How to get the shell command result?

Configuration
1

I need to get the IP of the devices connected to my lan, so I installed nmap, and I get the list with sudo nmap -sn 192.168.0.0/24 command. But I want to send the comand from home assistan, and get the resul. I know how to call it from an HA script, but no idea how to show the result…
Does anybody know it? Thanks

2

That will return the entire command output by default, which is likely in excess of the 255-character limit for a state. You could do something like:

    value_template: '{{ value.replace("\n","")|regex_findall("\.(\d+)Host is up")|join(",") }}'

which would give you a comma-separated list of final octets for hosts that are up, which should fit in 255 characters for fewer than 60 live hosts.

What are you trying to do with it?

1 Like
3

Just get a list of the devices connected to my lan… because my router is faulty, reset from time to time and change some of my devices IP… fixed IP are ignored…while I am waiting for my ISP solution , basically a new router replacement, I need to know the new IP to remotely…

4

It seems command line don’t work. I think this is because I run HA in a docker, and Nmap was installed from raspian os, outside the container… I run shell commands in this cases by ssh from HA, like
shell_command: IP:Scan: ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -i /folder/id_rsaMYRASPBERRY sudo nmap -sn 192.168.1.0/24
This work for outside container commands, like open or close servers, or in this case, calling Nmap.
But I am nor sure how add the template to get the result of the command, where must I add the template in the script code:
` allias: IP scan
sequence:

  • service: shell_command.ipscan
    data: {}
    mode: single `