RUT956 - Detection of the absence of a component on the local network

Networking Solutions
1

Hi,

What would be the best way to detect the absence of the component on the local network?

Is it possible to use the “PING” function and monitor its absence/presence? To send an alarm in the event of an absence (Like “MQTT” message or “Modbus - RUT” register)?

Thank you in advance for your support.

Best regards.

Cidrick

3

Dear C. Cailleux,

Thank you for your message.

You can use the Topology feature to scan your LAN and identify any missing or connected devices. To do this, please follow the steps below:

  1. Navigate to System → Package Manager.
  2. In the search bar, type Topology and download the package.
  3. Once installed, go to Status → Network → Topology.
  4. Click Scan LAN to start the scan.

After the scan is complete, you will see a list of all devices currently connected to your LAN.

If the device once was connected to the same LAN and now is missing, it will show the device’s IP address as offline.

For more detailed instructions on how the Topology feature works, please refer to our documentation here:

I hope this helps! Please don’t hesitate to reach out if you have any further questions.

Kind regards,
V.

4

Good afternoon Vilius,

Perhaps my question is poorly worded.
I would like to know the “PING” status via an “MQTT” variable.

Thank you in advance for your support.

Best regards.

Cidrick

5

Greetings,

Thank you for your question,

The standard MQTT monitoring support in RUT956 does not include a built-in “ping state” or “host reachable/unreachable” metric published automatically to MQTT. Monitoring via MQTT mechanism exposes only a limited set of system parameters (like uptime, network mode, signal, operator), and does not include ping results. This can be achieved with a custom script, however, custom script writing is out of technical support scope.

I hope this helps,

Warm regards,
V.

6

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