Read MAC address from known_devices.yaml

Configuration
1

Hello,
I have some devices listed under known_devices.yaml.
They show up in HA under device_tracker
However, the mac address is not listed in the state attributes even though it is defined in the known_devices.yaml.

lyra_xx1:
  name: Lyra 1
  mac: XX:XX:XX:XX:XX:XX
  icon: mdi:access-point-network
  picture:
  track: true

I want to find the ip address of the device using the mac address in an automation.
Right now, I am doing this in a very complicated way.
My way currently:
device tracker detects the device in “home”
calls a shell command to run a sh script located in a local folder

get_ip: /bin/sh /config/"Bash Scripts"/ip_from_mac.sh

ip_from_mac.sh

#!/bin/sh
arp -n | grep -w -i "$1" | awk '{print $1}' > /config/"Bash Scripts"/ip.txt

the script takes manually entered MAC address in an automation as variable to search the ARP table and write the result in a file called ip.txt.

HA uses file sensor to read the ip.txt and writes these to the input_text.

This way is awfully complicated.
If there was a way to store stdout of the shell command or read MAC address from the known_devices.yaml, it would be a lot simpler.

Any advice to make this simpler for me?

2

You sure? Running

{{ states.device_tracker | selectattr("attributes.mac") | map(attribute="attributes.mac") | list }}

in template designer gives me a list of every device that is tracked by device_tracker and has a MAC address.

{{ states.device_tracker | selectattr("attributes.ip") | map(attribute="attributes.ip") | list }}

Does the same for IP addresses.

3

image
image1231×215 19 KB

Unfortunately, it doesn’t seem to work for me.
I use Asus-wrt integration to populate the device_tracker.
Maybe, this integration doesn’t record MAC addresses. However, they are listed under known_devices.yaml. Hmm, weird.

4

That’s … interesting. How about Entity view in Developer Tools. I see IP and MAC there, too:

grafik

5

image
no mac or ip listed

6

So, it could depend on the Device Tracker integration you use, because mine is AVM Fritzbox and your’s AsusWRT. You could temporarily switch to NMap to check, if this changes things.

7

Yeah, I suspected as such.
But, it is weird that MAC address is listed under known_devices.yaml but not exported to the HA state attributes with Asuswrt integration unlike your AVM Fritzbox. Should I open a bug report or something I wonder?

8

I suggest waiting for the next release of HA, because there has been a commit after 2021.2.3, which obviously (I am not familiar with Python) addresses this.

9

I didn’t know that.
Next month then

10

It has been addressed like you said.
But now it has a different problem. It cannot accurately detect wireless aimesh nodes. It produces weird MAC addresses.