxx_level_on_off

And finally use both in an automation

alias: My motion activated lights
description: Turn on a light when motion is detected.
trigger:
  - platform: state
    entity_id: group.cellar_motion
    from: 'off'
    to: 'on'
condition: []
action:
  - service: light.turn_on
    target:
      entity_id: light.cellar_lights
    data: {}
  - wait_for_trigger:
      platform: state
      entity_id: group.cellar_motion
      from: 'on'
      to: 'off'
  - delay: 120
  - service: light.turn_off
    target:
      entity_id: light.cellar_lights
    data: {}
mode: restart
max_exceeded: silent # https://www.home-assistant.io/docs/automation/modes/

Terminal

[Shell] User and Group management & File permissions

March 5, 2020 March 5, 2020

User and Group management
- id
- useradd
  - -c – Full name
  - -e – Expiration date
  - -s – Default shell
  - -d – Home directory
- passwd
- usermod
  - -l – rename
  - -L – Lock
  - -U – unlock
- userdel
  - -r – remove user data
- groupadd
- groupmod
- gpasswd [-a -d -A] [user1, user2] [group]
- newgrp [group]
su vs. su – vs. sudo
- visudo
File permissions
- UGO – User, Group, Other
- RWX – Read, Write, Execute
- chmod -R g+x (grant recursive execute permission to group)
  - r = 4
  - w = 2
  - x = 1
  - – = 0
  - rwxrwxrwx = 777
  - rw-rw-rw- = 666
  - rwxrwxr–- = 774
  - rw-rw—- = 660
  - rw-r—–- = 640
- chown
- chgrp
- umask

https://www.sluug.org/resources/presentations/2020/2020-02-12_permissions.pdf