Manually trigger nmap home scan

Configuration
1

Hello there,
Is there a way to trigger a manual nmap scan, only for devices that are home if possible?
I could lower home_interval, but I don’t want to send out too many requests. Anyway, I would trigger this scan when my bluetooth tracker changes to not_home. This way I can use both trackers (WiFi and Bluetooth) in a person and HASS can be almost instantly be aware of me leaving my place.

I know an “alternative” could be to directly run nmap command, parse the output and then execute device_tracker.see, but I’d like to know if there is an easier (and more clean) approach to this.

Thank you!

2

Hi, this may be too late for you, but you can do this with Shell Command - Home Assistant. The nmap page tells you what commands are sent by default, and I copied that to set up a run_nmap command (excluding the HA server at 192.168.1.144) which then appears as the callable service shell_command.run_nmap

shell_command:
  nmap -oX - 192.168.1.1/24 --exclude 192.168.2.144 -F --host-timeout 5s

Then, call it from s script like this:

run_nmap_scan:
  alias: Run nmap scan
  sequence:
  - service: shell_command.run_nmap
  mode: single
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3

Thanks, but that will not update the device trackers.

4

You’re right, it doesn’t. I’m still pretty new at this, and am now confused. If nmap doesn’t update any trackers, why is it so often mentioned as (part of) a presence detection setup? I wonder what other use cases there are for it.

5

That’s because the HA component for network device tracking calls nmap directly and parses its output:

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6

For those still finding this topic after all this time and are interested in the “alternative” solution that @daniele_athome mentioned, check mine here. There are some steps involved but it works beautifully.

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