Using Folder Sensor with /backup

Configuration
11

Due to the limitations of the folder sensor (not able to access /backup as HA container when running HA OS), I went the MQTT path instead of using a file as temporary information cache. Works the same. Following InfluxDB information (database size) as sensor in Home Assistant - #17 by e-raser where InfluxDB folder size is gathered - same process.

The clue is to get the information at all, for this I used the community SSH & Web Terminal with protection mode off and using this within the init_commands in the addons configuration section:

while [ 1 = 1 ]; do du -shm /backup | cut -f1 | mosquitto_pub -t homeassistant/sensor/system/foldersize/backup -r -u '<mqtt_username>' -P '<mqtt_password>' -l -i 'SSH-addon_init-command_1' && sleep 900; done &

So every 15 minutes (sleep 900) the size is calculated and sent to the MQTT broker.

Then the following MQTT sensor creates the sensor entity:

mqtt:
  sensor:
    - name: Home-Assistant Size Folder /backup
      unique_id: abc-abc-abc-abc
      #entity_id: sensor.home_assistant_size_folder_backup
      unit_of_measurement: MB
      icon: mdi:folder
      state_topic: "homeassistant/sensor/system/foldersize/backup"
      state_class: total
      entity_category: diagnostic
      value_template: "{{ value }}"

Giving
grafik

grafik

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