a simple cron job (Scheduled Tasks) on an Openwrt access point, everything that the Linux terminal makes available can be transmitted to Home-Assistant. As an example, my OpenWrt devices provide the following information:

• The list of all connected clients.
• CPU and memory utilization.
• The last entry in the kernel log.
• The DHCP leases from the main router.
• Usteer data from the main router for the network overview.

The cron job starts every minute and enables continuous monitoring and management of the network infrastructure via Home Assistant.

Basics for this implementation, see: Display datafrom any Linux systems in HA!]

Prerequisite on the access points: curl

To enable the access points to send data to a webhook in Home Assistant, only the small software package "curl" is required:

Once curl has been installed, any commands can be transmitted to Home Assistant every minute, for example via Scheduled Tasks:

Scheduled Tasks

I use the following commands in the Scheduled Tasks on the access points to collect the data. The commands can be adapted as required or extended with additional commands. It makes sense to test the commands in a terminal beforehand.

* * * * * log=$(dmesg 
	
<p>I have created the following sensors for reception:</p>
<p>For the main router:</p>
<ul>
<li>input_text.openwrt_log (last log line of the kernel log, standard helper sensor)</li>
<li>sensor.openwrt_load (CPU utilization, Variables+History Sensor)</li>
<li>sensor.openwrt_ram (RAM utilization, Variables+History Sensor)</li>
<li>sensor.openwrt_crondata (DHCP and Usteer data, Variables+History Sensor)</li>
</ul>
<p>and for the access points:</p>
<ul>
<li>input_text.APNAME_log (Standard Helper Sensor)</li>
<li>sensor.APNAME_load (Variables+History Sensor)</li>
<li>sensor.APNAME_ram (Variables+History Sensor)</li>
</ul>
<p>The automation for filling the sensors looks as follows:</p>
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<pre class="language-yaml"><code>alias: WebHook-OpenWrt
description: ""
triggers:
  - trigger: webhook
    allowed_methods:
      - POST
      - PUT
    local_only: true
    webhook_id: "???-OpenWrt"
conditions: []
actions:
  - action: input_text.set_value
    metadata: {}
    data:
      value: "{{ trigger.data.log }}"
    target:
      entity_id:
        - input_text.openwrt_log
  - action: variable.update_sensor
    metadata: {}
    data:
      replace_attributes: true
      attributes:
        dhcp: "{{ trigger.data.dhcp }}"
        usteer: "{{ trigger.data.usteer }}"
        stations: "{{ trigger.data.stations }}"
      value: >-
        {% set Stations = trigger.data.stations.split('Station ') %} {% for
        Station in Stations if (Station.split("\n")[0].split(" (")[0] != "")%}
        {% set StationDetail = Station.split("\n") %}{% set mac =
        StationDetail[0].split(" (")[0] %}{{ mac.replace(":","") }}{% endfor %}
    target:
      entity_id: sensor.openwrt_crondata
  - action: variable.update_sensor
    metadata: {}
    data:
      replace_attributes: false
      value: "{{ trigger.data.uptime.split(\": \")[1].split(\",\")[0]  }}"
    target:
      entity_id: sensor.openwrt_load
  - action: variable.update_sensor
    metadata: {}
    data:
      replace_attributes: false
      value: "{{100 - trigger.data.free | float}}"
    target:
      entity_id: sensor.openwrt_ram
mode: parallel
max: 10