State to file

Configuration
1

Hi all, please help with shell_command. I want to write value of same sensor to file, but can’t get working it.

shell_command:
   write_daily_rain: echo {{ states("sensor.daily_rain") }} > /run/weather/daily_rain

automation:
 - alias: sensor_daily_rain_to_file
   trigger:
    - platform: state
      entity_id: sensor.daily_rain
    - platform: homeassistant
      event: start
   action:
    - service: shell_command.write_daily_rain

logger:
   default: warn
   logs:
      homeassistant.components.shell_command: debug

Log:

2022-11-02 16:47:47.600 DEBUG (MainThread) [homeassistant.components.shell_command] Stdout of command: `echo {{ states("sensor.daily_rain") }} > /run/weather/daily_rain`, return code: 0:
b'0.03 > /run/weather/daily_rain\n'

Automation runs, but file is not written. Something weird in log. Why?

2

Same Problem here. I cant get it to run. Dont understand why.
in Terminal mode i get no state of Entity. Maybe there is the problem? Do we have access to the entitys?

It works with the “notify” function. But then every time it triggers the event, a new line is coming up. This isnt what i neede. i only want to have the value in one single line.

But HOW :smiley:

3

Finally this works:

shell_command:
   write_daily_rain: /bin/bash -c "echo {{ states.sensor.daily_rain.state }} > /run/weather/daily_rain"

automation:
 - alias: sensor_daily_rain_to_file
   trigger:
    - platform: state
      entity_id: sensor.daily_rain
    - platform: homeassistant
      event: start
   action:
    - service: shell_command.write_daily_rain
4

I wanted to write a multiline JSON blob to a file, and I ended up with:

configuration.yml:

shell_command:
  write_my_settings: ./write-my-settings.sh '{{ my_settings }}'

/config/write-my-settings.sh (marked as executable):

#!/bin/bash

cat > ./my-settings.yaml <<EOF
# serialized settings automatically written daily
# this file contains a header can be read, for instance with:
#
#     sed '/^#/d' my-settings.yaml | jq
$1
EOF

The automation:

alias: Store My Settings
description: ""
trigger:
  - platform: time
    at: "00:00:00"
condition: []
action:
  - service: script.get_my_settings
    data: {}
    response_variable: my_settings
  - service: shell_command.write_my_settings
    data:
      my_settings: |
        {{ my_settings|to_json(pretty_print=true) }}
    response_variable: command_response
  - if:
      - condition: template
        value_template: "{{ command_response['returncode'] != 0 }}"
    then:
      - service: persistent_notification.create
        data:
          title: Failure to write my settings
          message: "{{ command_response['stderr'] }}"
mode: single