Asus RT-AC66U: How to Configure DHCP Static IP Reservations for IOT/Smart Home Devices


I’ve never been a fan of using DHCP reservations to reserve an IP address for a device. However, there are a few situations where a static reservation is the best route to take.

Try your hand with Home Automation via devices like the Wink Hub,  IP cameras,  smart plugs,  satellite receivers, or even the Raspberry Pi and you will know full well the right time to use a static IP reservation.

In this post, I am going to walk you through that process on the Asus RT-AC66u.

First, log into your Routers webUI, select “LAN” in the left-hand menu. Then select the “DHCP Server” tab. Scroll midway down the page. Locate “Enable Manual Assignment” and select the “Yes” radio button.



Just below the section above, you will see a drop down box that you can use to select your device using the MAC or currently assigned IP. Enter the “Hostname” for the device. Select “Add/Delete“. This will add your device to the list.



Scroll down and find your device in the list. Select the icon to the left.  Change the “Name” of the device if you so desire. The only really important information here is the “IP” and the “MAC”. 




Here you also can change the default icon for the device, or add your own custom icons. Here, I am using a camera icon that I downloaded.



Below you can see some of the custom icons and names that I have set to help me keep track of my devices.



Home Assistant: Checking configuration.yaml for errors


See instructions below on how to verify your configuration.yaml.

Ssh into your Home Assistant host. In my environment, I am running home assistant on a Raspberry Pi 2.

First I ssh as root. I have manually set the root password and have enabled root logins via /etc/ssh/sshd_config.  I have also added a static DNS entry for my Raspberry Pi 2.

 $ ssh root@ha

Su to the user, homeassistant.

root@ha:/var/log# su – homeassistant

Then run the command below.

homeassistant@ha:~ $ /srv/homeassistant/bin/hass –script check_config
Testing configuration at /home/homeassistant/.homeassistant

If you run into an error, you should see output similar to the example below.

homeassistant@ha:~ $ /srv/homeassistant/bin/hass –script check_config
Testing configuration at /home/homeassistant/.homeassistant
17-02-27 18:20:43 ERROR (MainThread) [homeassistant.bootstrap] Invalid config for [media_player.directv]: required key not provided @ data[‘host’]. Got None. (See ?, line ?). Please check the docs at
Failed config
platform: directv

In the example above, there is an issue with my directv config. I will need to troubleshoot.